Multi-Watt mid-IR femtosecond polycrystalline Cr<sup>2+</sup>:ZnS and Cr<sup>2+</sup>:ZnSe laser amplifiers with the spectrum spanning 2.0-2.6 µm

Optics Express
Sergey VasilyevValentin Gapontsev

Abstract

We demonstrate efficient amplification of few-optical-cycle mid-IR pulses in single-pass continuously pumped laser amplifiers based on polycrystalline Cr<sup>2+</sup>:ZnS and Cr<sup>2+</sup>:ZnSe. The 1.7 W output of a Kerr-lens mode-locked master oscillator at 2.4 µm central wavelength, 79 MHz repetition rate was amplified to 7.1 W and 2.7 W in Cr<sup>2+</sup>:ZnS and Cr<sup>2+</sup>:ZnSe, respectively. High peak power of the input pulses (0.5 MW) and high nonlinearity of the amplifiers' gain media resulted in a significant shortening of the output pulses and in spectral broadening. Transform-limited 40 fs pulses of the master oscillator were compressed to about 27-30 fs. The spectrum of the pulses was broadened from 136 nm to 450 nm (at -3 dB level); the span of the spectra exceeds 600 nm at -10 dB level.

References

Oct 20, 2009·Optics Letters·M Natali CizmeciyanAlphan Sennaroglu
Dec 25, 2012·Optics Express·Evgeni SorokinIrina T Sorokina
Feb 6, 2013·Optics Letters·M N CizmeciyanA Sennaroglu
Mar 26, 2014·Optics Express·Sergey VasilyevValentin Gapontsev
Mar 26, 2014·Optics Express·Nikolai TolstikIrina T Sorokina
Mar 26, 2014·Optics Express·Magali DurandMartin Richardson
Oct 30, 2015·Optics Letters·Sergey VasilyevValentin Gapontsev

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Citations

Oct 19, 2017·Optics Express·Yuchen WangGianluca Galzerano
Dec 28, 2019·Optics Express·Tuanjie DuZhengqian Luo
Sep 9, 2016·Optics Express·Igor MoskalevValentin Gapontsev
Mar 7, 2016·Optics Express·Katia GalloF Ömer Ilday

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