Frequency noise characterization of interband cascade lasers

Year: 2019

Authors: Borri S., Siciliani de Cumis M., Viciani S., Akikusa N., D’Amato F., De Natale P.

Autors Affiliation: CNR-INO – Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, and LENS, via N. Carrara 1, 50019 Sesto Fiorentino, FI, Italy; INFN, Sezione di Firenze, 50019 Sesto Fiorentino, FI, Italy; ASI Agenzia Spaziale Italiana – Centro di Geodesia Spaziale, Località Terlecchia, 75100 Matera, Italy; Development Bureau Laser Device R&D Group, Hamamatsu

Abstract: Thanks to their compactness and low-power consumption, Interband Cascade Lasers (ICLs) are emerging sources for mid-infrared (MIR) molecular sensing below 6 mu m. Understanding their noise features is of fundamental importance for applications like high-sensitivity and high-resolution spectroscopy. It could unveil details of their intrinsic physical behavior and, similarly to what happened for Quantum Cascade Lasers (QCLs), lead to the development of frequency and phase stabilization techniques for linewidth reduction. In this manuscript, we discuss the importance of full frequency noise characterization for ICLs, pointing out the main similarities and differences with respect to QCLs, and we show preliminary noise measurements. The frequency noise spectrum is analyzed and discussed, and the laser linewidth over different timescales calculated.

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KeyWords: Mid-IR Lasers, Interband Cascade Lasers, Frequency Noise Characterization, Frequency Stabilization, Quantum Cascade Lasers


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