1.06 mu m optically addressable liquid crystal spatial light modulator for an 'HV target' of the indoor laser radar system

摘要

Research and development project of an indoor laser radar communication system has been going on to establish one of wireless communication etwork environments. In the project, corner-reflecting laser communicating target "the Hyper Versatile (HV) target", is used for a free-space laser data communicatioln with low power consumption and for accurate position detection of the target. Rfelective-type Liquid Crystal Spatial Light Modulator (LC SLM) is a possible attractive component of the HV target to solve the above subjects. The indoor laser radar system should operate at eye-safe wavelength region, however, no infrared operating SLM has been released becasue conventional SLMs have been designed and manufactured only for visible light operations. In this paper, infrared (1.06 mu m) operating Parallel aligned nenmatic Liquid-crystal Spatial Light Modulator (PAL-SLM) is described for an application for the indoor laser radar system. Characteristics of the SML and numerical simulations for corner-reflecting operation are indicated.