Narrow vertical beam divergence angle for display applications of 645 nm lasers  

作　　者：Yufei Jia Yufei Wang Xuyan Zhou Linhai Xu Pijie Ma Jingxuan Chen Hongwei Qu Wanhua Zheng 贾宇飞;王宇飞;周旭彦;徐林海;马丕杰;陈静瑄;渠红伟;郑婉华(Laboratory of Solid State Optoelectronics Information Technology,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;College of Future Technology,University of Chinese Academy of Sciences,Beijing 101408,China;State Key Laboratory on Integrated Optoelectronics,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China)

机构地区：[1]Laboratory of Solid State Optoelectronics Information Technology,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]College of Future Technology,University of Chinese Academy of Sciences,Beijing 101408,China [4]State Key Laboratory on Integrated Optoelectronics,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China

出　　处：《Chinese Optics Letters》2021年第10期44-48,共5页中国光学快报（英文版）

基　　金：supported in part by the National Key R&D Program of China(Nos.2016YFB0401804 and 2016YFA0301102);the National Natural Science Foundation of China(Nos.91850206 and 62075213)。

摘　　要：We design a 645 nm laser diode(LD)with a narrow vertical beam divergence angle based on the mode expansion layer.The vertical beam divergence of 10.94°at full width at half-maximum is realized under 1.5 A continuous-wave operation,which is the smallest vertical beam divergence for such an LD based on the mode expansion layer,to the best of our knowledge.The threshold current and output power are 1.07 A and 0.94 W,limited by the thermal rollover for the 100μm wide and 1500μm long broad area laser,and the slope efficiency is 0.71 W/A.The low coherence device is fabricated with the speckle contrast of 3.6%and good directional emission.Such 645 nm LDs have promising applications in laser display.

关 键 词：beam divergence laser diode SPECKLE laser display 

分 类 号：TN248[电子电信—物理电子学]