Dual-wavelength DFB laser array based on sidewall grating and lateral modulation of the grating coupling coefficient

Yuan, B. et al. (2023) Dual-wavelength DFB laser array based on sidewall grating and lateral modulation of the grating coupling coefficient. Journal of Lightwave Technology, 41(9), pp. 2775-2784. (doi: 10.1109/JLT.2023.3237601)

Abstract

A monolithic dual-wavelength DFB laser array based on sidewall gratings and a novel modulation of the grating coupling coefficient is proposed and demonstrated experimentally. The grating coupling coefficient distribution along the cavity is modulated by changing the alignment between the gratings on the two sidewalls. The frequency difference between the two lasing modes can be modulated by changing the cavity length and grating recess depth. A series of microwave signals in the range of 50 GHz to 59 GHz is observed after beating the two optical lines in a photodetector. The measured optical linewidths are 250 kHz and 850 kHz when the cavity length is 1200 μm and 1000 μm, respectively.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Sun, Yiming and FAN, YIZHE and Cheng, Weiqing and Marsh, Professor John and Sun, Xiao and Yuan, Bocheng and Hou, Dr Lianping and Wang, Dr Jue and Ye, Dr Shengwei
• Authors: Yuan, B., Fan, Y., Ye, S., Zhang, Y., Sun, Y., Sun, X., Cheng, W., Liang, S., Huang, Y., Zhang, R., Wang, J., Marsh, J. H., and Hou, L.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Journal of Lightwave Technology
• Publisher: IEEE
• ISSN: 0733-8724
• ISSN (Online): 1558-2213
• Published Online: 17 January 2023
• Copyright Holders: Copyright © 2023 IEEE
• First Published: First published in Journal of Lightwave Technology 41(9) 2775-2784
• Publisher Policy: Reproduced with the permission of the Publisher

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
302617		Optically controlled THz phased array antennas	John Marsh	Engineering and Physical Sciences Research Council (EPSRC)	EP/R042578/1	ENG - Electronics & Nanoscale Engineering