SlideShare ist ein Scribd-Unternehmen logo
1 von 17
Downloaden Sie, um offline zu lesen
Industrial optically pumped cesium beam clock
Precise Time and Time Interval Meeting, January 23-26, 2023, Long Beach, CA, USA
P. Berthoud, M. Haldimann, F. Kroll, V. Dolgovskiy
© 2023 ADVA. All rights reserved.
2
Outline
Motivation
Design
Performance
Conclusion
1
2
3
4
© 2023 ADVA. All rights reserved.
3
Improve performance while keeping lifetime and compactness
Telecommunication network reference
• Telecom operators, railways, transport, power, …
Enterprise / Data-centers (ICPs) / Finance
• Synchronization of distributed databases,
• Speed trading
PNT market
• Multi verticals GNSS backup
Defense
• Secured telecom, inertial navigation
Space
• Satellite mission tracking, GNSS systems
Science
• Astronomy, nuclear and quantum physics, …
Metrology
• Time scale, fundamental unit measurement
Markets for cesium clocks
© 2023 ADVA. All rights reserved.
4
Outline
Motivation
Design
Performance
Conclusion
1
2
3
4
© 2023 ADVA. All rights reserved.
5
Cs tube
• Produce a cesium atomic beam
• Provide mechanical means to
measure Cs resonance frequency
Optical bench
• Provide laser beams to the Cs
tube for the optical pumping and
optical detection processes
Electronics
• Control the laser
• Control the Cs tube
• Provide an output signal to the
user based on the Cs atom
reference frequency
Optically-pumped cesium clock architecture
Collector
Cs Oven
Collector
Ramsey cavity
C-field coil + magnetic shields
Vacuum enclosure
Laser
FM
sinus
ADC
A A B
Demod
Laser
source
DAC
ADC
FM square +
time sequencer
Demod
RF synth.
DAC
RF pwr
OCXO
DAC
RF freq
DAC
C-field
C-field
source
Output
frequency
© 2023 ADVA. All rights reserved.
6
Cesium tube
Collector
Cs Oven
Collector
Ramsey cavity
C-field coil + magnetic shields
Vacuum enclosure
Laser
A A B
Cesium oven
• Temperature = 100°C
• Compatible with 10 yr lifetime
Ramsey cavity
• Dark fringe (p pulse between arms)
• Loaded quality factor = 500
Atomic fluorescence collectors
• Efficiency >50%
• Laser light trap (50 dB)
Magnetic C-field and shields
• Static and uniform
• Amplitude = 100 mG
© 2023 ADVA. All rights reserved.
7
Optical bench
Collector
Cs Oven
Collector
Ramsey cavity
C-field coil + magnetic shields
Vacuum enclosure
Laser
A A B
Simplest optical setup
• Single laser frequency (D2:3→4’) for
atomic preparation and detection
• DFB laser module
• Free space optics
• No acousto optic modulator
• No optical isolator
Beams (3)
• A: laser frequency lock
(50 mW)
• A’: optical pumping completion
(1.5 mW)
• B: clock transition
detection (50 mW)
© 2023 ADVA. All rights reserved.
8
Laser lock loops
• Sine wave FM (20 kHz)
• Optical frequency by current and temp.
• Optical power by current and temp.
Clock lock loops
• Square wave FM (10 Hz)
• Time sequencer for multiple loops
• Quartz oscillator frequency
• RF field power
• Magnetic C-field amplitude
• Light shift compensation
• All error signals come from atomic signals
and are differential
Processing
• Real time
• Fully digital (FPGA)
Electronics
Collector
Cs Oven
Collector
Ramsey cavity
C-field coil + magnetic shields
Vacuum enclosure
Laser
FM
sinus
ADC
A A B
Demod
Laser
source
DAC
ADC
FM square +
time sequencer
Demod
RF synth.
DAC
RF pwr
OCXO
DAC
RF freq
DAC
C-field
C-field
source
Output
frequency
© 2023 ADVA. All rights reserved.
9
Industrial product OSA-3300 HP
19’’ rack, 3U (450 x 133 x 460 mm3)
35 W
23 kg (battery included)
10 years lifetime
© 2023 ADVA. All rights reserved.
10
Outline
Motivation
Design
Performance
Conclusion
1
2
3
4
© 2023 ADVA. All rights reserved.
11
Symmetric spectrum
Dark fringe behavior
• Minimum signal at resonance
Contrast: 50%
Linewidth: 740 Hz (FWHM)
Signal-to-noise ratio: 15’000 Hz1/2
Fringes per sub-level: 1
• Large destructive fringe interference by the
wide atomic velocity distribution
Open loop performances (Ramsey fringes)
© 2023 ADVA. All rights reserved.
12
Test setup:
• Phase comparision of cesium clock vs. active
hydrogen maser
• Active maser frequency monitored versus GPS
• Carrier frequency: 10 MHz
• Measurement time: 50 days
• Sampling period: 10 s
• Standard lab conditions
Frequency stability
• Overlapping Allan deviation sy(t)
• White FM noise (t-1/2 slope)
• sy(t) = 4E-12 t-1/2 (0.004 ppb @1s)
• Not limited by any flicker FM noise @4E-15
Frequency stability (Allan deviation)
© 2023 ADVA. All rights reserved.
13
Test setup
• Identical as before (same data)
Cesium clock vs. active hydrogen maser
Time interval error
• ± 6 ns over 50 days in free running mode
Time interval error (TIE)
Good candidate to hold time during long GNSS outages (PNT)
© 2023 ADVA. All rights reserved.
14
3300 SHP experimental batch
Test setup
• Cesium clocks vs. active hydrogen maser
Repeatability
• Statistics over 10 clocks
• About ±25% stability dispersion between
clocks
• All clocks comply with HP standard, with a
10 years lifetime basis
© 2023 ADVA. All rights reserved.
15
Outline
Motivation
Design
Performance
Conclusion
1
2
3
4
© 2023 ADVA. All rights reserved.
16
• Design description of an industrial and
compact optically-pumped thermal
cesium beam clock (19’’, 3U rack)
• High performance frequency stability
demonstration using optical pumping
technology (long lifetime)
• Good industrial ground-based back-up
solution for PNT architecture (in case of
GNSS outages)
Conclusions
Thank you
IMPORTANT NOTICE
ADVA is the exclusive owner or licensee of the content, material, and information in this presentation. Any reproduction, publication or reprint, in whole or in part, is strictly prohibited.
The information in this presentation may not be accurate, complete or up to date, and is provided without warranties or representations of any kind, either express or implied. ADVA shall not be responsible for and disclaims any liability for any loss or damages, including without limitation,
direct, indirect, incidental, consequential and special damages, alleged to have been caused by or in connection with using and/or relying on the information contained in this presentation.
Copyright © for the entire content of this presentation: ADVA.
info@oscilloquartz.com

