THz Repetition Frequency Mode-Locked Laser Using Novel Sampled Gratings

Hou, L. , Tang, S. and Marsh, J. H. (2017) THz Repetition Frequency Mode-Locked Laser Using Novel Sampled Gratings. In: Conference on Lasers and Electro-Optics/Europe and the European Quantum Electronics Conference, Munich, Germany, 25-29 June 2017, ISBN 9781509067367 (doi: 10.1109/CLEOE-EQEC.2017.8086379)

Abstract

Conventional sampled grating distributed-Bragg-gratings (C-SGDBRs) are widely used in tunable DBR lasers [1], and more recently have been used to precisely control the wavelength spacing in arrays of DBR lasers for use in WDM systems [2], and as the reflectors in THz repetition frequency (Fr) semiconductor mode locked lasers (SMLLs) [3]. However, the effective coupling coefficient, κ, of a C-SGDBR (Fig. 1(a)) is necessarily reduced substantially from that of a uniform grating because much of the sampled grating period has no grating. Here, for the first time, we apply a combination of π-phase shifted gratings, previously demonstrated in fiber lasers [4], with the C-SGDBR technique to THz repetition frequency SMLLs. Using a single electron beam lithography (EBL) step we have demonstrated a 620 GHz side-wall SGDBR MLL with an increased effective κ.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Marsh, Professor John and Tang, Mr Song and Hou, Dr Lianping
• Authors: Hou, L., Tang, S., and Marsh, J. H.
• College/School: College of Science and Engineering > School of Engineering; College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• ISBN: 9781509067367
• Copyright Holders: Copyright © 2017 Crown
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher

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