外腔长度变化对光纤光栅外腔LD激射波长的影响  

Influence of external cavity length variation on the lasing wavelength of the fiber grating external cavity semiconductor laser

作　　者：周寒青[1] 夏光琼[1] 邓涛[1] 吴正茂[1] 

机构地区：[1]西南师范大学物理学院,重庆400715

出　　处：《激光技术》2005年第5期476-477,490,共3页Laser Technology

基　　金：教育部科学技术重点资助项目(03140);重庆市应用基础研究资助项目(2003-7983)

摘　　要：密集波分复用(DWDM)光纤通信系统对光源的波长稳定性有很高的要求。主要就可供DWDM系统选用的光源之一光纤光栅外腔半导体激光器(FGESL)的波长稳定性进行讨论。通过计及半导体激光器(LD)、外腔及光纤光栅(FG)三者的共同作用,根据光纤光栅外腔半导体激光器的相位条件确定FGESL的激光纵模分布后,理论上研究了FGESL的激射波长随FG外腔长度的变化。结果表明,外腔较短时,外腔长度的微小变化可以导致FGESL的激射波长产生显著的变化;外腔较长(大于10 cm)时,外腔长度的变化对FGESL的激射波长基本没有影响。The development of the dense wavelength division multiplexing （DWDM） technology requires that the lasing wavelength of the light source have high accuracy and stability. The lasing wavelength stability of the fiber grating external cavity semiconductor lasers （FGESLs） is focused on. After taking into account the joint contribution of semiconductor laser, external cavity and fiber grating （FG） to the phase condition, the mode distribution of the FGESLs can be determined. As a result, the effect of the FG external cavity length on the lazing wavelength of the FGESL is investigated theoretically. Numerical simulations show that for a relative short external cavity, a slight change of the external cavity length will result in an obvious variation of the lasing wavelength; and for a long external cavity （ 〉 10cm） ,the change of the external cavity length gives almost no effect on the lazing wavelength.

关 键 词：光纤通信 光纤光栅外腔半导体激光器 激射波长 外腔长度 

分 类 号：TN248.4[电子电信—物理电子学]