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为了提高临近空间激光通信的信噪比,避免杂散光的干扰,通常采用滤光片对信号进行过滤和采集。针对通信系统滤光片的参数要求,选择合适的薄膜材料,结合制备工艺,对膜系进行设计。采用电子束加热蒸发和离子辅助沉积技术镀制薄膜。采用与膜系评价函数和膜层敏感度相关的数学模型,优化出膜层敏感度较低的膜系,制备的滤光片满足临近空间激光通信链路光学系统的使用要求,并通过了环境测试。
In order to improve the signal-to-noise ratio of near-space laser communication and avoid the interference of stray light, filters are usually used to filter and collect signals. For communication system filter parameters, select the appropriate film material, combined with the preparation process, the design of the membrane system. Electro-beam heating evaporation and ion-assisted deposition of thin film plating technology. By using the mathematical model which is related to the evaluation function of the membrane system and the sensitivity of the membrane layer, the membrane system with lower sensitivity of the membrane layer is optimized. The prepared filter meets the requirements of the optical system of the adjacent space laser communication link and passes the environment test.