Mode locking at terahertz frequencies using a distributed Bragg reflector laser with a sampled grating

Hou, L. , Haji, M. and Marsh, J.H. (2013) Mode locking at terahertz frequencies using a distributed Bragg reflector laser with a sampled grating. Optics Letters, 38(7), pp. 1113-1115. (doi: 10.1364/OL.38.001113)

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We present a highly reproducible method of producing terahertz (THz) optical pulses using a class of mode-locked AlGaInAs/InP laser operating in the 1.55 μm wavelength range. The device uses a sample grating distributed Bragg reflector to provide strong frequency selectivity at the mode-locked frequency while the distributed reflectors relax the fabrication tolerances and ensure the cavity can self adjust to being an integral number of mode-locked periods in length. The measured devices provide nearly transform-limited pulse trains at 640 GHz or 1.28 THz with a high degree of controllability and operate with consistent performance over a wide range of drive conditions. Being low cost and compact sources of THz radiation, these lasers will open up many applications, including systems for high-speed optical communication and THz imaging.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Marsh, Professor John and Hou, Dr Lianping and Haji, Dr Mohsin
Authors: Hou, L., Haji, M., and Marsh, J.H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Optics Letters
Publisher:Optical Society of America
ISSN (Online):1539-4794

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
453111High power, high frequency mode-locked semiconductor lasersAnn BryceEngineering & Physical Sciences Research Council (EPSRC)EP/E065112/1ENG - ENGINEERING ELECTRONICS & NANO ENG