Active Q-switching in an erbium-doped fiber laser using an ultrafast silicon-based variable optical attenuator
- Active Q-switching in an erbium-doped fiber laser using an ultrafast silicon-based variable optical attenuator
- 장유민; 이준수; 전영민; 이주한
- q-switching; fiber laser; variable optical attenuator
- Issue Date
- Optics express
- VOL 19, NO 27, 26911-26916
- 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
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