High frequency modulation capabilities and quasi single-sideband emission from a quantum cascade laser

Andreas Hangauer, Georg Spinner, Michal Nikodem, Gerard Wysocki

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Both intensity- (IM) and frequency-modulation (FM) behavior of a directly modulated quantum cascade laser (QCL) are measured from 300 Hz to 1.7 GHz. Quantitative measurements of tuning coefficients has been performed and the transition from thermal- to electronic-tuning is clearly observed. A very specific FM behavior of QCLs has been identified which allows for optical quasi single sideband (SSB) modulation through current injection and has not been observed in directly modulated semiconductor lasers before. This predestines QCLs in applications where SSB is required, such as telecommunication or high speed spectroscopy. The experimental procedure and theoretical modeling for data extraction is discussed.

Original languageEnglish (US)
Pages (from-to)23439-23455
Number of pages17
JournalOptics Express
Volume22
Issue number19
DOIs
StatePublished - Sep 22 2014

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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