A pulsed master oscillator power amplifier system is constructed using a double-cladding polarized Yb-doped fiber and an all-fiber Q-switched narrow-linewidth pulsed laser used as seed laser. This system has a high repetition rate and provides a nanosecond pulsed laser with a narrow linewidth and linear polarization. Moreover, it generates amplified radiation with up to 14 W of average power, narrow linewidth (full-width at half-maximum is smaller than 0.12 nm), linear polarization at 1 080-nm wavelength, repetition rate of 51 kHz, and pulse duration of approximately 50 ns. Based on this pulsed amplified radiation, 3.5 W of green laser, with an optical-to-optical efficiency of 27.3%, is obtained via single-pass frequency doubling using a noncritical phase matching KTP crystal.
© 2012 Chinese Optics Letters
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.2420) Fiber optics and optical communications : Fibers, polarization-maintaining
(140.3515) Lasers and laser optics : Lasers, frequency doubled
Fiber Optics and Optical Communications
Wendi Wu, Tingqi Ren, Jun Zhou, Songtao Du, and Xia Liu, "Frequency doubling of narrow-linewidth pulsed fiber laser," Chin. Opt. Lett. 10, 050604- (2012)