摘要
针对多光谱通信的需求,设计了一种光栅型光谱波分复用可见光通信光学天线。相比同类多光谱通信光学系统,该光学天线具有信道数多、增益大、效率高等优点。经过理论分析,提出了采用双柱面镜结合反射式光栅的天线结构,在光谱维保持较高的光谱分辨率,增加信道数,提高系统的通信速率;同时缩小光斑空间维的大小,提高系统的增益。仿真分析表明,该光学天线可以同时高效地对8个不同的单光谱信号进行探测接收,视场角高达18°×0.4°,增益为12.6,信噪比高达48.28 d B,天线尺寸为9 cm×12 cm。最后,根据设计仿真制作了原理样机,实验结果显示该光学天线可以清晰地分开多光谱信号并实现探测接收,信号间没有产生串扰,信噪比较高,适用于多光谱波分复用通信系统。
Based on the requirement of the wavelength division multiplex communication, an optical antenna is designed. Compared with the similar spectral communication system, the antenna has the advantages of large number of channels, large optical gain, high efficiency, etc. After theoretical analysis, the structure of double cylinder mirror with reflecting grating is proposed, which can not only maintain high spectral resolution at spectral dimension and improve the system＇ s communication rate, but also decrease the spot size at spatial dimension and increase the optical gain of the system. The simulation results show that the antenna can receive eight kinds of different single spectrum signals efficiently.The field of view reaches 18°×0.4°, the optical gain is 12.6, the optical signal-to-noise ratio achieves 48.28 dB and the size of the optical antenna is 9 cm×12 cm. At last, a prototype based on the design is produced, and the experiments show that the antenna can receive the multi-spectrum signal efficiently and the signal noise rate（SNR） is high enough for wavelength division multiplexing （WDM） optical communication.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2016年第2期40-48,共9页
Acta Optica Sinica
基金
国家973计划(2013CB329202)
国家自然科学基金(61571067)
关键词
光通信
光学天线
光栅
增益
optical communications
optical antenna
grating
gain
