Active Q-switching in an erbium-doped fiber laser using an ultrafast silicon-based variable optical attenuator

Title
Active Q-switching in an erbium-doped fiber laser using an ultrafast silicon-based variable optical attenuator
Authors
장유민이준수전영민이주한
Keywords
q-switching; fiber laser; variable optical attenuator
Issue Date
2011-12
Publisher
Optics express
Citation
VOL 19, NO 27, 26911-26916
Abstract
Presented herein is the use of an ultrafast Si-based variable optical attenuator (VOA) as a Q-switch for rare earth-doped fiber lasers. The ultrafast VOA is based on a forward-biased p-i-n diode integrated with a ridge waveguide, which was originally designed and optimized for WDM channel power equalization in optical communication systems. By incorporating a Si-based VOA with a transient time of ~410 ns into an erbium-doped fiber-based Fabry-Perot cavity it has been shown that stable Q-switched pulses possessing a temporal width of less than ~86 ns can be readily obtained at a repetition rate of up to ~1 MHz. The laser’s peak power of ~38 W is shown to be obtainable at 20 kHz with a slope efficiency of ~21%.
URI
http://pubs.kist.re.kr/handle/201004/42105
ISSN
10944087
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KIST Publication > Article
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