RAS Institute of Chemistry of High Purity Substances

Nizhny Novgorod, Russia

RAS Institute of Chemistry of High Purity Substances

Nizhny Novgorod, Russia
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Yu Koptev M.,RAS Institute of Applied Physics | Anashkina E.A.,RAS Institute of Applied Physics | Andrianov A.V.,RAS Institute of Applied Physics | Dorofeev V.V.,RAS Institute of Chemistry of High Purity Substances | And 3 more authors.
Optics Letters | Year: 2015

A turnkey fiber laser source generating high-quality pulses with a spectral sech shape and Fourier transform-limited duration of order 100 fs widely tunable in the 1.6-2.65 ìm range is presented. It is based on Raman soliton selffrequency shifting in the suspended-core microstructured TeO2-WO3-La2O3 glass fiber pumped by a hybrid Er/Tm fiber system. Detailed experimental and theoretical studies, which are in a very good agreement, of nonlinear pulse dynamics in the tellurite fiber with carefully measured and calculated parameters are reported. A quantitatively verified numerical model is used to show Raman soliton shift in the range well beyond 3 ìm for increased pump energy. © 2015 Optical Society of America.


Shubin A.V.,Fiber Optics Research Center | Bufetov I.A.,Fiber Optics Research Center | Melkumov M.A.,Fiber Optics Research Center | Firstov S.V.,Fiber Optics Research Center | And 4 more authors.
Optics Letters | Year: 2012

An efficient CW bismuth fiber laser operating around 1.46 μm with an efficiency of >50% and an output power of >20 W has been developed on a bismuth-doped GeO2-SiO2 fiber. The laser demonstrates weak dependence of the output power on temperature in comparison with bismuth lasers operating near 1.15 and 1.3 μm. The laser generation has been obtained in the range 1.39 to 1.54 μm. The first linearly polarized bismuth-doped fiber laser at 1.46 μm based on a PANDA-type fiber has been demonstrated. © 2012 Optical Society of America.


Kosolapov A.F.,Fiber Optics Research Center | Pryamikov A.D.,Fiber Optics Research Center | Biriukov A.S.,Fiber Optics Research Center | Shiryaev V.S.,RAS Institute of Chemistry of High Purity Substances | And 5 more authors.
Optics Express | Year: 2011

A technologically simple optical fiber cross-section structure with a negative-curvature hollow-core has been proposed for the delivery of the CO 2 laser radiation. The structure was optimized numerically and then realized using Te20As30Se50 (TAS) chalcogenide glass. Guidance of the 10.6 μm CO2-laser radiation through this TAS-glass hollow-core fiber has been demonstrated. The loss at λ=10.6 μm was amounted ∼11 dB/m. A resonance behavior of the fiber bend loss as a function of the bend radius has been revealed. © 2011 Optical Society of America.


Bufetov I.A.,Fiber Optics Research Center | Melkumov M.A.,Fiber Optics Research Center | Firstov S.V.,Fiber Optics Research Center | Riumkin K.E.,Fiber Optics Research Center | And 4 more authors.
IEEE Journal on Selected Topics in Quantum Electronics | Year: 2014

The current state of the art in infrared Bi-doped fiber laser research is reviewed. The relevant fiber glass compositions and fiber technologies are introduced. Lasers operating on transitions ranging from 1.15 to 1.55 μm occurring in the bismuth active centers and their energy level schemes are discussed on the basis of the spectroscopic properties of these centers. Continuous-wave fundamental-mode power levels ranging from a few mW near 1.55 μm up to 16 W near 1.16 μm and 22 W near 1.46 μm have been demonstrated in recent years. © 1995-2012 IEEE.


Kotov L.V.,Fiber Optics Research Center | Likhachev M.E.,Fiber Optics Research Center | Bubnov M.M.,Fiber Optics Research Center | Paramonov V.M.,Fiber Optics Research Center | And 3 more authors.
Laser Physics Letters | Year: 2014

In this paper, we present results on the amplification of 2 MHz linewidth nanosecond pulses in a recently developed ytterbium-free erbium-doped large mode area fiber cladding pumped at 980 nm. A record peak power of 4 kW for single-frequency single-mode silica-based fiber sources near 1550 nm is demonstrated. Pulse instabilities arising in an all-fiber laser scheme from stimulated Brillouin scattering are described. © 2014 Astro Ltd Printed in the UK.


