外腔锁相中二极管列阵相邻单元间不同侧模的耦合系数  

Coupling coefficients arising from different lateral modes between emitters of a diode laser array phase locked in an external cavity

作　　者：施鹏程[1] 钱凌轩[1] 陈建国[1] 杨华[1] 陈海波[1] 

机构地区：[1]四川大学光电技术系,四川成都610064

出　　处：《激光杂志》2005年第6期23-24,共2页Laser Journal

基　　金：国家自然科学基金委员会中国工程物理研究院联合基金项目资助(批准号:10276026)

摘　　要：推导了锁相外腔中半导体激光器列阵相邻发光单元之间不同阶侧模的耦合系数,计算了耦合系数的幅度与外腔长度的关系。结果表明:幅度的极大值对应的外腔长度随侧模阶次增大而减小,不同阶次侧模耦合系数的最大幅度也随阶次降低而减小。上述结果意味着;要实现相邻单元间的基侧模耦合锁相,应该把腔长放在对应的极大值附近;同时也预示着如果腔长过短,可能会出现高阶侧模的外腔锁相。We have deduced expressions describing couplings, arising from different lateral modes, between neighboring emitters of a diode laser array （LDA）, which is positioned in an external cavity （ EC）, and calculated the relation between the amplitudes of coupling coefficients and the EC length. Results show that： the EC length corresponding with the maximum amplitude of coupling coefficient decreases as the lateral mede＇s order increases; the maximum amplitudes of coupling coefficients arising from different lateral modes also decrease as lateral modes＇ orders reduce. This result means that the EC length should be put around the maximum amplitude in order to achieve coupling and phase locking of basic lateral mode between neighboring emitters. It also indicates that if the EC length is too short, phase locking between the high order lateral mede＇s is likely to appear.

关 键 词：半导体激光器列阵 外腔 锁相 侧模 耦合系数 

分 类 号：TN248.1[电子电信—物理电子学]