基于延时零拍法的DFB光纤激光器线宽测量  

Measurement of the Linewidth of DFB Fibre Laser Based on the Delayed Self-homodyne

作　　者：王劲文[1] 董小鹏[1] 周金龙[1] 

机构地区：[1]厦门大学信息科学与技术学院光波技术研究所,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2007年第3期322-325,共4页Journal of Xiamen University：Natural Science

基　　金：福建省自然科学基金(A0010004)资助

摘　　要：DFB单频光纤激光器输出的超窄线宽作为光学系统中的一个重要参数需要进行准确的测定,因此,采用延时零拍法重点对1053 nm波长的DFB掺Yb3+光纤激光器的超窄线宽进行了测量,并且研究了差拍光电流谱线的输出特性.针对超窄线宽DFB光纤激光器输出的特点设计了相应的光电转换放大电路,测得1053 nm的DFB光纤激光器的线宽为31 kHz.该测量结果对于窄线宽DFB光纤激光器应用于光纤传感、光纤通信领域具有一定的指导意义.As an important parameter in the laser system, the narrow linewidth of DFB fibre laser must be measured accurately. Therefore, the linewidth of a Yb^3＋ doped DFB fibre laser was measured with the delayed self-homodyne detection method in the present work. Meanwhile the characteristics of the frequency spectrum of the laser beat signal was studied, and the sensitivity, stability and frequency responsivity of the signal detection circuit used in the experiment were analyzed. The measured linewidth of the 1 053 nm DFB fiber laser is of 31 kHz, in agreement with the theoretical analysis. Furthermore, the results based on the delayed self-homodyne method are valuable for applications of DFB fibre laser in the field of optical fibre sensor and optical communication.

关 键 词：DFB光纤激光器 零拍法 线宽测量 光纤延时 

分 类 号：TN247[电子电信—物理电子学] TN248