中国电子科技集团公司第二十九研究所， 成都 610036
卫星激光通信链路是一项实现卫星大规模星座组网的关键技术。相干激光链路灵敏度高、抗背景干扰、速率升级空间大，在星间激光链路中应用广泛。文章建立了带有前置掺铒光纤放大器(EDFA)的卫星相干激光通信终端的信噪比分析模型，仿真分析了EDFA功率增益、EDFA噪声系数、本振光功率、信号光功率、光放后端光带宽、基带前端电带宽对终端输出信噪比的影响以及各种输出噪声功率占比的情况，得到了带有前置EDFA卫星相干激光通信终端的信噪比参数特性。
卫星激光通信 相干激光通信 光纤放大器 信噪比 误码率 satellite laser communication coherent laser communication optical fiber amplifier signal to noise ratio bit error rate
Author Affiliations
Abstract
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
A complex-coefficient microwave photonic filter with continuous tunability is proposed and demonstrated, which has a compact structure and stable performance without splitting the optical path and tuning the polarization state. By only controlling the DC biases of the modulator, the amplitudes and the phases of the filter taps can both be tuned. The phase difference between the two filter taps covers a full 360° range from 10 GHz to 32 GHz. Frequency responses of the proposed filter are measured within 10–20 GHz with different center frequencies.
060.5625 Radio frequency photonics 070.2615 Frequency filtering 050.5080 Phase shift Chinese Optics Letters
2019, 17(10): 100601
