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Related Experiment Video

Updated: Jul 9, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
09:10

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Mid-infrared external-cavity quantum-cascade laser.

G Totschnig, F Winter, V Pustogov

    Optics Letters
    |November 23, 2007
    PubMed
    Summary
    This summary is machine-generated.

    A novel external-cavity configuration enabled single-frequency operation for a room-temperature quantum cascade laser. This significantly boosted spectral intensity and achieved a wide tuning range without special coatings.

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    Published on: December 18, 2015

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    Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
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    Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
    12:57

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    Published on: October 13, 2017

    Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
    09:38

    Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

    Published on: December 18, 2015

    Area of Science:

    • Optics and Photonics
    • Semiconductor Lasers

    Background:

    • Multimode quantum cascade lasers (QCLs) typically operate across multiple frequencies.
    • Achieving single-frequency operation in QCLs is crucial for applications requiring precise wavelength control.
    • Room-temperature operation simplifies laser system design and reduces operational costs.

    Purpose of the Study:

    • To demonstrate single-frequency operation of a room-temperature quantum cascade laser.
    • To enhance the spectral intensity of the quantum cascade laser.
    • To achieve a broad tuning range for the single-frequency output.

    Main Methods:

    • Utilized a 17-mm short Littrow-type external-cavity configuration.
    • Employed a 10.4-mum multimode quantum cascade laser.
    • No antireflection coating was applied to the laser output facet.

    Main Results:

    • Successfully achieved single-frequency operation at 10.4-mum.
    • Increased spectral intensity by up to 20-fold compared to the multimode laser.
    • Demonstrated a single-frequency tuning range of 76 nm (7 cm(-1)).

    Conclusions:

    • The Littrow-type external cavity is an effective method for achieving single-frequency operation in room-temperature QCLs.
    • This configuration enhances spectral intensity and provides a significant tuning range.
    • The results were obtained without the need for antireflection coatings, simplifying the experimental setup.