Atomic-Photonic Integration (A-PhI) Proposers’ Day 20180731... · 2018-08-07 · DISTRIBUTION...
Transcript of Atomic-Photonic Integration (A-PhI) Proposers’ Day 20180731... · 2018-08-07 · DISTRIBUTION...
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Atomic-Photonic Integration (A-PhI)A-Φ
Proposers’ Day
Dr. John Burke
Microsystems Technology Office (MTO)
1 August 2018
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What is A-PhI?
source: www. euramet.org
560 µm
Supporting systems are very large, and
it’s often because of optics and vacuum
systems.
The atomic package necessary to utilize
atomic physics is small.
Atomic physics allows for accurate
and sensitive measurements.
A-PhI is a program that will allow the small size and accuracy of atomic physics to shine through photonic integrated circuits (PICs):
Atomic-Photonic Integration.
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Φ• Knowledge of materials• Familiar with process• Can replace optical train• Experienced designers
A• Knowledge of sources• Experience with measurement• Have testing facilities• Familiar with potential pitfalls
source: www.NIST.gov
Source: IEEE Journal of Selected Topics in Quantum Electronics, 2016, 22, 8300209
A marriage of atomic systems and photonics
A-ΦThe high accuracy of
atomic systems with the portability,
manufacturability, and robustness of photonic
integrated chips.
A marriage for the ages
source: flickr.com/photos/whinendine
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• Convert developed cooling & trapping geometry on PIC
A-PhI technical problem summary
Clock TA1
• Convert known trapping & cooling geometries to PIC
• Convert optical filters to PIC
Gyro TA2
• Architect atom physics trap with area enclosing geometry
• Demonstrate atom analog of IFOG
Generic diagram for atom-based quantum systems
A-PhI will develop the two critical layers of the new paradigm stack
1 cm
20 cm
source: UCSBsource: www.slsoptics.com
Future Work
source: Science 2013, 341, 1215
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Photonics requirements for clocks:Low-loss waveguides and optical frequency combs
• Similar data can be obtained for Yb, Sr+, Yb+• Optical power for the ions is lower but requires bluer lasers• Both neutral and ions will require optical frequency combs
Atom cooling 1 Atom cooling 2 Repump 1 Repump 2 Magic wavelength trap Clock transitionSr wavelength 460.9 689.3 707.2 679.3 813.4 698.4Sr linewidth 32 MHz 7.5 kHz ~MHz ~MHz ~1 mHzSr Power ~100 mW ~10 mW ~5 mW ~5 mW ~W ~10 mW
350 550 750 950 1150
Optical Clock TransitionsYb+
Sr+
Yb
Sr
SiN (n=2.02-2.07) 450 nm cutoff
Al2O3 (n= 1.76 - 1.83) 270 nm cutoff
SiO2 (n = 1.45 - 1.49) 280 nm cutoff
Rev Mod Phys , vol. 87, no. 2, pp. 637 - 701, 2015Boyd Thesis (2007)Bloom Thesis (2010)Campbell Thesis (2017)
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Fiber optic gyro (IFOG)
Trapped atom gyroscopes
Performance ∝ (# turns)∗(area)
Ω
Area15 cm
Area = 17,000 mm2
~10,000 turns
• Based on light wave interference• Light trapped in optical fiber
split
interference
Cold atom gyro
Trapped atom gyro
• Cold atom
• Looped path
~1 cm
Area = 40 mm2
1 “turn”
• Uses wave property of matter• Atoms have 1010 physics enhancement
A-PhI
source: Wikipedia
source: http://web.stanford.edu/group/kasevich/cgi-bin/wordpress/?page_id=11
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State-of-the-art timing
1.E-03
1.E+00
1.E+03
1.E+06
1.E+09
1.E-06 1.E-04 1.E-02 1.E+00 1.E+02 1.E+04Size [Liters]
♦ Quartz/MEMS
♦ Quartz/MEMS Atomic
Size (Liters)10-210-410-6 102 104100
10-3
109
106
103
100Tim
e to
1 n
s err
or (s
ec)
Silicon MEMS
TCXOOCXO
Trapped Atom
Cold Atom
MaserCs beam
SOA OCXOCSAC
ACES
Rb Osc
A-PhIYearMonth
Day
Hour
• Atoms – accuracy, atoms are identical
• Cooled – remove thermal noise
• Trapped – remove acceleration effects
• Optical – 105 higher sensitivity vs. RF
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State-of-the-art gyroscopes
1.000E-07
1.000E-06
1.000E-05
1.000E-04
1.000E-03
1.000E-02
1.000E-01
1.000E+001.00E-041.00E-031.00E-021.00E-011.00E+001.00E+011.00E+021.00E+031.00E+04
Angl
e Ra
ndom
Wal
k (d
eg/h
r1/2 )
Size (L)
10-7
100
10-2
10-1
10-3
10-4
10-5
10-6
10010-2 10-110-310-4 101 102 103 104
ADXRS646
HG1930
KVH1750
HG9900
HG1700
Free-space atom
RH-IFOG
A-PhI
Northrop HRG
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FY2019 FY2020 FY2021 FY2022
TA1Clock
