Dual-wavelength DFB Laser Based on Four Phase-shifts Sections and Equivalent Chirp Technology for Millimeter-wave Generation

Yuan, B., Fan, Y., Zhu, S., Zhang, Y., Marsh, J. H. and Hou, L. (2023) Dual-wavelength DFB Laser Based on Four Phase-shifts Sections and Equivalent Chirp Technology for Millimeter-wave Generation. In: CLEO/Europe-EQEC 2023, Munich, Germany, 26 - 30 June 2023, ISBN 9798350345995 (doi: 10.1109/CLEO/Europe-EQEC57999.2023.10232082)

Abstract

A monolithic dual-wavelength DFB laser based on four phase-shift (4PS) sampling sections and equivalent chirp technology is proposed and experimentally demonstrated. Dual-wavelength lasing is achieved by introducing two π phase shifts at positions 1/3 and 2/3 along the length of the DFB laser cavity [1]. Compared to conventional sampled Bragg gratings, the 4PS sampling structure has a higher grating coupling coefficient, κ , for the +1 st channel, with κ equal to 0.9 times that of a uniform seed grating [2], [3]. Meanwhile, the equivalent chirp technology is applied by linearly modulating the sampling periods along the DFB cavity, thus ensuring the peaks in the photon distributions of the two lasing modes at separate locations along the cavity. Consequently, mode competition between the two modes can be largely suppressed [1]. An electro-absorption modulator (EAM) section is also integrated with the DFB laser to enhance the phase locking between the two lasing modes. Furthermore, the device is based on sidewall grating, which needs only one metalorganic vapor-phase epitaxy (MOVPE) step and one III-V material dry etching step, simplifying the device fabrication process.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Yuan, Bocheng and Hou, Dr Lianping and ZHU, Simeng and FAN, YIZHE and Marsh, Professor John
• Authors: Yuan, B., Fan, Y., Zhu, S., Zhang, Y., Marsh, J. H., and Hou, L.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• ISSN: 2833-1052
• ISBN: 9798350345995
• Copyright Holders: Copyright: © 2023 IEEE
• First Published: First published in 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
• Publisher Policy: Reproduced in accordance with the publisher copyright policy

Related URLs

• Organisation
• Publisher