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

Richard A. Cendejas, Mark C. Phillips, Tanya L. Myers, Matthew S. Taubman

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

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 seconds, and compared to a distributed feedback QC laser. Linewidths as small as 480 kHz were recorded for the EC-QC laser.

Original languageEnglish (US)
Pages (from-to)26037-26045
Number of pages9
JournalOptics Express
Volume18
Issue number25
DOIs
StatePublished - Dec 6 2010
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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