Study Of Photorefractive Adaptive Optical Heterodyne Detection Technology With Pulse Laser

The phase conjugation properties of self-pumped phase conjugation(SPPC), mutually pumped phase conjugation(MPPC), self-pumped phase conjugation and mutually pumped phase conjugation coexisting are studied with photorefractive crystal when it is pumped by pulse laser, and the dependences of the output properties of them on pump parameters of their pump beams are obtained experimentally, they are compared with the results when the photorefractive crystal is pumped by continuous laser.Based on the effect of SPPC and MPPC coexisting in the photorefractive crystal, using the new photorefractive adaptive optical heterodyne detection system, the technology of photorefractive adaptive optical heterodyne detection is studied with Ar+ laser, solid continuous laser, Q-switched single longitudinal mode pulse laser and general Q-switched pulse laser respectively, and it is indicated by experiment result and theory analysis that photorefractive adaptive optical heterodyne detection can be achieved with monochromatic continuous laser and Q-switched single longitudinal mode pulse laser,but it is difficult to obtain optical heterodyne detection for general Q-switched pulse laser because of the spectrum components of its longitudinal modes have no correlation between each other. In addition, it is proved by experiment that the photorefractive adaptive optical heterodyne detection technology put forward by this paper will have widespread potential applications in detection of weak signal transmitting in aberration medium.