Begley R F, Goux D, Chen D W, Giat O
Perkin-Elmer Corporation, Electro-Optical Division, Danbury, Connecticut 06810, USA.
Appl Opt. 1982 Sep 1;21(17):3213-20. doi: 10.1364/AO.21.003213.
An attractive source for spaceborne laser communications is the directly modulated single-mode GaAs/GaAlAs injection laser. GaAlAs lasers, however, show low power per diode and wide beam divergence. A simple optical concept for a laser beam combiner overcomes diode laser limitations: an array of closely packed parallel collimated laser beams can be handled in an optical system as a single beam. Diffractive spreading causes all bundle beams to overlap in the far field, producing incoherent power addition with 50% power throughput and good far-field performance.
用于星载激光通信的一种有吸引力的光源是直接调制的单模 GaAs/GaAlAs 注入式激光器。然而，GaAlAs 激光器每个二极管的功率较低且光束发散角较大。一种用于激光束组合器的简单光学概念克服了二极管激光器的局限性：紧密排列的平行准直激光束阵列在光学系统中可作为单束光来处理。衍射扩展使所有束状光束在远场重叠，产生功率通过率为 50% 且具有良好远场性能的非相干功率相加。
