Monolithically Integrated AlGaInAs MQW Polarization Mode Converter Using a Stepped Height Ridge Waveguide

IEEE Photonics Journal

Zhibo Li¹  Bocang Qiu²  Song Liang³  Yongguang Huang³  Lianping Hou⁴  Weiqing Cheng⁴  Shengwei Ye⁴  John H. Marsh⁴  Xiao Sun⁴  Jichuan Xiong⁵  Xuefeng Liu⁵ 

[1] Fraunhofer Centre for Applied Photonics, Glasgow, U.K.;Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xian, China;Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China;James Watt School of Engineering, University of Glasgow, Glasgow, U.K.;School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China;

关键词: Optical polarization;    integrated photonic systems;    waveguide devices;   

DOI  :  10.1109/JPHOT.2022.3176547

来源: DOAJ

【 摘 要 】

An AlGaInAs multiple-quantum-well (MQW) polarization mode controller (PMC) using a stepped height ridge waveguide is presented, which is monolithically integrated with a sidewall grating distributed feedback laser using quantum well intermixing (QWI). QWI is used to create a 100 nm blueshift in the PMC and to partially eliminate the anisotropy and birefringence of the MQW structure. The PMC structure is modelled and optimized using a 3D full-vectorial Finite-Element Method package. The maximum polarization conversion efficiency (PCE) is around 96% for a 537-μm-long PMC operating at a wavelength of 1550 nm. To maintain a PCE of ≥90%, the fabrication tolerances of the dry-etch corner and ridge waveguide widths are ± 0.05 μm and ± 0.03 μm respectively. The main advantages of the proposed design are that only a single step of MOPVE and two steps of dry etching are required for the whole integrated device, significantly reducing complexity and cost.

【 授权许可】

Unknown