基于锁相环芯片的锁模激光器稳频方法  

Method of Frequency Stabilization of Mode-Locked Laser Based on Phase-locked Loop Chip

作　　者：向坤[1] 吴虹[1] 陈乐[1] 李子彧[1] 田旭生[1] 林鹏[1] 

机构地区：[1]南开大学电子信息与光学工程学院,天津300071

出　　处：《南开大学学报（自然科学版）》2014年第3期102-106,共5页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：高等学校博士学科点专项科研基金(20110031110028);天津市应用基础与前沿技术研究计划重点项目(13JCZDJC26000)

摘　　要：提出了一种基于锁相环芯片的方法对作为光源的锁模激光器脉冲重复频率进行锁定,以提高射频拉远系统中光纤链路传输信号的频率稳定度.在分析了由锁相环芯片和锁模激光器构成的锁相环模型的基础上,分别设计和制作了工作于100 MHz和900 MHz的稳频电路,并在实验室环境下对脉冲重复频率约为100 MHz的锁模激光器进行了测试.测试表明,脉冲重复频率的频率稳定度可达到10^(-11),并且工作于900 MHz的稳频电路性能优于100 MHz.可以利用集成度较高的锁相环芯片,简单高效地提高锁模激光器的频率稳定度.A method based on phase-locked loop（PLL） chip is proposed to improve the frequency stability of the signal transferred in the fiber link of radio remote system. It achieves the goal of phase-locking the pulse repetition frequency of the mode-locked laser used as the optical source. The analysis of the phase-lockedloop model consisting of phase-locked loop chip and mode-locked laser is conducted. And the frequency stabilization circuit working at 100 MHz and 900 MHz are separately designed and fabricated. Meanwhile, the mode-locked laser with a pulse repetition frequency of approximately 100 MHz is tested in the laboratory. It is proved in the experiment that the frequency stability could reach 10^-11 and the circuit working at 900 MHz performs better than that of the 100 MHz. Therefore, this method is able to enhance the frequency stability of the mode-locked laser effectively making use of highly integrated phase-locked loop chip.

关 键 词：锁相环 锁模激光器 频率稳定度 

分 类 号：TN913.7[电子电信—通信与信息系统]