L. Mager et al., HIGH-QUALITY SELF-PUMPED PHASE-CONJUGATION OF NANOSECOND PULSES AT 532 NM USING PHOTOREFRACTIVE BATIO3, Optics letters, 19(19), 1994, pp. 1508-1510
We implement a feedback loop oscillator, using a BaTiO3 crystal that p
rovides stable high-quality phase conjugation for nanosecond pulses, w
ith an efficiency close to the theoretical maximum.