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Ultra-Long Distance Free-Space Optical Time Transfer for Future Femtosecond Ground-to-Satellite Clock Networks.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Ultra-Long Distance Free-Space Optical Time Transfer for Future Femtosecond Ground-to-Satellite Clock Networks./
作者:	Cadwell, Emily Dupre.
面頁冊數:	1 online resource (147 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-11, Section: B.
Contained By:	Dissertations Abstracts International84-11B.
標題:	Optics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30418433click for full text (PQDT)
ISBN:	9798379530525

Ultra-Long Distance Free-Space Optical Time Transfer for Future Femtosecond Ground-to-Satellite Clock Networks.
Cadwell, Emily Dupre.

Ultra-Long Distance Free-Space Optical Time Transfer for Future Femtosecond Ground-to-Satellite Clock Networks. - 1 online resource (147 pages)

Source: Dissertations Abstracts International, Volume: 84-11, Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2023.

Includes bibliographical references

Future networks of ground and space-based optical atomic clocks promise thousand-fold improvements in global time dissemination, clock-based geodesy, and better tests of fundamental physics. These networks will hinge on high precision, free-space optical time transfer that can operate with the large losses seen in ground-to-space links. My thesis presents critical advancements in free-space time transfer for future ground-to-space demonstrations. First, I present the time programmable frequency comb which is the enabling technology for time transfer at high loss. As a demonstration, I use the time programmable comb in dual-comb ranging and show a 37 dB reduction in the required received power to reach a given ranging precision. I then use the time programmable comb to demonstrate a new technique in free-space time transfer we call tracking comb time transfer. Across 2 km I show tracking comb time transfer is nearly quantum noise limited. Deploying this system to a remote laboratory in Hawaii, I demonstrate sub-femtosecond free-space time transfer across 300 km of air at losses comparable to ground-to-geosynchronous optical links. I complement this experimental work with analysis of noise sources in time transfer. To better inform the noise models of atmospheric phase noise that are important in time transfer, I present additional experimental work that measures atmospheric phase noise with frequency combs for comparison against measurements from in-situ micrometeorological sensors, finding good agreement. Finally, I compare our tracking comb time transfer method to other proposed methods for time and frequency transfer between ground and space. As part of this space-based analysis, I also investigate the noise and link budgets expected for ground-to-geosynchronous orbits.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798379530525Subjects--Topical Terms:

517925
Optics.
Subjects--Index Terms:

Atmospheric optical turbulenceIndex Terms--Genre/Form:

542853
Electronic books.

Ultra-Long Distance Free-Space Optical Time Transfer for Future Femtosecond Ground-to-Satellite Clock Networks.
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