Mode-Resolved Cavity-Enhanced Vernier Spectroscopy Using an Interband Cascade Laser Frequency Comb
No abstract provided
Bagheri, Mahmood↗
Engineering topics
Sterczewski, Lukasz A.
Publications and source records attributed to Sterczewski, Lukasz A..
Terahertz Spectroscopy of Gas Mixtures with Dual Quantum Cascade Laser Frequency Combs
Terahertz laser frequency combs based on quantum cascade lasers provide coherent, broadband, electrically pumped, THz radiation sources for use in future spectroscopic applications. In this work, we explore the feasibility of such lasers in a dual-comb spectroscopy configuration for the detection of multiple molecular samples in the gas phase. The lasers span approximately 180 GHz of optical bandwidth, centered at 3.4 THz, with submilliwatt total optical power. One of the main advantages of dual-comb spectroscopy is its high speed, which opens up the possibility for direct observations of chemical reaction dynamics in the terahertz spectral region. As a proof-of-concept, we recorded continuously evolving spectra from gas mixtures with 1 ms temporal resolution.
42 ENGINEERING↗
Passively mode-locked interband cascade lasers
Optical frequency combs have revolutionized the field of high resolution real-time molecular spectroscopy. Here, we demonstrate an electrically-driven optical frequency comb whose sub-picosecond pulses span more than 1 THz of spectral bandwidth centered near 3.3 mm. This is achieved by passively mode locking an interband cascade laser in a multi-contact architecture with gain and saturable absorber sections monolithically integrated on the same chip.
Wysocki, Gerard↗