Multi‐Watt high‐power THz frequency quantum cascade lasers. Issue 12 (1st June 2017)

• Record Type: Journal Article
• Authors: Li, L.H.; Chen, L.; Freeman, J.R.; Salih, M.; Dean, P.; Davies, A.G.; Linfield, E.H.
• Is Part Of: Electronics letters. Volume 53:Issue 12(2017)
• Page Start: 799
• Page End: 800
• Publication Date: 2017-06-01
• Subjects: quantum cascade lasers -- surface plasmons -- optical pulse generation -- laser modes; quantum cascade lasers -- surface‐plasmon waveguide -- optical collection efficiency -- absorption -- cryostat polyethylene window -- temperature 132 K -- temperature 10 K -- temperature 77 K -- size 24 mum; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2017.0662
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : Multi‐Watt high‐power terahertz (THz) frequency quantum cascade lasers are demonstrated, based on a single, epitaxially grown, 24‐μm‐thick active region embedded into a surface‐plasmon waveguide. The devices emit in pulsed mode at a frequency of ∼4.4 THz and have a maximum operating temperature of 132 K. The maximum measurable emitted powers from a single facet are ∼2.4 W at 10 K and ∼1.8 W at 77 K, with no correction being made for the optical collection efficiency of the apparatus, or absorption by the cryostat polyethylene window.