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

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

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 s...

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Veröffentlicht in:Optics express 2014-09, Vol.22 (19), p.23439-23455
Hauptverfasser: Hangauer, Andreas, Spinner, Georg, Nikodem, Michal, Wysocki, Gerard
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Sprache:eng
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Equipment Design
Lasers, Semiconductor
Models, Theoretical
Telecommunications - instrumentation
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creator Hangauer, Andreas
Spinner, Georg
Nikodem, Michal
Wysocki, Gerard
description 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.
doi_str_mv 10.1364/OE.22.023439
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subjects Equipment Design
Lasers, Semiconductor
Models, Theoretical
Telecommunications - instrumentation
title High frequency modulation capabilities and quasi single-sideband emission from a quantum cascade laser
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