arXiv subjects

A. A. Sysolyatin

Publications and source records attributed to A. A. Sysolyatin.

2 recordsLinked to original sources

arXiv2018

Compression of Femtosecond Pulses in a wide Wavelength Range Using a Large Mode Area Tapered Fiber

We report design of a tapered fiber that can be used for compression of pulses at different central wavelengths. The proposed fiber is a 3-layer W-type large-mode-area fiber, which has been tapered to transform the mode area from 1700 μm2 to 900 μm2. We determine the exact length of the maximum pulse compression and numerically demonstrate the compression of 250 fs, 100 kW peak power input pulse to 15 fs, 850 kW at 1.55 μm wavelength and 250 fs, 120 kW peak power input pulses to 28 fs, 700 kW and to 46 fs, 500 kW at 1.8 μm and 2 μm wavelengths, respectively. Such a fiber can find wide ranging applications including in communication, spectroscopy and medicine.

physics.optics↗

arXiv2017

Luminescence in germania-silica fibers in 1-2 μm region

We analyze the origins of the luminescence in germania-silica fibers with high germanium concentration (about 30 mol. % GeO2) in the region 1-2 μm with a laser pump at the wavelength 532 nm. We show that such fibers demonstrate the high level of luminescence which unlikely allows the observation of photon triplets, generated in a third-order spontaneous parametric down-conversion process in such fibers. The only efficient approach to the luminescence reduction is the hydrogen saturation of fiber samples, however, even in this case the level of residual luminescence is still too high for three-photon registration.

cond-mat.mtrl-sci↗