Regrowth-free AlGaInAs MQW polarization controller integrated with a sidewall grating DFB laser  

作　　者：XIAO SUN SONG LIANG WEIQING CHENG SHENGWEI YE YIMING SUN YONGGUANG HUANG RUIKANG ZHANG JICHUAN XIONG XUEFENG LIU JOHN HMARSH LIANPING HOU 

机构地区：[1]James Watt School of Engineering,University of Glasgow,Glasgow G128QQ,UK [2]Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [3]School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China

出　　处：《Photonics Research》2023年第4期622-630,共9页光子学研究（英文版）

基　　金：Engineering and Physical Sciences Research Council(EP/R042578/1);Chinese Ministry of Education Collaborative Project(B17023)。

摘　　要：Polarization control is at the heart of high-capacity data optical communication systems,such as polarizationdivision multiplexers and Stokes vector modulation transmitters.Despite passive polarization control being mature,the realization of monolithically integrated polarization controllers and single longitudinal mode light sources,such as distributed-feedback(DFB)lasers,is of importance.In this research,we report an AlGaInAs multiple-quantum-well photonic integrated circuit device which can control the state of polarization of the output light source,consisting of a polarization mode converter(PMC),a differential phase shifter(DPS),and a sidewall grating DFB laser.We demonstrate an asymmetrical stepped-height ridge waveguide PMC to realize TE to TM polarization conversion and a symmetrical straight waveguide DPS to enable polarization rotation from approximately counterclockwise circular polarization to linear polarization.Based on the identical epitaxial layer scheme,all the PMC,DPS,and DFB lasers can be integrated monolithically using only a single step of metalorganic vapor-phase epitaxy and two steps of III-V material dry etching.For the DFB-PMC device,a high TE to TM polarization conversion efficiency(98.4%)over a wide range of DFB injection currents is reported at 1555 nm wavelength.For the DFB-PMC-DPS device,a nearly 60°rotation of the Stokes vector on the Poincarésphere was obtained with a range of bias voltage from 0 to-3.0 V at a laser drive current of 170 mA.

关 键 词：polarization waveguide ROTATION 

分 类 号：TN248[电子电信—物理电子学] TN929.1