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Coherent Combining of Optical Pulses...

Zhou, Tong.

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Coherent Combining of Optical Pulses in Spatial, Spectral and Time Domains.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Coherent Combining of Optical Pulses in Spatial, Spectral and Time Domains./
作者:	Zhou, Tong.
面頁冊數:	168 p.
附註:	Source: Dissertation Abstracts International, Volume: 77-01(E), Section: B.
Contained By:	Dissertation Abstracts International77-01B(E).
標題:	Optics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3722106
ISBN:	9781339040264

Coherent Combining of Optical Pulses in Spatial, Spectral and Time Domains.
Zhou, Tong.

Coherent Combining of Optical Pulses in Spatial, Spectral and Time Domains. - 168 p.

Source: Dissertation Abstracts International, Volume: 77-01(E), Section: B.

Thesis (Ph.D.)--University of Michigan, 2015.

Petawatt-level laser pulses have many potential applications in science and industry, but will require three orders of magnitude increase in pulse repetition rate from existing solid-state laser technology. Fiber lasers can operate at such repetition rates, but are limited in pulse energy. To overcome the gap between current achievable fiber-laser pulse energies (&sim;mJ) and required pulse energies for high-energy applications (up to 10J), this dissertation work explores four novel techniques: (1) Coherent beam combining in the spatial domain; (2) Coherent spectral combining in spatial and spectral domains; (3) Coherent pulse stacking amplification in the time domain; (4) N-squared coherent combining in spatial and time domains.

ISBN: 9781339040264Subjects--Topical Terms:

517925
Optics.

Coherent Combining of Optical Pulses in Spatial, Spectral and Time Domains.
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245 1 0 $a Coherent Combining of Optical Pulses in Spatial, Spectral and Time Domains.
300 $a 168 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-01(E), Section: B.
500 $a Adviser: Almantas Galvanauskas.
502 $a Thesis (Ph.D.)--University of Michigan, 2015.
520 $a Petawatt-level laser pulses have many potential applications in science and industry, but will require three orders of magnitude increase in pulse repetition rate from existing solid-state laser technology. Fiber lasers can operate at such repetition rates, but are limited in pulse energy. To overcome the gap between current achievable fiber-laser pulse energies (&sim;mJ) and required pulse energies for high-energy applications (up to 10J), this dissertation work explores four novel techniques: (1) Coherent beam combining in the spatial domain; (2) Coherent spectral combining in spatial and spectral domains; (3) Coherent pulse stacking amplification in the time domain; (4) N-squared coherent combining in spatial and time domains.
520 $a (1) We demonstrate coherent femtosecond pulse beam combining of up to four chirped-pulse fiber amplifier channels. Theoretical and experimental analysis of combining efficiency dependence on amplitude/phase noise shows the scalability to a large number of channels.
520 $a (2) We demonstrate coherent femtosecond pulse spectral synthesis by combining three parallel fiber chirped-pulse amplifiers, each amplifying different pulse spectra. This technique simultaneously overcomes individual-amplifier energy/power limitations, and spectral gain narrowing in a single fiber amplifier.
520 $a (3) We propose and demonstrate a new technique of coherent pulse stacking (CPS) amplification, which uses reflecting resonators to transform a sequence of phase/amplitude modulated optical pulses into a single output pulse. Experimental validation with a single resonator is demonstrated. We show theoretically that the extension to stacking a large number of equal-amplitude pulses can be achieved using multiple reflecting resonators, which enables the extraction of all stored energy in large-core fiber amplifiers.
520 $a (4) We propose and demonstrate N-squared coherent combining using resonant optical cavities, a novel pulse combining technique based on both spatial combining and temporal stacking. Its unique feature is in an N-channel system the combined pulse energy is enhanced by N-squared times.
520 $a This dissertation work provides the initial experimental and theoretical validations of several novel approaches that use coherent pulse synthesis/combining to achieve power and energy scaling using multiple small-aperture lasers, and serves as an initial step on the path towards future high average-power and petawatt peak-power laser technologies.
590 $a School code: 0127.
650 4 $a Optics. $3 517925
650 4 $a Electrical engineering. $3 649834
650 4 $a Physics. $3 516296
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690 $a 0605
710 2 $a University of Michigan. $b Electrical Engineering. $3 2093655
773 0 $t Dissertation Abstracts International $g 77-01B(E).
790 $a 0127
791 $a Ph.D.
792 $a 2015
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3722106