1.5 μm dual-lateral-mode distributed Bragg reflector laser for terahertz excitation  

作　　者：张莉萌 余力强 潘碧玮 陆丹 潘教青 赵玲娟 

机构地区：[1]Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Science, and Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices

出　　处：《Chinese Optics Letters》2016年第1期70-74,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 61335009, 61274045, 61271066, 61321063);the National 973 Project of China (No. 2011CB301702);the National 863 Project of China (No. 2013AA014202)

摘　　要：A terahertz excitation source based on a dual-lateral-mode distributed Bragg reflector （DBR） laser working in the 1.5 μm range is experimentally demonstrated. By optimizing the width of the ridge waveguide, the fundamental and the first-order lateral modes are obtained from the laser. The mode spacing between the two modes is 9.68 nm, corresponding to a beat signal of 1.21 THz. By tuning the bias currents of the phase and DBR sections, the wavelengths of the two modes can be tuned by 2 nm, with a small strength difference （〈5 dB） and a large side-mode suppression ratio （SMSR 〉 45 dB）.A terahertz excitation source based on a dual-lateral-mode distributed Bragg reflector （DBR） laser working in the 1.5 μm range is experimentally demonstrated. By optimizing the width of the ridge waveguide, the fundamental and the first-order lateral modes are obtained from the laser. The mode spacing between the two modes is 9.68 nm, corresponding to a beat signal of 1.21 THz. By tuning the bias currents of the phase and DBR sections, the wavelengths of the two modes can be tuned by 2 nm, with a small strength difference （〈5 dB） and a large side-mode suppression ratio （SMSR 〉 45 dB）.

关 键 词：Bragg reflectors Distributed Bragg reflectors Laser excitation REFLECTION Ridge waveguides 

分 类 号：TN248[电子电信—物理电子学] O451[理学—无线电物理]