Design and simulation of resonant-periodic-gain cavity high-speed VCSELs and carrier transport influence on their modulation characteristics
Year: 2025
Type: article
Abstract: We demonstrate a high-speed vertical-cavity surface-emitting laser (VCSEL) design that has a resonant-periodic-gain (RPG) active region and 1λ optical length cavity.We have developed a simulation model for the high-frequency modulation of a VCSEL based on the rate equation theory.Both λ/2 cavity and 1λ RPG cavity VCSELs are in good agreement with the calculation results of our optimization model.The optical confinement factor, oxide aperture, escape and capture lifetime of carriers, p-doped distributed Bragg reflector (p-DBR) reflectivity and photon lifetime, and gain suppression coefficient are all taken into consideration.Their effects on the modulation frequency response characteristics of devices are analyzed.The 3 dB resonant frequency response bandwidth of this VCSEL can reach ∼60 GHz at an 11 mA bias current.Our advanced cavity design, in conjunction with the simulation model, offers valuable insights into enhancing the high-speed modulation performance of VCSELs.
Source: Chinese Optics Letters
Authors: Jian Feng, Hui Li, Wei Miao, Shaochi Pan, Bin Wang, Zhao Chen, Xing Zhang, Chuyu Zhong, Shupeng Deng, Shihao Ding, Jinlong Lu, Nannan Li, Yanjing Wang, Cunzhu Tong, Cunzheng Ning
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W7114911749