Regrowth-free AlGaInAs MQW polarization controller integrated with sidewall grating DFB laser
Abstract
We report an AlGaInAs multiple quantum well integrated source of polarization controlled light consisting of a polarization mode converter PMC, differential phase shifter(DPS), and a side wall grating distributed-feedback 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 of the PMC, DPS, and DFB laser 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% over a wide range of DFB injection currents is reported at 1555 nm wavelength. For the DFB-PMC-DPS device, a 60 degree rotation of the Stokes vector was obtained on the Poincar\'e sphere with a range of bias voltage from 0 V to -4.0 V at IDFB is 170 mA.
Cite
@article{arxiv.2211.03577,
title = {Regrowth-free AlGaInAs MQW polarization controller integrated with sidewall grating DFB laser},
author = {Xiao Sun and Song Liang and Weiqing Cheng and Shengwei Ye and Yiming Sun and Yongguang Huang and Ruikang Zhang and Jichuan Xiong and Xuefeng Liu and John H. Marsh and Lianping Hou},
journal= {arXiv preprint arXiv:2211.03577},
year = {2022}
}
Comments
arXiv admin note: text overlap with arXiv:2210.10519