Q-SWITCHED FIBER LASER WITH CONTROLLABLE OUTPUT SPECTRUM
A. G. Kuznetsov
Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences,
pr. Akademika Koptyuga 1, Novosibirsk, 630090 Russia
Keywords: fiber laser, Q-switching, active fibers, self-phase modulation, frequency doubling
Abstract
This paper reviews studies of the possibility of controlling the output spectrum of Q-switched fiber lasers. Various laser configurations for producing output radiation with characteristics optimized for specific applications, such as high-power pulses for micromachining of materials, probe pulses in fiber-optic sensor systems, etc., are considered. The mechanism of broadening of the lasing line is elucidated, and methods for controlling the output spectrum in Q-switched all-fiber lasers are described. Frequency tuning in the amplification line and generation of higher harmonics in nonlinear crystals are considered.
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