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Modeling High-Energy Temporal and Sp...

Ding, Edwin.

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Modeling High-Energy Temporal and Spatial Mode-Locking.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Modeling High-Energy Temporal and Spatial Mode-Locking./
作者:	Ding, Edwin.
面頁冊數:	108 p.
附註:	Source: Dissertation Abstracts International, Volume: 73-02, Section: B, page: 1024.
Contained By:	Dissertation Abstracts International73-02B.
標題:	Applied mathematics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3485360
ISBN:	9781267027238

Modeling High-Energy Temporal and Spatial Mode-Locking.
Ding, Edwin.

Modeling High-Energy Temporal and Spatial Mode-Locking. - 108 p.

Source: Dissertation Abstracts International, Volume: 73-02, Section: B, page: 1024.

Thesis (Ph.D.)--University of Washington, 2011.

Mode-locking refers to the generation of ultrashort optical pulses in laser systems. Since its first proposed use in the early 90's, the ring cavity fiber laser mode-locked by utilizing the nonlinear polarization rotation technique has become one of the most reliable and compact sources for robust ultra-short optical pulses. The pulse dynamics is dominated by the interaction of the fiber's cubic Kerr nonlinearity and chromatic dispersion with an intensity-discriminating mechanism (saturable absorption) provided by the mode-locking element(s) in the laser cavity. This intensity discrimination favors the high-intensity portions of the electric field over the low-intensity portions so that a pulse can be formed. However, due to the limitations in the energy output, these fiber lasers have lagged well behind the solid-state lasers in the key performance parameters. A comprehensive study of achieving high-energy pulses in a ring cavity laser that is passively mode-locked by a series of waveplates and a polarizer is presented in this dissertation. Specifically, it is shown that the multi-pulsing instability can be circumvented in favor of bifurcating to higher-energy single pulses by appropriately adjusting the group-velocity-dispersion in the fiber and the waveplate/polarizer settings in the saturable absorber. The findings may be used as a practical guideline for designing high-power lasers since the theoretical model relate directly to the experimental settings. The theoretical model is also extended to give simple descriptions of the mode-locking dynamics in multi-mode fibers as well as nonlinear crystals.

ISBN: 9781267027238Subjects--Topical Terms:

2122814
Applied mathematics.

Modeling High-Energy Temporal and Spatial Mode-Locking.
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500 $a Adviser: Jose Nathan Kutz.
502 $a Thesis (Ph.D.)--University of Washington, 2011.
520 $a Mode-locking refers to the generation of ultrashort optical pulses in laser systems. Since its first proposed use in the early 90's, the ring cavity fiber laser mode-locked by utilizing the nonlinear polarization rotation technique has become one of the most reliable and compact sources for robust ultra-short optical pulses. The pulse dynamics is dominated by the interaction of the fiber's cubic Kerr nonlinearity and chromatic dispersion with an intensity-discriminating mechanism (saturable absorption) provided by the mode-locking element(s) in the laser cavity. This intensity discrimination favors the high-intensity portions of the electric field over the low-intensity portions so that a pulse can be formed. However, due to the limitations in the energy output, these fiber lasers have lagged well behind the solid-state lasers in the key performance parameters. A comprehensive study of achieving high-energy pulses in a ring cavity laser that is passively mode-locked by a series of waveplates and a polarizer is presented in this dissertation. Specifically, it is shown that the multi-pulsing instability can be circumvented in favor of bifurcating to higher-energy single pulses by appropriately adjusting the group-velocity-dispersion in the fiber and the waveplate/polarizer settings in the saturable absorber. The findings may be used as a practical guideline for designing high-power lasers since the theoretical model relate directly to the experimental settings. The theoretical model is also extended to give simple descriptions of the mode-locking dynamics in multi-mode fibers as well as nonlinear crystals.
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