8:30 a.m. - 10:00 a.m. PST	GNSS (for Time Transfers)	Edward Powers
10:15 a.m. - 11:45 a.m. PST	Introduction to Atomic Clocks	Dr. Robert Lutwak
12:45 p.m. - 2:15 p.m. PST	Optical Clocks	Dr. Susannah Dickerson
2:30 p.m. - 4:00 p.m. PST	Optical Transfers	Dr. Per Olof Hedekvist
4:15 p.m. - 5:45 p.m. PST	Optical Combs	Dr. Ryan Gelly

GNSS (for Time Transfers)

Time: Monday, January 23, 8:30 a.m. - 10:00 a.m.
Room: Beacon A (4th Floor)

For many decades, GPS has provided the fundamental synchronizing timing service supporting much of the world’s critical infrastructure. New GNSS services are emerging that will augment and enhance the robustness of the world’s timing services. This tutorial will provide an overview of how GNSS timing services operate and how their underlying timing references support these PTTI services.

Edward Powers works for the Aerospace Corporation as a PNT subject matter expert supporting USSF SSC GPS program and the “new” Space Development Agency's Navigation Cell as PNT technical lead. In 2018, Mr. Powers retired from government service after 31 years working at the United States Naval Observatory as Time Transfer Division Chief, and prior to that the Naval Research Lab.

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Introduction to Atomic Clocks

Time: Monday, January 23, 10:15 a.m. - 11:45 a.m.
Room: Beacon A (4th Floor)

The tutorial introduces atomic clock technology with a focus on the mature technologies of industrial atomic clocks, which can be designed into deployable systems and applications.

Dr. Robert Lutwak is a Technical Fellow in Microchip’s Frequency and Time Systems business unit, supporting research and development of atomic oscillators and frequency standards.

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Optical Clocks

Time: Monday, January 23, 12:45 p.m. - 2:15 p.m.
Room: Beacon A (4th Floor)

The fundamental principles that led to the development of modern optical clocks will be presented. Optical clocks based on trapped neutral atoms in optical lattices or single ions in rf traps currently realize the most accurate frequency standards. An overview of these optical clocks and a comparison of their respective performances will be given. Additional topics may include the basic operation of our standard to a discussion of key systematic shifts that must be well-understood and controlled to achieve high accuracy.

Dr. Susannah Dickerson is a staff scientist at Draper where she is involved in the design, fabrication, and testing of compact optical atomic clocks and quantum gravimeters. Prior to joining Draper in 2017, she completed a postdoc at Harvard and her doctorate at Stanford.

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Optical Transfers

Time: Monday, January 23, 2:30 p.m. - 4:00 p.m.
Room: Beacon A (4th Floor)

Any TF transmission in optical fibers will ultimately be limited by the physics of the fiber and optoelectronics. The tutorial will present the basics, such as attenuation, dispersion, polarization and other sources of perturbations, and how these effects are harnessed to perform ultra-high-performance TF transfer.

Dr. Per Olof Hedekvist has a PhD in Photonics on fiber nonlinearities. He has been with RISE (Swedish NMI) since 2005, working on TF transfer techniques and as teacher in metrology.

 

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Optical Combs

Time: Monday, January 23, 4:15 p.m. - 5:45 p.m.
Room: Beacon A (4th Floor)

Optical frequency combs are highly versatile tools for precision measurements. Providing phase coherent frequency references across the entire optical spectrum, they offer users a unique combination of broad spectral coverage, high spectral resolution, and a calibrated frequency scale. As a result, they have found numerous applications in frequency metrology and beyond. This tutorial will explain how optical frequency combs work, covering the fundamental principles, some practical details, and modern developments.

Dr. Ryan Gelly is a staff scientist at Draper in the photonics systems group. He is responsible for the design, microfabrication, and characterization of integrated photonic devices. Before coming to Draper, Ryan completed his PhD in physics at Harvard University in 2022.

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