Weitere ähnliche Inhalte

Ähnlich wie Industrial optically pumped cesium beam clock

Timing and synchronization for 5G over optical networks
Timing and synchronization for 5G over optical networksTiming and synchronization for 5G over optical networks
Timing and synchronization for 5G over optical networksADVA
 
UHF/VHFEnergy Harvesting Radio System Physical and MAC Layer Consideration
UHF/VHFEnergy Harvesting Radio System Physical and MAC Layer ConsiderationUHF/VHFEnergy Harvesting Radio System Physical and MAC Layer Consideration
UHF/VHFEnergy Harvesting Radio System Physical and MAC Layer Considerationxiaohuzhang
 
10121-4504-01-PR-Final_Intelligent_Casing-Intelligent_Formation_Telemetry_Sys...
10121-4504-01-PR-Final_Intelligent_Casing-Intelligent_Formation_Telemetry_Sys...10121-4504-01-PR-Final_Intelligent_Casing-Intelligent_Formation_Telemetry_Sys...
10121-4504-01-PR-Final_Intelligent_Casing-Intelligent_Formation_Telemetry_Sys...Jason Edwards
 
Greg Gilmore Modeling Engineer
Greg Gilmore Modeling EngineerGreg Gilmore Modeling Engineer
Greg Gilmore Modeling EngineerGregory Gilmore
 
Integrated Detector Electronics (IDEAS) ASIC product update
Integrated Detector Electronics (IDEAS) ASIC product updateIntegrated Detector Electronics (IDEAS) ASIC product update
Integrated Detector Electronics (IDEAS) ASIC product updateGunnar Maehlum
 
AinaBpresentation29122020_bh 06012021.pptx
AinaBpresentation29122020_bh 06012021.pptxAinaBpresentation29122020_bh 06012021.pptx
AinaBpresentation29122020_bh 06012021.pptxYosraBOUCHOUCHA2
 
TV Repack & ATSC 3.0: SFN & Future proofing antennas
TV Repack & ATSC 3.0:  SFN & Future proofing antennasTV Repack & ATSC 3.0:  SFN & Future proofing antennas
TV Repack & ATSC 3.0: SFN & Future proofing antennaskmsavage
 
Final Presentation
Final PresentationFinal Presentation
Final PresentationAsh Abel
 
Optical timing channel (OTC) solution delivers new levels of network synchron...
Optical timing channel (OTC) solution delivers new levels of network synchron...Optical timing channel (OTC) solution delivers new levels of network synchron...
Optical timing channel (OTC) solution delivers new levels of network synchron...ADVA
 
Real-time Implementation of Sphere Decoder-based MIMO Wireless System (EUSIPC...
Real-time Implementation of Sphere Decoder-based MIMO Wireless System (EUSIPC...Real-time Implementation of Sphere Decoder-based MIMO Wireless System (EUSIPC...
Real-time Implementation of Sphere Decoder-based MIMO Wireless System (EUSIPC...TSC University of Mondragon
 
Antennas Design and Packaging for Millimeter-Wave Phased-Array Transceivers...
Antennas Design and Packaging for  Millimeter-Wave Phased-Array  Transceivers...Antennas Design and Packaging for  Millimeter-Wave Phased-Array  Transceivers...
Antennas Design and Packaging for Millimeter-Wave Phased-Array Transceivers...shankar kumar
 
Complementary inverted reactive slot antenna embedded in single
Complementary inverted reactive slot antenna embedded in singleComplementary inverted reactive slot antenna embedded in single
Complementary inverted reactive slot antenna embedded in singleMonodip Singha Roy
 
