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Title: Single-mode, narrow-linewidth external cavity quantum cascade laser through optical feedback from a partial-reflector

Journal Article · · Optics Express, 18(25):26037-26045
DOI:https://doi.org/10.1364/OE.18.026037· OSTI ID:1004809

An external-cavity (EC) quantum cascade (QC) laser using optical feedback from a partial-reflector is reported. With this configuration, the otherwise multi-mode emission of a Fabry-Perot QC laser was made single-mode with optical output powers exceeding 40 mW. A mode-hop free tuning range of 2.46 cm-1 was achieved by synchronously tuning the EC length and QC laser current. The linewidth of the partial-reflector EC-QC laser was measured for integration times from 100 μs to 4 s, and compared to a distributed feedback QC laser. Linewidths as small as 480 kHz were recorded for the EC-QC laser

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1004809
Report Number(s):
PNNL-SA-74726; NN2001000; TRN: US201104%%1051
Journal Information:
Optics Express, 18(25):26037-26045, Vol. 18, Issue 25
Country of Publication:
United States
Language:
English