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15 October 2012 Single-frequency gain-switched Ho-doped fiber laser
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We demonstrate a single-frequency gain-switched Ho-doped fiber laser based on heavily doped silicate glass fiber fabricated in house. A Q-switched Tm-doped fiber laser at 1.95μm was used to gain-switch the Ho-doped fiber laser via in-band pumping. Output power of the single-frequency gain-switched pulses has been amplified in a cladding-pumped Tm-Ho-codoped fiber amplifier with 1.2m active fiber pumped at 803nm. Two different nonlinear effects, i.e., modulation instability and stimulated Brillouin scattering, could be seen in the 10μm-core fiber amplifier when the peak power exceeds 3kW. The single-frequency gain-switched fiber laser was operated at 2.05μm, a popular laser wavelength for Doppler lidar application. This is the first demonstration of this kind of fiber laser.
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Jihong Geng, Q. Wang, T. Luo, B. Case, S. Jiang, Farzin Amzajerdian, and Jirong Yu "Single-frequency gain-switched Ho-doped fiber laser", Proc. SPIE 8519, Nanophotonics and Macrophotonics for Space Environments VI, 85190N (15 October 2012);

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