Boyd - High Speed Monitoring
Boyd - High Speed MonitoringBoyd - High Speed Monitoring
Boyd - High Speed MonitoringMatthew Boyd
 
Multi-Funtion Phased Array Radar
Multi-Funtion Phased Array RadarMulti-Funtion Phased Array Radar
Multi-Funtion Phased Array RadarMistral Solutions
 
Multi-channel Detector Readout Integrated Circuits with ADCs for X-ray and Ga...
Multi-channel Detector Readout Integrated Circuits with ADCs for X-ray and Ga...Multi-channel Detector Readout Integrated Circuits with ADCs for X-ray and Ga...
Multi-channel Detector Readout Integrated Circuits with ADCs for X-ray and Ga...Gunnar Maehlum
 

Ähnlich wie Industrial optically pumped cesium beam clock (20)

Timing and synchronization for 5G over optical networks
Timing and synchronization for 5G over optical networksTiming and synchronization for 5G over optical networks
Timing and synchronization for 5G over optical networks
 
UHF/VHFEnergy Harvesting Radio System Physical and MAC Layer Consideration
UHF/VHFEnergy Harvesting Radio System Physical and MAC Layer ConsiderationUHF/VHFEnergy Harvesting Radio System Physical and MAC Layer Consideration
UHF/VHFEnergy Harvesting Radio System Physical and MAC Layer Consideration
 
10121-4504-01-PR-Final_Intelligent_Casing-Intelligent_Formation_Telemetry_Sys...
10121-4504-01-PR-Final_Intelligent_Casing-Intelligent_Formation_Telemetry_Sys...10121-4504-01-PR-Final_Intelligent_Casing-Intelligent_Formation_Telemetry_Sys...
10121-4504-01-PR-Final_Intelligent_Casing-Intelligent_Formation_Telemetry_Sys...
 
Introduction to RADAR by NI
Introduction to RADAR by NIIntroduction to RADAR by NI
Introduction to RADAR by NI
 
Greg Gilmore Modeling Engineer
Greg Gilmore Modeling EngineerGreg Gilmore Modeling Engineer
Greg Gilmore Modeling Engineer
 
Integrated Detector Electronics (IDEAS) ASIC product update
Integrated Detector Electronics (IDEAS) ASIC product updateIntegrated Detector Electronics (IDEAS) ASIC product update
Integrated Detector Electronics (IDEAS) ASIC product update
 
AinaBpresentation29122020_bh 06012021.pptx
AinaBpresentation29122020_bh 06012021.pptxAinaBpresentation29122020_bh 06012021.pptx
AinaBpresentation29122020_bh 06012021.pptx
 
TV Repack & ATSC 3.0: SFN & Future proofing antennas
TV Repack & ATSC 3.0:  SFN & Future proofing antennasTV Repack & ATSC 3.0:  SFN & Future proofing antennas
TV Repack & ATSC 3.0: SFN & Future proofing antennas
 
Final Presentation
Final PresentationFinal Presentation
Final Presentation
 
Optical timing channel (OTC) solution delivers new levels of network synchron...
Optical timing channel (OTC) solution delivers new levels of network synchron...Optical timing channel (OTC) solution delivers new levels of network synchron...
Optical timing channel (OTC) solution delivers new levels of network synchron...
 
Real-time Implementation of Sphere Decoder-based MIMO Wireless System (EUSIPC...
Real-time Implementation of Sphere Decoder-based MIMO Wireless System (EUSIPC...Real-time Implementation of Sphere Decoder-based MIMO Wireless System (EUSIPC...
Real-time Implementation of Sphere Decoder-based MIMO Wireless System (EUSIPC...
 
sync sources - overview
 sync sources - overview sync sources - overview
sync sources - overview
 
general overview
 general overview general overview
general overview
 
Antennas Design and Packaging for Millimeter-Wave Phased-Array Transceivers...
Antennas Design and Packaging for  Millimeter-Wave Phased-Array  Transceivers...Antennas Design and Packaging for  Millimeter-Wave Phased-Array  Transceivers...
Antennas Design and Packaging for Millimeter-Wave Phased-Array Transceivers...
 
Complementary inverted reactive slot antenna embedded in single
Complementary inverted reactive slot antenna embedded in singleComplementary inverted reactive slot antenna embedded in single
Complementary inverted reactive slot antenna embedded in single
 
61 boyd high_speed_monitoring
61 boyd high_speed_monitoring61 boyd high_speed_monitoring
61 boyd high_speed_monitoring
 
Boyd - High Speed Monitoring
Boyd - High Speed MonitoringBoyd - High Speed Monitoring
Boyd - High Speed Monitoring
 
Silviu Livescu
Silviu LivescuSilviu Livescu
Silviu Livescu
 
Multi-Funtion Phased Array Radar
Multi-Funtion Phased Array RadarMulti-Funtion Phased Array Radar
Multi-Funtion Phased Array Radar
 
Multi-channel Detector Readout Integrated Circuits with ADCs for X-ray and Ga...
Multi-channel Detector Readout Integrated Circuits with ADCs for X-ray and Ga...Multi-channel Detector Readout Integrated Circuits with ADCs for X-ray and Ga...
Multi-channel Detector Readout Integrated Circuits with ADCs for X-ray and Ga...
 

