Role of resonant refractive-index grating in a nonreciprocal Nd:YAG self-pumped phase conjugator
Oleg L. Antipov, Dmitry V. Chausov, Vladimir V. Yarovoy
We have studied both experimentally and numerically the role of resonant refractive index gratings in a self-pumped phase conjugate mirror based on an Nd:YAG amplifier with nonreciprocal feedback loop. In experiment the generation of the phase-conjugating laser was delayed with respect to recording of a holographic nonlinear mirror by an external beam. An increase in the phase-conjugate reflectivity at a delay time of about 3 microseconds was measured. The numerical calculation confirmed the additional contribution of the resonant refractive-index grating, which is formed in the pumped Nd:YAG crystal due to excitation of a higher-lying level of Nd3+ ions, to efficiency of phase conjugation.
Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Mar 2, 2001•0 citations