Yaqoob Z, Rizvi A A, Riza N A
Appl Opt. 2001 Dec 10;40(35):6425-38. doi: 10.1364/ao.40.006425.
A wavelength-multiplexed optical scanning scheme is proposed for deflecting a free-space optical beam by selection of the wavelength of the light incident on a wavelength-dispersive optical element. With fast tunable lasers or optical filters, this scanner features microsecond domain scan setting speeds and large- diameter apertures of several centimeters or more for subdegree angular scans. Analysis performed indicates an optimum scan range for a given diffraction order and grating period. Limitations include beam-spreading effects based on the varying scanner aperture sizes and the instantaneous information bandwidth of the data-carrying laser beam.
提出了一种波长复用光学扫描方案，通过选择入射到波长色散光学元件上的光的波长来偏转自由空间光束。借助快速可调谐激光器或光学滤波器，该扫描仪具有微秒级的扫描设置速度以及用于亚度角扫描的几厘米或更大的大口径孔径。所进行的分析表明了给定衍射级和光栅周期的最佳扫描范围。其局限性包括基于变化的扫描仪孔径尺寸的光束扩展效应以及携带数据的激光束的瞬时信息带宽。
