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Spectral superbroadening of subnanojoule Cr:Forsterite femtosecond laser pulses in a tapered fiber |
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| Authors: | D A Akimov A A Ivanov M V Alfimov S N Bagayev T A Birks W J Wadsworth P St J Russell A B Fedotov V S Pivtsov A A Podshivalov A M Zheltikov |
| Institution: | (1) Physics Faculty, International Laser Center, M.V. Lomonosov Moscow State University, 119899 Moscow, Russia;(2) Center of Photochemistry, Russian Academy of Sciences, ul. Novatorov 7a, 117421 Moscow, Russia;(3) Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, pr. Lavrent’eva 13/3, 630090 Novosibirsk, Russia;(4) Department of Physics, University of Bath, BA2 7AY Bath, United Kingdom |
| Abstract: | Spectral superbroadening of subnanojoule femtosecond Cr:forsterite laser pulses is demonstrated for the first time in experiments with a tapered fiber. Coupling 40-fs 0.6-nJ pulses of 1.25-μm Cr:forsterite laser radiation into a tapered fiber with a taper waist diameter of about 2 μm and a taper waist length of 90 mm, we observed the spectra spanning more than two octaves at the output of the fiber. These experimental results open new horizons for the creation of compact femtosecond systems based on Cr:forsterite lasers and tapered fibers for optical metrology and biomedical applications. |
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