摘要
为了满足超远程和高速空间激光通信的需求,设计了一种以1.06μm光纤激光4支路相控阵作为发射源的通信系统结构。采用53 Mb/s、120 Mb/s、155 Mb/s速率调制的伪随机序列,实验了相控阵种子源和一条支路处调制的2种方案。结果表明:相同速率下,种子源调制的接收眼图质量较好,通过相位控制,可以进一步提高接收质量。实验中,研究了2条支路光分别调制的相控阵多载波特性,调制信号采用5/5.08 MHz及20/40 MHz两组正弦波,经光束合成和相位控制,在接收端观测到相应的频域信号。实验初步验证了光纤激光相控阵空间通信系统的可行性。
In order to meet the needs of the ultra-long range and high speed space laser communication,a kind of communication system with the emitter utilizing a 4-beam fiber laser phased array operating at 1.06μm was designed.The seed and one of the 4beams were modulated,respectively,and the modulation rates of the pseudo-random sequence were 53Mb/s,120Mb/s and 155 Mb/s.The results show that the quality of the receiving eye diagrams quality is better with the seed directly modulation at the same rates,and the receiving eye diagrams can be further improved through controlling the phases of the beam array.In the experiment,the multi-carrier characteristics of the phased array modulated respectively at 2beams were studied.The 5/5.08 MHz and 20/40 MHz sine waves were used as the modulation signals,respectively,and the frequency domain signal can be observed at the receiving terminal after beam combination and phase controlling.Therefore,the space communication system feasibility based on the fiber laser phased array can be verified in the experiment.
出处
《应用光学》
CAS
CSCD
北大核心
2016年第6期938-941,共4页
Journal of Applied Optics
基金
国家自然科学基金(91338116)
关键词
光通信
光纤激光相控阵
调制
眼图
optical communication
optical fiber laser phased array
modulation
eye diagram
