采用级联原子滤光器的新型卫星激光链路系统研究

A Novel Inter-Satellite Laser Link System with Linked Atomic Optical Filter

提出级联佛克脱型原子滤光器(LinkedVADOF)的新构想。从理论上分析并计算了级联佛克脱型原子滤光器的透射谱。结果表明,级联佛克脱型原子滤光器将佛克脱型原子滤光器的多峰改造为单峰结构,具有比佛克脱型原子滤光器更窄的线宽和更高的噪声抑制比。将这种新型结构应用于激光信标锁频。该锁频方案提高了信标光频率的稳定性。在此基础上,给出了发射端采用级联佛克脱型原子滤光器锁频,接收端采用法拉第型原子滤光器(FADOF)滤光的新型卫星激光链路系统。外场初步联调实验表明了该系统的可行性。

A new idea of linked Voigt anomalous dispersion optical filter (VADOF) is prenserted. Its transmission spectrum is analyzed and calculated. The result shows that, compared with VADOF, the linked VADOF changes the multi-peak configuration of VADOF into single-peak one and has narrower bandwidth and higher noise rejection ratio. The linked VADOF is applied into a new laser frequency-locking scheme, which improves the stability of laser frequency. Consequently, a novel inter-satellite laser link system using linked VADOF for frequency locking in the transmitter and Faraday anomalous dispersion optical (FADOF) for radiation rejection in the receiver is given. The result of field test demonstrates that this novel system is feasible.