東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Linked to FindBook

Google Book

Amazon

博客來

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

Record Type:	Electronic resources : Monograph/item
Title/Author:	Ultra-Long Distance Free-Space Optical Time Transfer for Future Femtosecond Ground-to-Satellite Clock Networks./
Author:	Cadwell, Emily Dupre.
Description:	1 online resource (147 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 84-11, Section: B.
Contained By:	Dissertations Abstracts International84-11B.
Subject:	Optics. -
Online resource:	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.
LDR:03263nmm a2200397K 4500 001 2358803
005 20230824072022.5
006 m o d
007 cr mn ---uuuuu
008 241011s2023 xx obm 000 0 eng d
020 $a 9798379530525
035 $a (MiAaPQ)AAI30418433
035 $a AAI30418433
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Cadwell, Emily Dupre. $3 3699345
245 1 0 $a Ultra-Long Distance Free-Space Optical Time Transfer for Future Femtosecond Ground-to-Satellite Clock Networks.
264 0 $c 2023
300 $a 1 online resource (147 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 84-11, Section: B.
500 $a Advisor: Newbury, Nathan; Sinclair, Laura.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2023.
504 $a Includes bibliographical references
520 $a 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.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Optics. $3 517925
650 4 $a Physics. $3 516296
650 4 $a Computer engineering. $3 621879
650 4 $a Electrical engineering. $3 649834
653 $a Atmospheric optical turbulence
653 $a Free-space time transfer
653 $a Optical time transfer
653 $a Satellite clock networks
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0752
690 $a 0605
690 $a 0544
690 $a 0464
710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a University of Colorado at Boulder. $b Electrical Engineering. $3 1025672
773 0 $t Dissertations Abstracts International $g 84-11B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30418433 $z click for full text (PQDT)