Photonics, Vol. 11, Pages 1080: A Widely and Continuously Tunable Single-Mode Transmitter Based on a Hybrid Microcavity Laser

Photonics, Vol. 11, Pages 1080: A Widely and Continuously Tunable Single-Mode Transmitter Based on a Hybrid Microcavity Laser

Photonics doi: 10.3390/photonics11111080

Authors: Miao-Qing Wang Bin Zhang Zhen-Ning Zhang You-Zeng Hao Zun-Hao Hu Yue-De Yang Jin-Long Xiao António L. Teixeira Yong-Zhen Huang

A method for achieving the single-mode and efficient unidirectional emission of a whispering gallery mode (WGM) semiconductor laser is presented herein. Hybrid square-rectangular lasers (HSRLs) and hybrid square/rhombus-rectangular lasers (HSRRLs) consisting of a Fabry–Pérot (FP) cavity and a square or rhombus cavity microcavity are described. In addition, a transmitter optical subassembly (TOSA) based on an HSRRL chip was fabricated, which has a wide and continuous wavelength tuning range. Wavelength channels from 1555.75 nm to 1568.15 nm with a spacing of 50 GHz were demonstrated with a good side mode suppression ratio (SMSR) and good output power. These devices have the potential to meet the typical requirements of optical communication networks.