Mirrorless, distributed-feedback, ultraviolet, tunable, narrow-linewidth, solid state laser

摘要

A mirrorless, distributed-feedback (DFB), ultraviolet, tunable, narrow-linewidth, solid state laser for remote sensing and medical applications is disclosed. Optical pumping in the DFB laser is accomplished using a frequency quadrupled, 10 Hz., Q-switched, Nd:YAG laser operating at 266 nm. The pump beam is diffracted off a grating (2400 grooves per mm.) into two parts. The two beams are subsequently recombined at the side face of the Ce:doped crystal (8 mmx8 mmx30 mm) at an angle of about 2 theta (about 81 degrees). The resulting spatially periodic excitation within the Ce-doped gain medium due to the interferring pump beams determines the operating wavelength of the DFB laser.