Mehr von ADVA

The need for GBaaS as GPS/GNSS is no longer a reliable source for critical PN...
The need for GBaaS as GPS/GNSS is no longer a reliable source for critical PN...The need for GBaaS as GPS/GNSS is no longer a reliable source for critical PN...
The need for GBaaS as GPS/GNSS is no longer a reliable source for critical PN...ADVA
 
Industry's longest holdover with the OSA 3350 SePRC™ optical cesium clock
Industry's longest holdover with the OSA 3350  SePRC™ optical cesium clockIndustry's longest holdover with the OSA 3350  SePRC™ optical cesium clock
Industry's longest holdover with the OSA 3350 SePRC™ optical cesium clockADVA
 
Addressing PNT threats in critical defense infrastructure
Addressing PNT threats in critical defense infrastructureAddressing PNT threats in critical defense infrastructure
Addressing PNT threats in critical defense infrastructureADVA
 
Precise and assured timing for enterprise networks
Precise and assured timing for enterprise networksPrecise and assured timing for enterprise networks
Precise and assured timing for enterprise networksADVA
 
Introducing Ensemble Cloudlet for on-premises cloud demand
Introducing Ensemble Cloudlet for on-premises cloud demandIntroducing Ensemble Cloudlet for on-premises cloud demand
Introducing Ensemble Cloudlet for on-premises cloud demandADVA
 
ePRTC in data centers - GNSS-backup-as-a-service (GBaaS)
ePRTC in data centers - GNSS-backup-as-a-service (GBaaS)ePRTC in data centers - GNSS-backup-as-a-service (GBaaS)
ePRTC in data centers - GNSS-backup-as-a-service (GBaaS)ADVA
 
Sync on TAP - Syncing infrastructure with software
Sync on TAP - Syncing infrastructure with softwareSync on TAP - Syncing infrastructure with software
Sync on TAP - Syncing infrastructure with softwareADVA
 
Meet stringent latency demands with time-sensitive networking
Meet stringent latency demands with time-sensitive networkingMeet stringent latency demands with time-sensitive networking
Meet stringent latency demands with time-sensitive networkingADVA
 
Making networks secure with multi-layer encryption
Making networks secure with multi-layer encryptionMaking networks secure with multi-layer encryption
Making networks secure with multi-layer encryptionADVA
 
Quantum threat: How to protect your optical network
Quantum threat: How to protect your optical networkQuantum threat: How to protect your optical network
Quantum threat: How to protect your optical networkADVA
 
Optical networks and the ecodesign tradeoff between climate change mitigation...
Optical networks and the ecodesign tradeoff between climate change mitigation...Optical networks and the ecodesign tradeoff between climate change mitigation...
Optical networks and the ecodesign tradeoff between climate change mitigation...ADVA
 
Trends in next-generation data center interconnects (DCI)
Trends in next-generation data center interconnects (DCI)Trends in next-generation data center interconnects (DCI)
Trends in next-generation data center interconnects (DCI)ADVA
 
Open optical edge connecting mobile access networks
Open optical edge connecting mobile access networksOpen optical edge connecting mobile access networks
Open optical edge connecting mobile access networksADVA
 
Introducing Adva Network Security – a trusted German anchor
Introducing Adva Network Security – a trusted German anchorIntroducing Adva Network Security – a trusted German anchor
Introducing Adva Network Security – a trusted German anchorADVA
 
Meet the industry's first pluggable 10G demarcation device
Meet the industry's first pluggable 10G demarcation deviceMeet the industry's first pluggable 10G demarcation device
Meet the industry's first pluggable 10G demarcation deviceADVA
 
Introducing ADVA AccessWave25™
Introducing ADVA AccessWave25™Introducing ADVA AccessWave25™
Introducing ADVA AccessWave25™ADVA
 
10G edge technology for outdoor environments
10G edge technology for outdoor environments10G edge technology for outdoor environments
10G edge technology for outdoor environmentsADVA
 
The quantum age - secure transport networks
The quantum age - secure transport networksThe quantum age - secure transport networks
The quantum age - secure transport networksADVA
 
From leased lines to optical spectrum services
From leased lines to optical spectrum servicesFrom leased lines to optical spectrum services
From leased lines to optical spectrum servicesADVA
 
The coherent optical edge
The coherent optical edgeThe coherent optical edge
The coherent optical edgeADVA
 

Mehr von ADVA (20)

The need for GBaaS as GPS/GNSS is no longer a reliable source for critical PN...
The need for GBaaS as GPS/GNSS is no longer a reliable source for critical PN...The need for GBaaS as GPS/GNSS is no longer a reliable source for critical PN...
The need for GBaaS as GPS/GNSS is no longer a reliable source for critical PN...
 
