Author(s): Luo, XC (Luo, Xi-chen); Chen, C (Chen, Chao); Ning, YQ (Ning, Yong-qiang); Zhang, X (Zhang, Xing); Qiu, C (Qiu, Cheng); Chen, JQ (Chen, Jia-qi); Yin, XJ (Yin, Xiao-jie); Qin, L (Qin, Li); Wang, LJ (Wang, Li-jun)

Source: OPTICS EXPRESS Volume: 29 Issue: 21 Pages: 33109-33120 DOI: 10.1364/OE.431341 Published: OCT 11 2021

Abstract: We demonstrate a high linear polarization, narrow linewidth hybrid laser composed of a semiconductor gain chip and a high birefringence waveguide Bragg grating (WBG). The laser operates in the C-band, and a maximum output power of 8.07 mW is obtained in the fiber waveguide. With careful temperature tuning, the hybrid laser can operate in a single longitudinal mode state from above the threshold current to 410 mA. The side mode suppression ratio (SMSR) reaches a value of 50.2 dB, and the polarization extinction ratio exceeds 39.6 dB. We numerically analyze the linewidth suppression for the Bragg grating based on adiabatic chirp theory. The hybrid laser shows a narrow linewidth of 4.15 kHz and a low relative intensity noise (RIN) of <-155 dBc/Hz, providing a high-performance light source for coherent light communication. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Accession Number: WOS:000708940500032

ISSN: 1094-4087

Full Text: https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-29-21-33109&id=459983