Konyukhov A.I.,Chernyshevsky Saratov State University | Romanova E.A.,Chernyshevsky Saratov State University | Shiryaev V.S.,RAS Institute of Chemistry of High Purity Substances
Optics and Spectroscopy (English translation of Optika i Spektroskopiya) | Year: 2011

Chalcogenide glasses are ideal materials for developing fiber lasers and amplifiers, remote sensors, high-speed switches, and other devices that operate in the IR range of 1-10 μm. The nonlinear refractive index of chalcogenide glasses may exceed that of quartz glass by a factor of 100-1200 or even more. The data on the dispersion properties of some chalcogenide glass compositions in the IR range are presented. The possibility of forming waveguide structures with specified dispersion properties (in particular with a fixed wave-length at which the group velocity dispersion is zero) from these glasses is numerically investigated. It is shown by the example of completely glassy periodic waveguide structures with planar geometry that the use of photonic band gap modes makes it possible the change the position of zero dispersion in a wide wavelength range. In the calculations the contrast of waveguide structures was varied using parameters of glasses of different composition. © Pleiades Publishing, Ltd., 2011.


Firstov S.,Fiber Optics Research Center | Alyshev S.,Fiber Optics Research Center | Khopin V.,RAS Institute of Chemistry of High Purity Substances | Melkumov M.,Fiber Optics Research Center | And 2 more authors.
Optics Express | Year: 2015

Photoinduced reduction of absorption (photobleaching) in bismuth-doped germanosilicate fibers irradiated with 532-nm laser has been observed for the first time. It was demonstrated that bismuth-related active centers having the absorption bands at wavelengths of 1400 and 1700 nm degrade under photoexcitation at 532 nm. The photobleaching process rate was estimated using conventional stretched exponential technique. It was found that the photobleaching rate in bismuth-doped germanosilicate fibers does not depend on type of bismuth-related active center. The possible underlying mechanism of photobleaching process in bismuth-doped fibers is discussed. © 2015 Optical Society of America.


Shiryaev V.S.,RAS Institute of Chemistry of High Purity Substances | Churbanov M.F.,RAS Institute of Chemistry of High Purity Substances
Journal of Non-Crystalline Solids | Year: 2013

The main directions of investigations and technological developments for improvement of technical and operational characteristics of optical fibers from chalcogenide glasses are considered. The methods of ultra purification of various chalcogenide glasses from the limiting impurities, the techniques of preparation of low loss optical fibers, including microstructured fibers, have been developed. The prospects for the use of chalcogenide fibers in telecommunication and non-linear optics systems are discussed. © 2013 Elsevier B.V. All rights reserved.


Ketkova L.A.,RAS Institute of Chemistry of High Purity Substances
Optical Materials | Year: 2015

3D laser ultramicroscopy (3D LUM) is intended specially for determining the concentration and size distribution of submicron inclusions in the bulk samples of high-purity materials for visible and IR fiber optics. In this work the 3D LUM technique is shown to be able to identify the nature of individual inclusions detected. The measurement of the light scattered by an inclusion at a varied probe beam wavelength and polarization and at a varied scattered light collection angle makes it possible to determine the inclusion refractive index. The 3D LUM possibilities are illustrated by the example of studying the inclusion nature in the As2S3 glass samples prepared by the direct synthesis from elements in a quartz container at elevated temperatures. © 2015 Elsevier B.V.


Melkumov M.A.,Fiber Optics Research Center | Bufetov I.A.,Fiber Optics Research Center | Shubin A.V.,Fiber Optics Research Center | Firstov S.V.,Fiber Optics Research Center | And 3 more authors.
Optics Letters | Year: 2011

A 24 dB gain bismuth-doped fiber amplifier at 1430nm pumped by a 65mW commercial laser diode at 1310nm is reported for the first time (to our knowledge). A 3 dB bandwidth of about 40nm, a noise figure of 6 dB, and a power conversion efficiency of about 60% are demonstrated. The temperature behavior of the gain spectrum is examined. © 2011 Optical Society of America.

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