Coherent frequency combs produced by self frequency modulation in quantum cascade lasers
نویسندگان
چکیده
منابع مشابه
Frequency modulation spectroscopy by means of quantum-cascade lasers
In this paper we investigate the performance of quantum cascade (QC) lasers for high frequency modulation spectroscopy, particularly using frequency modulation (FM) and two-tone (2T) techniques. The coupling of the rf signal to the QC laser through the cryostat is studied in detail as well as the noise contributions of both the detector and the laser source to the final spectra. The experimenta...
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Static properties, relatively intensity noise and intensity modulation response in quantum cascade lasers (QCLs) studied theoretically in this paper. The present rate equations model consists of three equations for the electrons density in the conduction band and one equation for photons density in cavity length. Two equations were derived to calculate the noise and modulation response. Calcula...
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We recently reported the first Doppler-limited absolute frequency measurement of CO2 transitions around 4.4 μm wavelength, by linking a DFB Quantum Cascade Laser (QCL) to an Optical Frequency Comb Synthesizer (OFCS). We further achieved sub-Doppler recording of these transitions, improving of about three orders of magnitude the measurement precision. We are exploring techniques able to signific...
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ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2014
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.4866868