A5017465305- Solid State Laser Technologies
- Photonic Crystal and Fiber Optics
- Optical properties and cooling technologies in crystalline materials
- Spectroscopy Techniques in Biomedical and Chemical Research
- Glass properties and applications
- Advanced Fiber Optic Sensors
- Photorefractive and Nonlinear Optics
- Luminescence Properties of Advanced Materials
- Laser Design and Applications
- Spectroscopy and Chemometric Analyses
- Magnetic and transport properties of perovskites and related materials
- Optical Network Technologies
- Photonic and Optical Devices
- Optical and Acousto-Optic Technologies
- Phase-change materials and chalcogenides
- Infrared Thermography in Medicine
- Spectroscopy and Laser Applications
- Solid-state spectroscopy and crystallography
- Optical Imaging and Spectroscopy Techniques
- Shape Memory Alloy Transformations
- Laser Material Processing Techniques
- Semiconductor Lasers and Optical Devices
- Nonlinear Optical Materials Studies
- Ferroelectric and Piezoelectric Materials
- Material Science and Thermodynamics
Fiber Optics Research Center
2009-2023
Prokhorov General Physics Institute
1999-2023
Giredmet (Russia)
2022
Russian Academy of Sciences
1984-2009
RWTH Aachen University
2006
A wideband near-IR (NIR) luminescence centered at 1080 nm was found in a RbPb(2)Cl(5):Bi single crystal grown by the Bridgman technique. Absorption, luminescence, and excitation of spectra were investigated room cryogenic temperatures. The proposed to be due (3)P(1)-->(3)P(0) transition Bi(+) ion.
Near infrared (IR) applications have considerably profited from the use of flexible and robust fibre-optical probes. So far, a comparable technique for mid-IR was not available due to low stability lack robustness fibres. We report newly developed miniaturised diamond ATR-probe with high chemical resistance pressure based on fibre optics. The routine convenient application in glove box highly air- oxygen-sensitive reactions millilitre scale is reported, as well monitoring solventless...
Oscillation at 5.5μm wavelength has been investigated in the low-phonon, moisture-resistant RbPb2Cl5:Dy3+ crystal free-running mode room temperature. In line with our knowledge this is longest laser for a rare-earth doped that does not require any special precautions survival. Spectra and kinetics of luminescence new were under pumping to 1.3 μm absorption band, corresponding lasing experiments. Emission cross sections determined mid-IR transitions. It was found emission section on...
Microstructured crystalline optical fiber from silver halides is described. Both experimental and theoretical evidences are presented to establish that the effectively single mode at wavelength 10.6 micro m with numerical aperture NA=0.16 losses of approximately 2 dB/m. Crystalline microstructured fibers offer key advantages over step-index halide crystals. The wide transmission range wavelengths 2-20 provides great potential for applications in spectroscopy development a new...
Lasing at the 3F3 — 3H5 transition of Pr3+ ion in a nonhygroscopic Pr3+:RbPb2Cl5 crystal is obtained for first time room temperature and luminescent lasing properties are studied. The maximum differential cross section stimulated emission 2.31—2.59-μm band found to be 1.7×10-19 cm2 lifetime upper laser level 0.11 ms.
Longitudinal inhomogeneity of tracks inscribed in a YAG crystal and the statistics nonlinear transmittance writing beam is studied under conditions direct femtosecond laser non-thermal mode. Nonlinear fluctuations inherent were discovered, their correlation with track established. A model crystals built that includes three modes plastic deformation impact zone. The modification threshold identified reaching yield stress.
For the first time crystalline silver halide optical fibers with losses lower than 50 dB/km in a broad IR region from 9 to 14 micrometers were fabricated by an extrusion process. The loss mechanism essential lowest absorption materials and fibers, namely intraband free holes valence band is proposed. Rayleigh-type (lambda) (superscript -4) scattering obtained. An near 13 AgBrI of less 10 was discovered. Non-aged, stable polycrystalline fiber cables 1 dB/m 3 20 are demonstrated. Various...
A single-mode microstructured optical fibre is fabricated from silver halogenide crystals. The intended for the mid-IR region and features a large mode area (13600 μm2). It shown experimentally theoretically that in fact at 10.6 μm has an loss of 8 dB m−1.
A new Fourier transform infrared fiberoptic evanescent wave (FTIR-FEW) spectroscopy method has been developed for tissue diagnostics in the middle (MIR) wavelength range (3 to 20 micrometers). Specific novel fiberoptical chemical and biological sensors have studied used spectroscopic diagnostic purposes. These nontoxic nonhygroscopic fiber are characterized by (1) low optical losses (0.05 0.2 dB/m at about 10 micrometer) (2) high flexibility. Our devices can be utilized with standard...
The widening of distribution the laser radiation transmitted through polycrystalline KRS-5 fiber which leads to domination surface scattering and absorption in total optical losses has been measured. It found from obtained data that value loss increases with number reflections at side per unit length fiber. Scanning electron microscopy shown presence hollows along grain boundaries other imperfections.
The new method of fiber-optical evanescent wave Fourier transform IR (FEW-FTIR) spectroscopy has been applied to the diagnostics normal tissue, as well precancerous and cancerous conditions. FEW-FTIR technique is nondestructive sensitive changes vibrational spectra in region, without heating damaging human animal skin tissue. Therefore this an ideal diagnostic tool for tumor cancer characterization at early stage development on a molecular level. application fiber optic technology middle...
The results on the investigation of optical and mechanical properties polycrystalline IR fibers from point view their application in power delivery for laser surgery are discussed talk.
The necessity to take into consideration the absorption by free carriers in silver and thallium halides for evaluation of minimal' optical losses these materials fibers from them range 2 T 25 μm is pointed out first time. It shown that exceedsfor 1- orders previous minimal loss evaluations its value found be 10<sup>-1</sup> - 10<sup>-2</sup> dB/km.
The results of an experimental study the possibilities monitoring erbium yttrium aluminum garnet laser-mediated ablation human epidermis with use Fourier transform infrared (FTIR) spectroscopy and spectral polarization techniques are presented. attenuated total reflection (ATR) method was used for FTIR spectroscopic measurements. Spectral carried out by analyzing spectra degree residual linear a probe light diffusely reflected from laser-treated region skin. It found that analysis allows...