Single-frequency 1.25 W monolithic lasers at 1123 nm.

Experimental investigation ofd Nd:YAG monolithic nonplanar ring lasers operated at 1123 nm wavelength is presented. Stable single-frequency 1123 nm laser output has been obtained with successful suppression of the strong 1064 nm radiation. Single-frequency output power of 1.

[Studies on the hyperfine structures of I2 absorption line with third harmonic frequency stabilization in Nd:YVO4-KTP ring laser].

The experiment for research on the hyperfine structure of I2 absorption lines with third harmonic frequency stabilization in Nd: YVO4-KTP ring laser has been done. The hyperfine structures of two lines have been observed and the results are comparable with the theoretical calculations. One of the two lines is R(70) 36-1 is the transition of the excited state.

Relaxed alignment tolerance of monolithic ring lasers.

An investigation of relaxed alignment tolerance in monolithic ring lasers is presented. It was found that the relaxed alignment tolerance is strongly dependent on the out-of-plane angle. A preferred region for the out-of-plane angle is proposed.