The investigation of compound YAG phase-conjugate resonator

How to improve the quality of output beam of phase-conjugation cavity is a problem. And there are a few reports on how to improve the quality of output beam mode [1]. On this paper, the output characteristic of compound phase-conjugate resonator was reported. The experiment results indicated that it has high output energy and excellent mode. The output energy is 7.4 mJ, and the width of it is about 15 ns. The results of pulse widths and output energies and beam profiles were given and it indicates that using the compound cavity is a useful and easy method to improve the quality of beam mode.