TA2Gyro
FY2019 FY2020 FY2021 FY2022 FY2023
Breadboard clockPhotonic interface for trapped atom clock
Phase 118 months
Phase 218 months
Phase 312 months
Trapped atom gyro scaling & dynamics
Photonic interface for trapped atom gyro
Trap for atom gyro
Contracting
• Demo atom interface
• Demo low noise laser oscillator
• Demo clock
• Demo oscillator
• Demo 10 mm2 Sagnac interferometer
• Demo dynamic operation and refine Sagnac interferometer
Future Work:• Lasers and Electronics
miniaturization
• Environmental test
• Transition to other applications
• Demo Atom-PIC gyro
New BAA
A-PhI technical areas
Photonic interface to trap and interrogate atoms for gyroscope not part of Phase 1 or 2
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A-PhI TA-1 metrics and milestones
Notes are addressed in the full BAA.
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A-PhI TA-2 metrics and milestones
Phase 3 metrics are intended as a guide for performance metrics in Phases 1 and 2. Notes are addressed in the full BAA.
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Free-space optics are defined as: • Discrete optical elements, which
convert an unguided, free-propagating spatial mode of light to another free-propagating spatial mode.
• examples include, but are not limited to: lenses, mirrors, prisms, and polarizers.
Thin, planar-fabricated optics (e.g. meta-material lenses, micro-lens arrays, and gratings) may be excluded from the free-space optic count if they are easily integrable and significantly lower both the cost and complexity of the design.
Key notes
At the conclusion of Phase 1 performers will complete an analysis demonstrating that the technology is capable of achieving the Phase 2 program objectives.
The analysis will detail the proposed laser intensity and frequency for each laser beam, as a function of time through the clock measurement cycle, and this should match the demonstrations on the components.
source: Ealing
source: ThorLabs source: Edmund
source: Comar
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What we envision
Power conditioning, control electronics, and laser systems are not included in thephysics package. If the laser requires frequency narrowing external to the lasercavity, then the components required for the narrowing should be considered partof the A-PhI physics package. Proposals should identify the lasers that will be used.
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Technical Approach Guidance
TA1Although the development of a compact atomic clock is not a part of this solicitation, the goal of the program is to enable a system where all of the components are miniaturized. Therefore, the amenability of the proposed laser component to future miniaturization will be considered when evaluating the proposed solutions.
TA2The optical bench of the atom gyroscopes must be amenable to being replaced with a PIC device in subsequent research.
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Contribution to DARPA mission
Proposers should highlight the contribution of their proposed research to the DARPA mission.
Proposers should also describe previous efforts and their impact on DARPA’s mission and on U.S. National Security, as relevant.
A history of transitioning government-funded technologies to supporting national interests will impact scores positively, while transitioning government-funded technology or related technologies to foreign entities or through foreign influence will negatively impact evaluation scores.
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Submission timeline
Posting Date: 25 July 2018
Proposers’ Day: 1 August 2018
Abstract Due Date: 16 August 2018
FAQ Submission Deadline: 20 September 2018
Proposal Due Date: 27 September 2018
Estimated Period of Performance Start: March 2019
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Proposers’ day agenda
9:00 – 9:30 am Check-in
9:30 – 9:35 am Welcome – Security Brief
9:35 – 10:05 am Contract Management Brief
10:05 – 10:15 am MTO Overview
10:15 – 10:45 am A-PhI Overview
10:45 – 11:00 am Questions Submission / Break
11:00 am – 12:10 pm Teaming/Capabilities Presentations
12:10 – 12:50 pm Lunch
12:50 – 1:20 pm Answers to Questions
1:20 – 1:40 pm Poster Session Set-up
1:40 – 5:00 pm Poster Session
1:40 – 6:15 pm Sidebars with Program Manager
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www.darpa.mil