Single-lobed Near Diffraction-limited Beam from 1W Laser Diode Array with an External Cavity

作     者：HONG Zhi CHEN Jun (State Key Laboratory of Modern Optical Instrumentation, Zhejiang University,Hangzhou 310027, China) A.Hermerschmidt F.Wang H.J.Eichler (Optical Institute, Technical University of Berlin, 10623 Berlin, Germany) 

作者机构：浙江大学 现代光学仪器国家重点实验室 浙江 杭州 310027 德国柏林工业大学光学所 德国 柏林 10623 

出 版 物：《Chinese Journal of Lasers》 (中国激光(英文版))

年 卷 期：2001年第10卷第6期

页      面：2-6页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：theNationalNaturalScienceFoundationofChina (6 0 0 780 0 2 ) 

主　　题：external cavity spatial coherence laser diode array 

摘      要：An external cavity for the laser diode array with a conventional mirror in what we call two-time self-injection operation is presented. The external cavity consists of two lenses, a flat external mirror(EM) in the image plane of the array and a prism that is used as an output coupler. The single-lobed near diffraction-limited far field beam of a 1 W 10-stripe gain-guided LD array lies at 6.4°～9° with the external cavity operation in two-time self-injection mode, whereas at 2.5°～3.0° for its normal feedback operation. The width of the far field beam (FWHM) is 0.43° and 0.63° at driving current of 2 and 3.2 ×I thr , respectively, much narrower than that in normal feedback operation, but at the expense of lower output power. The output of the system is very stable and insensitive to the tilt and position of the EM.