<title>New mutually pumped phase conjugation with a rainbow configuration in BaTiO3:Ce crystal</title>

Abstract

A new configuration of mutually pumped phase conjugation was experimentally demonstrated using two nanosecond pulsed beams in BaTiO3:Ce crystal, in which the beams travel in a geometrical path similar to the shape of a rainbow, so we refer to this as rainbow-shaped mutually pumped phase conjugation. In this configuration the two mutually incoherent pulsed beams were incident upon the +c-face to form a coupling channel without internal reflections at crystal surfaces. The highest phase conjugate reflectivity was about 24% when two incident beams have the same intensity and highest spatial resolution was 7.12 lines/mm. The dependence of the phase conjugate reflectivity on the incident angle and distance, and the grating formation time have been investigated. The photorefractive response time to the incident intensity had a sublinear dependence with a factor of 0.7776. Additionally, we estimated also the coupling strength and the interconnecting factor between two beams to be 4.512 and 0.3242, respectively.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.