Abstract
A new method for Q-switching an all-fiber laser is presented. It is based on induced acoustic long period grating operating on a null coupler, which acts as acoustically controlled tunable output coupler. Q-switching is achieved by switching on and off the acoustic wave in a burst mode, thereby generating laser pulses that are ~400 times shorter than the acoustically controlled coupler’s rise time. Output pulse energy of 22 μJ and temporal width of ~100 ns were measured at a wavelength of 1.54 μm.
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Berg, Y., Goldring, S., Pearl, S. et al. Q-switching an all-fiber laser using acousto-optic null coupler. Appl. Phys. B 111, 425–428 (2013). https://doi.org/10.1007/s00340-013-5351-3
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DOI: https://doi.org/10.1007/s00340-013-5351-3