Optical and RIN spectrum improvements in necked waveguide high-power DFB laser diode

Liu, Y., Huang, Y., Zhang, R., Hou, L. , Lu, D., Zhao, L. and Wang, W. (2022) Optical and RIN spectrum improvements in necked waveguide high-power DFB laser diode. IEEE Photonics Technology Letters, 34(5), pp. 275-278. (doi: 10.1109/LPT.2022.3150799)

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A novel high power distributed feedback (DFB) laser is proposed which uses a partially narrow waveguide and corrugation pitch modulated (CPM) phase shift grating. Compared with conventional DFB lasers with constant waveguide width, these necked DFB lasers have greater improvements in terms of optical and relative intensity noise (RIN) spectrum. They are less sensitive to external optical feedback (EOF) and increase the range of the injection current for single longitudinal mode (SLM) operation. It can not only suppress the multimode lasing state under high injection current and EOF intensity, but also realize the SLM operation with RIN < -135 dB under a EOF intensity of less than -15 dB in the current range of 150 mA ~ 350 mA. Therefore, the range of injection current for SLM operation was increased for continuous wave (CW) light sources in silicon-based hybrid photonic integration applications.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Hou, Dr Lianping
Authors: Liu, Y., Huang, Y., Zhang, R., Hou, L., Lu, D., Zhao, L., and Wang, W.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Photonics Technology Letters
ISSN (Online):1941-0174
Published Online:10 February 2022
Copyright Holders:Copyright © 2021 IEEE
First Published:First published in IEEE Photonics Technology Letters 34(5):275 - 278
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
302617Optically controlled THz phased array antennasJohn MarshEngineering and Physical Sciences Research Council (EPSRC)EP/R042578/1ENG - Electronics & Nanoscale Engineering