A5072687196- Spectroscopy and Laser Applications
- Solid State Laser Technologies
- Photorefractive and Nonlinear Optics
- Advanced Fiber Laser Technologies
- Advanced Chemical Sensor Technologies
- Phase-change materials and chalcogenides
- Crystal Structures and Properties
- Photonic and Optical Devices
- Laser Design and Applications
- Laser Material Processing Techniques
- Atmospheric Ozone and Climate
- Nonlinear Optical Materials Studies
- Chalcogenide Semiconductor Thin Films
- Nonlinear Optical Materials Research
- Gas Sensing Nanomaterials and Sensors
- Atmospheric and Environmental Gas Dynamics
- Ocular and Laser Science Research
- Solid-state spectroscopy and crystallography
- Laser-Matter Interactions and Applications
- Analytical Chemistry and Sensors
- Extremum Seeking Control Systems
- Advanced Sensor Technologies Research
- Air Quality Monitoring and Forecasting
- Optical and Acousto-Optic Technologies
- Water Quality Monitoring and Analysis
Institute of Laser Physics
2019-2024
Novosibirsk State University
2020-2024
Novosibirsk State Technical University
2019-2024
Siberian Branch of the Russian Academy of Sciences
2022
The significance of intelligent sensor systems has grown across diverse sectors, including healthcare, environmental surveillance, industrial automation, and security. Photoacoustic gas sensors are a promising type optical due to their high sensitivity, enhanced frequency selectivity, fast response time. However, they have limitations such as dependence on high-power light source, requirement for high-quality acoustic signal detector, sensitivity factors, affecting accuracy reliability....
We investigated the laser-induced damage threshold of two barium chalcogenides crystals, BaGa4Se7 and BaGa2GeSe6, at 1.053 μm radiation with a pulse duration 7–10 ns different repetition rates, namely, 100 Hz, 500 1 kHz. The R-on-1 procedure was applied to determine 0% probability threshold. Both crystals have close values surface 0.1 kHz, 299 MW/cm2 (2.28 J/cm2) for 319 (2.30 BaGa4Se7.
The surface laser-induced damage threshold (LIDT) of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msub> <mml:mi mathvariant="normal">B</mml:mi> mathvariant="normal">a</mml:mi> mathvariant="normal">G</mml:mi> </mml:mrow> <mml:mn>4</mml:mn> </mml:msub> mathvariant="normal">S</mml:mi> mathvariant="normal">e</mml:mi> <mml:mn>7</mml:mn> </mml:math> and <mml:mn>2</mml:mn> <mml:mn>6</mml:mn> nonlinear crystals was studied at 2091...
We have designed and tested a broadband fan-out PPLN-based optical parametric oscillator (OPO) pumped by Q-switched Nd:YAG laser (1.064 ?m) operating in the spectral range 2.6 ? 4.2 ?m. The scheme of OPO utilises cylindrical pump beam expander for increasing effective aperture PPLN structure obtaining generation.
Abstract A tunable radiation source based on an optical parametric oscillator (OPO) with a periodically poled lithium niobate (PPLN), generating light wavelength of ∼2.1 μm in near-degenerate regime, is developed. The use volume Bragg grating (VBG) as selective element makes it possible to reduce significantly (by factor more than 180) the linewidth. Wavelength tuning from 2050 2117 nm for signal wave and 2140 2208 idler demonstrated. maximum average OPO output power found be 617 mW (123...
In this study, we address the challenge of estimating resonance frequency a photoacoustic detector (PAD) gas cell under varying temperature conditions, which is crucial for improving accuracy concentration measurements. We introduce novel approach that uses long short-term memory network and self-attention mechanism to model shifts based on data. To investigate impact mixture frequency, modified PAD include an internal sensor. Our experiments involved multiple heating cooling cycles with...
Abstract A potassium titanyl arsenate (KTiOAsO 4 , KTA) crystal 50 × 80 60 mm in size has been grown by upgraded Czochralski method from flux (TGGS) with a decrease temperature 900 to 770 °C during pulling. It is shown that the spectroscopic properties of parts KTA crystals at and are close, whereas electrical conductivity low-temperature (770 °C) part turned out be an order magnitude lower than high-temperature part. Visualisation domain structure second-harmonic generation microscopy...
Abstract We demonstrate advanced experimental approaches to photoacoustic gas detection with tunable mid-infrared (mid-IR) laser sources of different types. A analyzer for registration various components based on a narrow-linewidth optical parametric oscillator (OPO) was designed and investigated. Using this OPO, the possibility measuring trace concentration (∼2÷3 ppm) methane (CH 4 ) in air experimentally shown. The capability enhanced by introducing injection seeding into OPO. Another...
We explored possibility to enhance spectroscopic capabilities of mid-IR optical parametric oscillators (OPOs). Gas analysis based on the principles photoacoustic spectroscopy (PAS) [1] is known be an efficient approach measure concentration certain gases (e.g., methane) in atmosphere. Laser radiation source for PAS gas analyzer should provide high-energy pulsed output with narrow spectrum. There also fine tuning its wavelength a strong absorption line detected gas. Herein, we report original...
Optical parametric oscillator based on Russian domestic PPKTP structure was created. High quality KTP crystals, of resistivity as high as~10<sup>13</sup> Ohm*cm and coercive electric field low 2,3 kV/mm weregrownat Crystals Siberia Ltd.,and 1.8 mm-thick substrates were processed at Labfer Ltd.
The optical parametric oscillator based on the first PPKTP crystal produced in Russia was created. This has dimensions of 8×0.5×10 mm and polling period Λ1=37.9 μm, Λ2=38.7 μm. conversion efficiency pump into idler at repetition rate 1 kHz is 7.5%, quantum 17.8% slope 16.3%. generation threshold 110 μJ. PPKTA developed. Threshold for 130 μJ (14.4 MW/cm<sup>2</sup>), 27% differential 12%. signal wavelength 1.54 corresponded to 3.31