Coherent mid-infrared supercontinuum generation in tapered suspended-core As39Se61 fibers pumped by a few-optical-cycle Cr:ZnSe laser

We report on efficient supercontinuum generation in tapered suspended-core As39Se61 fibers pumped by a femtosecond mode-locked Cr:ZnSe laser. The supercontinuum spectrum spans the mid-infrared spectral region from 1.4 to 4.2 µm, and its spectral coherence is proved by heterodyning with a single-freq...

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Bibliographic Details
Published in:Optics letters 2020-03, Vol.45 (6), p.1346-1349
Main Authors: Leonov, Stanislav O, Wang, Yuchen, Shiryaev, Vladimir S, Snopatin, Gennady E, Stepanov, Boris S, Plotnichenko, Victor G, Vicentini, Edoardo, Gambetta, Alessio, Coluccelli, Nicola, Svelto, Cesare, Laporta, Paolo, Galzerano, Gianluca
Format: Article
Language:English
Subjects:
Fiber lasers
Heterodyning
Infrared spectra
Lasers
Noise intensity
Noise levels
Optical fibers
Relative intensity noise
Signal to noise ratio
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Summary:We report on efficient supercontinuum generation in tapered suspended-core As39Se61 fibers pumped by a femtosecond mode-locked Cr:ZnSe laser. The supercontinuum spectrum spans the mid-infrared spectral region from 1.4 to 4.2 µm, and its spectral coherence is proved by heterodyning with a single-frequency narrow-linewidth Er-fiber laser at 1.55 µm, measuring a beat note with 27-dB signal-to-noise ratio in a resolution bandwidth of 100 kHz. The intensity stability of the supercontinuum radiation is also characterized by relative intensity noise measurements.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.386429