Q-switching an all-fiber laser using acousto-optic null coupler
نویسندگان
چکیده
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 lJ and temporal width of *100 ns were measured at a wavelength of 1.54 lm.
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