Industry's longest holdover with the OSA 3350 SePRC™ optical cesium clock
Industry's longest holdover with the OSA 3350  SePRC™ optical cesium clockIndustry's longest holdover with the OSA 3350  SePRC™ optical cesium clock
Industry's longest holdover with the OSA 3350 SePRC™ optical cesium clock
 
Addressing PNT threats in critical defense infrastructure
Addressing PNT threats in critical defense infrastructureAddressing PNT threats in critical defense infrastructure
Addressing PNT threats in critical defense infrastructure
 
Precise and assured timing for enterprise networks
Precise and assured timing for enterprise networksPrecise and assured timing for enterprise networks
Precise and assured timing for enterprise networks
 
Introducing Ensemble Cloudlet for on-premises cloud demand
Introducing Ensemble Cloudlet for on-premises cloud demandIntroducing Ensemble Cloudlet for on-premises cloud demand
Introducing Ensemble Cloudlet for on-premises cloud demand
 
ePRTC in data centers - GNSS-backup-as-a-service (GBaaS)
ePRTC in data centers - GNSS-backup-as-a-service (GBaaS)ePRTC in data centers - GNSS-backup-as-a-service (GBaaS)
ePRTC in data centers - GNSS-backup-as-a-service (GBaaS)
 
Sync on TAP - Syncing infrastructure with software
Sync on TAP - Syncing infrastructure with softwareSync on TAP - Syncing infrastructure with software
Sync on TAP - Syncing infrastructure with software
 
Meet stringent latency demands with time-sensitive networking
Meet stringent latency demands with time-sensitive networkingMeet stringent latency demands with time-sensitive networking
Meet stringent latency demands with time-sensitive networking
 
Making networks secure with multi-layer encryption
Making networks secure with multi-layer encryptionMaking networks secure with multi-layer encryption
Making networks secure with multi-layer encryption
 
Quantum threat: How to protect your optical network
Quantum threat: How to protect your optical networkQuantum threat: How to protect your optical network
Quantum threat: How to protect your optical network
 
Optical networks and the ecodesign tradeoff between climate change mitigation...
Optical networks and the ecodesign tradeoff between climate change mitigation...Optical networks and the ecodesign tradeoff between climate change mitigation...
Optical networks and the ecodesign tradeoff between climate change mitigation...
 
Trends in next-generation data center interconnects (DCI)
Trends in next-generation data center interconnects (DCI)Trends in next-generation data center interconnects (DCI)
Trends in next-generation data center interconnects (DCI)
 
Open optical edge connecting mobile access networks
Open optical edge connecting mobile access networksOpen optical edge connecting mobile access networks
Open optical edge connecting mobile access networks
 
Introducing Adva Network Security – a trusted German anchor
Introducing Adva Network Security – a trusted German anchorIntroducing Adva Network Security – a trusted German anchor
Introducing Adva Network Security – a trusted German anchor
 
Meet the industry's first pluggable 10G demarcation device
Meet the industry's first pluggable 10G demarcation deviceMeet the industry's first pluggable 10G demarcation device
Meet the industry's first pluggable 10G demarcation device
 
Introducing ADVA AccessWave25™
Introducing ADVA AccessWave25™Introducing ADVA AccessWave25™
Introducing ADVA AccessWave25™
 
10G edge technology for outdoor environments
10G edge technology for outdoor environments10G edge technology for outdoor environments
10G edge technology for outdoor environments
 
The quantum age - secure transport networks
The quantum age - secure transport networksThe quantum age - secure transport networks
The quantum age - secure transport networks
 
From leased lines to optical spectrum services
From leased lines to optical spectrum servicesFrom leased lines to optical spectrum services
From leased lines to optical spectrum services
 
The coherent optical edge
The coherent optical edgeThe coherent optical edge
The coherent optical edge
 

Kürzlich hochgeladen

Testing tools and AI - ideas what to try with some tool examples
Testing tools and AI - ideas what to try with some tool examplesTesting tools and AI - ideas what to try with some tool examples
Testing tools and AI - ideas what to try with some tool examplesKari Kakkonen
 
A Deep Dive on Passkeys: FIDO Paris Seminar.pptx
A Deep Dive on Passkeys: FIDO Paris Seminar.pptxA Deep Dive on Passkeys: FIDO Paris Seminar.pptx
A Deep Dive on Passkeys: FIDO Paris Seminar.pptxLoriGlavin3
 
Landscape Catalogue 2024 Australia-1.pdf
Landscape Catalogue 2024 Australia-1.pdfLandscape Catalogue 2024 Australia-1.pdf
Landscape Catalogue 2024 Australia-1.pdfAarwolf Industries LLC
 
Digital Identity is Under Attack: FIDO Paris Seminar.pptx
Digital Identity is Under Attack: FIDO Paris Seminar.pptxDigital Identity is Under Attack: FIDO Paris Seminar.pptx
Digital Identity is Under Attack: FIDO Paris Seminar.pptxLoriGlavin3
 
Genislab builds better products and faster go-to-market with Lean project man...
Genislab builds better products and faster go-to-market with Lean project man...Genislab builds better products and faster go-to-market with Lean project man...
Genislab builds better products and faster go-to-market with Lean project man...Farhan Tariq
 
Unleashing Real-time Insights with ClickHouse_ Navigating the Landscape in 20...
Unleashing Real-time Insights with ClickHouse_ Navigating the Landscape in 20...Unleashing Real-time Insights with ClickHouse_ Navigating the Landscape in 20...
Unleashing Real-time Insights with ClickHouse_ Navigating the Landscape in 20...Alkin Tezuysal
 
