Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Machine Learning Models for Predicting Key Performance Characteristics of High-Temperature THz Quantum Cascade Lasers.

Nanomaterials (Basel, Switzerland)·2026
Same author

Pathways and pitfalls: a qualitative study of student experiences in biomedical science education.

FEBS open bio·2026
Same author

The balance between defence systems and horizontal gene transfer shapes adaptation in clinical strains of Acinetobacter spp.

Journal of applied microbiology·2026
Same author

Free-space optical communications at 4 Gbit/s data rate with a terahertz laser.

Communications physics·2026
Same author

Roadmap for light interaction with biophotonic surfaces and their diverse applications.

Journal of biomedical optics·2026
Same author

Experimental analysis of the thermal management and internal quantum efficiency of terahertz quantum cascade laser harmonic frequency combs.

Nanophotonics (Berlin, Germany)·2025

Related Experiment Video

Updated: Mar 3, 2026

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

12.7K

Multi-spectral terahertz sensing: proposal for a coupled-cavity quantum cascade laser based optical feedback

Xiaoqiong Qi, Gary Agnew, Iman Kundu

    Optics Express
    |May 5, 2017
    PubMed
    Summary

    We developed a novel terahertz (THz) laser feedback interferometer using a quantum cascade laser (QCL). This multi-frequency system enables ultra-high-speed sensing and material identification applications.

    More Related Videos

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
    12:19

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

    Published on: April 4, 2017

    8.9K
    Implementation of a Reference Interferometer for Nanodetection
    16:11

    Implementation of a Reference Interferometer for Nanodetection

    Published on: April 26, 2014

    9.8K

    Related Experiment Videos

    Last Updated: Mar 3, 2026

    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

    12.7K
    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
    12:19

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

    Published on: April 4, 2017

    8.9K
    Implementation of a Reference Interferometer for Nanodetection
    16:11

    Implementation of a Reference Interferometer for Nanodetection

    Published on: April 26, 2014

    9.8K

    Area of Science:

    • Optoelectronics
    • Quantum Cascade Lasers
    • Terahertz Technology

    Background:

    • Terahertz (THz) interferometry is crucial for high-speed sensing.
    • Quantum cascade lasers (QCLs) offer unique THz emission properties.
    • Optical feedback significantly influences laser dynamics.

    Purpose of the Study:

    • To propose a novel laser feedback interferometer operating at multiple THz frequency bands.
    • To investigate the interplay of electro-optical, thermal, and feedback effects in a coupled-cavity THz QCL.
    • To demonstrate the potential for ultra-high-speed sensing and spectroscopy.

    Main Methods:

    • Utilized a pulsed coupled-cavity THz quantum cascade laser (QCL) under optical feedback.
    • Developed a theoretical model incorporating multi-mode reduced rate and thermal equations.
    • Analyzed self-heating effects in active and passive cavities.

    Main Results:

    • Predicted self-mixing signal responses across three distinct THz frequency bands.
    • The theoretical model successfully captured complex electro-optical and thermal interactions.
    • Demonstrated the feasibility of multi-spectral operation.

    Conclusions:

    • A multi-spectral laser feedback interferometry system based on a coupled-cavity THz QCL is proposed.
    • This system facilitates ultra-high-speed sensing and spectroscopic applications.
    • Potential applications include advanced material identification.