The obvious influence of the internal photoinduced electric field on the formation of self-pumped phase conjugation in doped (K0.5Na0.5)0.2(Sr0.75Ba0.25)0.9Nb2O6 crystals has been investigated with intermittent and continuous laser beams. An analysis is given that involves the migration of charge carriers driven by the photovoltaic (PV) and the pyroelectric (PY) electric field. Deviation from the optimal state of energy transfer owing to the PV effect and the self-adjusting of holograms owing to the PY field are the two important dominant processes in the self-pumped phase conjugator. The influence of the photoinduced electric field on the conjugation fidelity and the stability of the phase-conjugate output is also observed and analyzed. The bump feature of the two-wave mixing and the oscillating situation of the self-pumped phase conjugator are observed and are explained in view of the photoinduced internal field.
© 1996 Optical Society of America
Original Manuscript: February 26, 1996
Revised Manuscript: April 12, 1996
Published: November 1, 1996
Jingwen Zhang, Huimin Liu, and Weiyi Jia, "Influence of the internal photoinduced electric field on the formation of self-pumped phase conjugation in doped (K0.5Na0.5)0.2(Sr0.75Ba0.25)0.9Nb2O6 crystals," Appl. Opt. 35, 6241-6248 (1996)