Moving Beyond Passwords: FIDO Paris Seminar.pdf
Moving Beyond Passwords: FIDO Paris Seminar.pdfMoving Beyond Passwords: FIDO Paris Seminar.pdf
Moving Beyond Passwords: FIDO Paris Seminar.pdfLoriGlavin3
 
Transcript: New from BookNet Canada for 2024: BNC SalesData and LibraryData -...
Transcript: New from BookNet Canada for 2024: BNC SalesData and LibraryData -...Transcript: New from BookNet Canada for 2024: BNC SalesData and LibraryData -...
Transcript: New from BookNet Canada for 2024: BNC SalesData and LibraryData -...BookNet Canada
 
Varsha Sewlal- Cyber Attacks on Critical Critical Infrastructure
Varsha Sewlal- Cyber Attacks on Critical Critical InfrastructureVarsha Sewlal- Cyber Attacks on Critical Critical Infrastructure
Varsha Sewlal- Cyber Attacks on Critical Critical Infrastructureitnewsafrica
 
2024 April Patch Tuesday
2024 April Patch Tuesday2024 April Patch Tuesday
2024 April Patch TuesdayIvanti
 
Design pattern talk by Kaya Weers - 2024 (v2)
Design pattern talk by Kaya Weers - 2024 (v2)Design pattern talk by Kaya Weers - 2024 (v2)
Design pattern talk by Kaya Weers - 2024 (v2)Kaya Weers
 
A Journey Into the Emotions of Software Developers
A Journey Into the Emotions of Software DevelopersA Journey Into the Emotions of Software Developers
A Journey Into the Emotions of Software DevelopersNicole Novielli
 
UiPath Community: Communication Mining from Zero to Hero
UiPath Community: Communication Mining from Zero to HeroUiPath Community: Communication Mining from Zero to Hero
UiPath Community: Communication Mining from Zero to HeroUiPathCommunity
 
Bridging Between CAD & GIS: 6 Ways to Automate Your Data Integration
Bridging Between CAD & GIS:  6 Ways to Automate Your Data IntegrationBridging Between CAD & GIS:  6 Ways to Automate Your Data Integration
Bridging Between CAD & GIS: 6 Ways to Automate Your Data Integrationmarketing932765
 
Modern Roaming for Notes and Nomad – Cheaper Faster Better Stronger
Modern Roaming for Notes and Nomad – Cheaper Faster Better StrongerModern Roaming for Notes and Nomad – Cheaper Faster Better Stronger
Modern Roaming for Notes and Nomad – Cheaper Faster Better Strongerpanagenda
 
Scale your database traffic with Read & Write split using MySQL Router
Scale your database traffic with Read & Write split using MySQL RouterScale your database traffic with Read & Write split using MySQL Router
Scale your database traffic with Read & Write split using MySQL RouterMydbops
 
Zeshan Sattar- Assessing the skill requirements and industry expectations for...
Zeshan Sattar- Assessing the skill requirements and industry expectations for...Zeshan Sattar- Assessing the skill requirements and industry expectations for...
Zeshan Sattar- Assessing the skill requirements and industry expectations for...itnewsafrica
 
React JS; all concepts. Contains React Features, JSX, functional & Class comp...
React JS; all concepts. Contains React Features, JSX, functional & Class comp...React JS; all concepts. Contains React Features, JSX, functional & Class comp...
React JS; all concepts. Contains React Features, JSX, functional & Class comp...Karmanjay Verma
 
A Framework for Development in the AI Age
A Framework for Development in the AI AgeA Framework for Development in the AI Age
A Framework for Development in the AI AgeCprime
 
Email Marketing Automation for Bonterra Impact Management (fka Social Solutio...
Email Marketing Automation for Bonterra Impact Management (fka Social Solutio...Email Marketing Automation for Bonterra Impact Management (fka Social Solutio...
Email Marketing Automation for Bonterra Impact Management (fka Social Solutio...Jeffrey Haguewood
 

Kürzlich hochgeladen (20)

Testing tools and AI - ideas what to try with some tool examples
Testing tools and AI - ideas what to try with some tool examplesTesting tools and AI - ideas what to try with some tool examples
Testing tools and AI - ideas what to try with some tool examples
 
A Deep Dive on Passkeys: FIDO Paris Seminar.pptx
A Deep Dive on Passkeys: FIDO Paris Seminar.pptxA Deep Dive on Passkeys: FIDO Paris Seminar.pptx
A Deep Dive on Passkeys: FIDO Paris Seminar.pptx
 
Landscape Catalogue 2024 Australia-1.pdf
Landscape Catalogue 2024 Australia-1.pdfLandscape Catalogue 2024 Australia-1.pdf
Landscape Catalogue 2024 Australia-1.pdf
 
Digital Identity is Under Attack: FIDO Paris Seminar.pptx
Digital Identity is Under Attack: FIDO Paris Seminar.pptxDigital Identity is Under Attack: FIDO Paris Seminar.pptx
Digital Identity is Under Attack: FIDO Paris Seminar.pptx
 
Genislab builds better products and faster go-to-market with Lean project man...
Genislab builds better products and faster go-to-market with Lean project man...Genislab builds better products and faster go-to-market with Lean project man...
Genislab builds better products and faster go-to-market with Lean project man...
 
