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Title: Widely tunable terahertz source based on intra-cavity frequency mixing in quantum cascade laser arrays

We demonstrate a compact monolithic terahertz source continuously tunable from 1.9 THz to 3.9 THz with the maximum peak power output of 106 μW at 3.46 THz at room temperature. The source consists of an array of 10 electrically tunable quantum cascade lasers with intra-cavity terahertz difference-frequency generation. To increase fabrication yield and achieve high THz peak power output in our devices, a dual-section current pumping scheme is implemented using two electrically isolated grating sections to independently control gain for the two mid-IR pumps.
Authors:
; ; ; ;  [1] ;  [1] ;  [2]
  1. Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
22483108
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 26; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CONTROL; FABRICATION; FREQUENCY MIXING; GRATINGS; LASERS; PEAK LOAD; PUMPING; PUMPS; TEMPERATURE RANGE 0273-0400 K; YIELDS