Diffraction limited output from a CW Nd: YAG MOPA with a fibre phase conjugate SBS mirror

Valeri I. Kovalev, Robert G. Harrison

Research output: Contribution to journalArticlepeer-review


Phase conjugation in a master oscillator/power amplifier (MOPA) configuration, for used in single pulse or pulse-periodic regimes, is discussed. The first demonstration of beam clean up in a CW Nd:YAG MOPA system based on this technique is reported. The MOPA system comprises a four-pass amplifier configuration and a fiber phase conjugate SBS mirror. The CW ring-cavity master oscillator is operated in a single transverse and longitudinal mode. For high gain operation, the efficiency of pump power conversion to medium population inversion is increased and the conversion of pump into heat is simultaneously decreased. This may be achieved using diode, instead of lamp pumping, which for Nd:YAG increases the gain by a factor of three.

Original languageEnglish
Pages (from-to)912-913
Number of pages2
JournalIEEE Lasers and Electro-Optics Society Annual Meeting
Publication statusPublished - 1999
EventProceedings of the 1999 12th Annual Meeting IEEE Lasers and Electro-Optics Society (LEOS'99) - San Francisco, CA, USA
Duration: 8 Nov 199911 Nov 1999


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