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Wavelength Electronics Inc.

51 Evergreen Dr.
PO Box 865
Bozeman, MT 59715
United States

Phone: +1 406-587-4910

Fax: +1 406-587-4911

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Self-Detecting Dual-Comb Spectroscopy with Injection-Locked QCLs

Monday, December 8, 2025
Researchers demonstrated a self-detecting mid-infrared dual-comb spectroscopy system using injection-locked Quantum Cascade Lasers (QCLs). By integrating detection within the laser chip, they eliminated bulky external photodetectors, reducing system size and sensitivity to vibration. Using RF injection locking, the system achieved stable, broad spectral coverage with narrow linewidths, proving viable for portable molecular sensing and spectroscopy applications.

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File: Self_Detecting_Dual_Comb_Spectroscopy_with_Injection_Locked_QCLs.pdf (2.68 MB)
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