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Title: Deep-red semiconductor monolithic mode-locked lasers

A deep-red semiconductor monolithic mode-locked laser is demonstrated. Multi-section laser diodes based on an AlGaAs multi-quantum-well structure were passively mode-locked, enabling the generation of picosecond optical pulses at 752 nm, at pulse repetition rates of 19.37 GHz. An investigation of the dependence of the pulse duration as a function of reverse bias revealed a predominantly exponential decay trend of the pulse duration, varying from 10.5 ps down to 3.5 ps, which can be associated with the concomitant reduction of absorption recovery time with increasing applied field. A 30-MHz-tunability of the pulse repetition rate with bias conditions is also reported. The demonstration of such a compact, efficient and versatile ultrafast laser in this spectral region paves the way for its deployment in a wide range of applications such as biomedical microscopy, pulsed terahertz generation as well as microwave and millimeter-wave generation, with further impact on sensing, imaging and optical communications.
Authors:
; ; ; ;  [1] ; ;  [2] ; ;  [3] ;  [1] ;  [4]
  1. School of Engineering, Physics and Mathematics, University of Dundee, Dundee DD1 4HN (United Kingdom)
  2. Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 (China)
  3. Key Laboratory of Opto-electronics Technology, Ministry of Education, Beijing University of Technology, Beijing 100124 (China)
  4. (United Kingdom)
Publication Date:
OSTI Identifier:
22402389
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 22; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALUMINIUM ARSENIDES; GALLIUM ARSENIDES; GHZ RANGE 01-100; MHZ RANGE 01-100; MICROSCOPY; MICROWAVE RADIATION; PULSES; QUANTUM WELLS; SEMICONDUCTOR LASERS