一种基于光差拍技术的新型频率合成器的研究  

Study on a novel frequency synthesizer based on optical heterodyne technique

作　　者：冀青[1] 马秀荣[1] 孙静[1] 

机构地区：[1]天津理工大学计算机与通信工程学院,通信器件与技术教育部工程研究中心,薄膜电子与通信器件天津市重点实验室,天津300384

出　　处：《光电子．激光》2011年第11期1625-1628,共4页Journal of Optoelectronics·Laser

基　　金：天津市自然基金重点资助项目(07JCZDJC06000);教育部重点资助项目(206006)

摘　　要：提出了一种基于光差拍技术频率合成器的设计方案,频率合成器可以实现DC～×102 GHz频率范围的梳状谱信号输出。利用10GHz光电探测器(PD)对一腔长为27m的环形腔掺铒光纤激光器输出的多纵模激光进行差拍,得到频率间隔为7.63MHz的梳状信号。受PD响应速率的影响,梳状谱信号的频率范围为DC～10GHz。在此基础上,利用可调谐带通滤波器可以选取不同频段的电信号或者进行频率组合产生其它频率成分的电信号。In this paper,a scheme of a novel frequency synthesizer based on the optical heterodyne technique is proposed. Afrequency comb with frequency range from DC to hundreds of GHz can be obtained in the frequency synthesizer proposed by us. A 10 GHz-photoelectric detector is utilized to detect the multklongitudinal-mode laser beam which is produced by a multi-longitudinal mode Er3＋-doped fiber ring laser with cavity length of 27 m,and a series of beating signals with frequency spacing of 7.63 MHz are obtained at the output port of the detector. The frequency range of the frequency comb is from DC to 10 GHz restricted by the bandwidth of the photoelectric detector,which is 10 GHz. Frequency selection and combination can be realized based on the tunable band-pass filter.

关 键 词：光差拍技术 纵模 频率合成 

分 类 号：TN929.11[电子电信—通信与信息系统]