Unleashing Real-time Insights with ClickHouse_ Navigating the Landscape in 20...
Unleashing Real-time Insights with ClickHouse_ Navigating the Landscape in 20...Unleashing Real-time Insights with ClickHouse_ Navigating the Landscape in 20...
Unleashing Real-time Insights with ClickHouse_ Navigating the Landscape in 20...
 
Moving Beyond Passwords: FIDO Paris Seminar.pdf
Moving Beyond Passwords: FIDO Paris Seminar.pdfMoving Beyond Passwords: FIDO Paris Seminar.pdf
Moving Beyond Passwords: FIDO Paris Seminar.pdf
 
Transcript: New from BookNet Canada for 2024: BNC SalesData and LibraryData -...
Transcript: New from BookNet Canada for 2024: BNC SalesData and LibraryData -...Transcript: New from BookNet Canada for 2024: BNC SalesData and LibraryData -...
Transcript: New from BookNet Canada for 2024: BNC SalesData and LibraryData -...
 
Varsha Sewlal- Cyber Attacks on Critical Critical Infrastructure
Varsha Sewlal- Cyber Attacks on Critical Critical InfrastructureVarsha Sewlal- Cyber Attacks on Critical Critical Infrastructure
Varsha Sewlal- Cyber Attacks on Critical Critical Infrastructure
 
2024 April Patch Tuesday
2024 April Patch Tuesday2024 April Patch Tuesday
2024 April Patch Tuesday
 
Design pattern talk by Kaya Weers - 2024 (v2)
Design pattern talk by Kaya Weers - 2024 (v2)Design pattern talk by Kaya Weers - 2024 (v2)
Design pattern talk by Kaya Weers - 2024 (v2)
 
A Journey Into the Emotions of Software Developers
A Journey Into the Emotions of Software DevelopersA Journey Into the Emotions of Software Developers
A Journey Into the Emotions of Software Developers
 
UiPath Community: Communication Mining from Zero to Hero
UiPath Community: Communication Mining from Zero to HeroUiPath Community: Communication Mining from Zero to Hero
UiPath Community: Communication Mining from Zero to Hero
 
Bridging Between CAD & GIS: 6 Ways to Automate Your Data Integration
Bridging Between CAD & GIS:  6 Ways to Automate Your Data IntegrationBridging Between CAD & GIS:  6 Ways to Automate Your Data Integration
Bridging Between CAD & GIS: 6 Ways to Automate Your Data Integration
 
Modern Roaming for Notes and Nomad – Cheaper Faster Better Stronger
Modern Roaming for Notes and Nomad – Cheaper Faster Better StrongerModern Roaming for Notes and Nomad – Cheaper Faster Better Stronger
Modern Roaming for Notes and Nomad – Cheaper Faster Better Stronger
 
Scale your database traffic with Read & Write split using MySQL Router
Scale your database traffic with Read & Write split using MySQL RouterScale your database traffic with Read & Write split using MySQL Router
Scale your database traffic with Read & Write split using MySQL Router
 
Zeshan Sattar- Assessing the skill requirements and industry expectations for...
Zeshan Sattar- Assessing the skill requirements and industry expectations for...Zeshan Sattar- Assessing the skill requirements and industry expectations for...
Zeshan Sattar- Assessing the skill requirements and industry expectations for...
 
React JS; all concepts. Contains React Features, JSX, functional & Class comp...
React JS; all concepts. Contains React Features, JSX, functional & Class comp...React JS; all concepts. Contains React Features, JSX, functional & Class comp...
React JS; all concepts. Contains React Features, JSX, functional & Class comp...
 
A Framework for Development in the AI Age
A Framework for Development in the AI AgeA Framework for Development in the AI Age
A Framework for Development in the AI Age
 
Email Marketing Automation for Bonterra Impact Management (fka Social Solutio...
Email Marketing Automation for Bonterra Impact Management (fka Social Solutio...Email Marketing Automation for Bonterra Impact Management (fka Social Solutio...
Email Marketing Automation for Bonterra Impact Management (fka Social Solutio...
 

Industrial optically pumped cesium beam clock

  • 1. Industrial optically pumped cesium beam clock Precise Time and Time Interval Meeting, January 23-26, 2023, Long Beach, CA, USA P. Berthoud, M. Haldimann, F. Kroll, V. Dolgovskiy
  • 2. © 2023 ADVA. All rights reserved. 2 Outline Motivation Design Performance Conclusion 1 2 3 4
  • 3. © 2023 ADVA. All rights reserved. 3 Improve performance while keeping lifetime and compactness Telecommunication network reference • Telecom operators, railways, transport, power, … Enterprise / Data-centers (ICPs) / Finance • Synchronization of distributed databases, • Speed trading PNT market • Multi verticals GNSS backup Defense • Secured telecom, inertial navigation Space • Satellite mission tracking, GNSS systems Science • Astronomy, nuclear and quantum physics, … Metrology • Time scale, fundamental unit measurement Markets for cesium clocks
  • 4. © 2023 ADVA. All rights reserved. 4 Outline Motivation Design Performance Conclusion 1 2 3 4
  • 5. © 2023 ADVA. All rights reserved. 5 Cs tube • Produce a cesium atomic beam • Provide mechanical means to measure Cs resonance frequency Optical bench • Provide laser beams to the Cs tube for the optical pumping and optical detection processes Electronics • Control the laser • Control the Cs tube • Provide an output signal to the user based on the Cs atom reference frequency Optically-pumped cesium clock architecture Collector Cs Oven Collector Ramsey cavity C-field coil + magnetic shields Vacuum enclosure Laser FM sinus ADC A A B Demod Laser source DAC ADC FM square + time sequencer Demod RF synth. DAC RF pwr OCXO DAC RF freq DAC C-field C-field source Output frequency
  • 6. © 2023 ADVA. All rights reserved. 6 Cesium tube Collector Cs Oven Collector Ramsey cavity C-field coil + magnetic shields Vacuum enclosure Laser A A B Cesium oven • Temperature = 100°C • Compatible with 10 yr lifetime Ramsey cavity • Dark fringe (p pulse between arms) • Loaded quality factor = 500 Atomic fluorescence collectors • Efficiency >50% • Laser light trap (50 dB) Magnetic C-field and shields • Static and uniform • Amplitude = 100 mG
  • 7. © 2023 ADVA. All rights reserved. 7 Optical bench Collector Cs Oven Collector Ramsey cavity C-field coil + magnetic shields Vacuum enclosure Laser A A B Simplest optical setup • Single laser frequency (D2:3→4’) for atomic preparation and detection • DFB laser module • Free space optics • No acousto optic modulator • No optical isolator Beams (3) • A: laser frequency lock (50 mW) • A’: optical pumping completion (1.5 mW) • B: clock transition detection (50 mW)
  • 8. © 2023 ADVA. All rights reserved. 8 Laser lock loops • Sine wave FM (20 kHz) • Optical frequency by current and temp. • Optical power by current and temp. Clock lock loops • Square wave FM (10 Hz) • Time sequencer for multiple loops • Quartz oscillator frequency • RF field power • Magnetic C-field amplitude • Light shift compensation • All error signals come from atomic signals and are differential Processing • Real time • Fully digital (FPGA) Electronics Collector Cs Oven Collector Ramsey cavity C-field coil + magnetic shields Vacuum enclosure Laser FM sinus ADC A A B Demod Laser source DAC ADC FM square + time sequencer Demod RF synth. DAC RF pwr OCXO DAC RF freq DAC C-field C-field source Output frequency
  • 9. © 2023 ADVA. All rights reserved. 9 Industrial product OSA-3300 HP 19’’ rack, 3U (450 x 133 x 460 mm3) 35 W 23 kg (battery included) 10 years lifetime
  • 10. © 2023 ADVA. All rights reserved. 10 Outline Motivation Design Performance Conclusion 1 2 3 4
  • 11. © 2023 ADVA. All rights reserved. 11 Symmetric spectrum Dark fringe behavior • Minimum signal at resonance Contrast: 50% Linewidth: 740 Hz (FWHM) Signal-to-noise ratio: 15’000 Hz1/2 Fringes per sub-level: 1 • Large destructive fringe interference by the wide atomic velocity distribution Open loop performances (Ramsey fringes)
  • 12. © 2023 ADVA. All rights reserved. 12 Test setup: • Phase comparision of cesium clock vs. active hydrogen maser • Active maser frequency monitored versus GPS • Carrier frequency: 10 MHz • Measurement time: 50 days • Sampling period: 10 s • Standard lab conditions Frequency stability • Overlapping Allan deviation sy(t) • White FM noise (t-1/2 slope) • sy(t) = 4E-12 t-1/2 (0.004 ppb @1s) • Not limited by any flicker FM noise @4E-15 Frequency stability (Allan deviation)
  • 13. © 2023 ADVA. All rights reserved. 13 Test setup • Identical as before (same data) Cesium clock vs. active hydrogen maser Time interval error • ± 6 ns over 50 days in free running mode Time interval error (TIE) Good candidate to hold time during long GNSS outages (PNT)
  • 14. © 2023 ADVA. All rights reserved. 14 3300 SHP experimental batch Test setup • Cesium clocks vs. active hydrogen maser Repeatability • Statistics over 10 clocks • About ±25% stability dispersion between clocks • All clocks comply with HP standard, with a 10 years lifetime basis
  • 15. © 2023 ADVA. All rights reserved. 15 Outline Motivation Design Performance Conclusion 1 2 3 4
  • 16. © 2023 ADVA. All rights reserved. 16 • Design description of an industrial and compact optically-pumped thermal cesium beam clock (19’’, 3U rack) • High performance frequency stability demonstration using optical pumping technology (long lifetime) • Good industrial ground-based back-up solution for PNT architecture (in case of GNSS outages) Conclusions
  • 17. Thank you IMPORTANT NOTICE ADVA is the exclusive owner or licensee of the content, material, and information in this presentation. Any reproduction, publication or reprint, in whole or in part, is strictly prohibited. The information in this presentation may not be accurate, complete or up to date, and is provided without warranties or representations of any kind, either express or implied. ADVA shall not be responsible for and disclaims any liability for any loss or damages, including without limitation, direct, indirect, incidental, consequential and special damages, alleged to have been caused by or in connection with using and/or relying on the information contained in this presentation. Copyright © for the entire content of this presentation: ADVA. info@oscilloquartz.com