Showing papers presented at "International Conference Laser Optics in 2016"
01 Jun 2016
TL;DR: In this paper, a single-shot operation of liquid nitrogen cooled single-crystalline Fe:ZnSe laser at 4100-nm wavelength was demonstrated, achieving energy efficiency of over 10 J and efficiencies of over 44% in single shot operation.
Abstract: Energies of over 10 J and efficiencies of over 44% have been demonstrated in single-shot operation of liquid nitrogen cooled single-crystalline Fe:ZnSe laser at 4100-nm wavelength.
12 citations
01 Jun 2016
TL;DR: Software for managing and reading the angular coordinates of the laser beam was created and an example implementation of such a module performing a combined scan in wide and narrow angle fields was shown.
Abstract: Lidar module that allows perform spiral scanning of the investigated area was developed. Software for managing and reading the angular coordinates of the laser beam was created. An example implementation of such a module performing a combined scan in wide and narrow angle fields was shown.
10 citations
01 Jun 2016
TL;DR: In this article, a review on recent results on lasers and amplifiers operating in four bands between 1.1 and 1.8 μm using Bi-doped active fibers with different compositions is given.
Abstract: Review on recent results on lasers and amplifiers operating in four bands between 1.1 and 1.8 μm using Bi-doped active fibers with different compositions will be given. Future prospects of the Bi-doped fibers and devices will be discussed.
8 citations
01 Jun 2016
TL;DR: Porphyrin-based substances are modern materials applied in the design of preparations used for photodiagnostics and photodynamic therapy of cancer as mentioned in this paper, and wide interest to their study is drawn by its low toxicity and high selectivity to accumulation in tumor tissues.
Abstract: Porphyrin-based substances are modern materials applied in the design of preparations used for photodiagnostics and photodynamic therapy of cancer [1]. The wide interest to their study is drawn by its low toxicity and high selectivity to accumulation in tumor tissues. At that, the photodiagnostics task requires pronounced photoluminescent properties of porphyrins, whereas the photodynamic therapy is based on their high efficiency as regards to photosensibilization of reactive oxygen species, and especially of singlet oxygen.
6 citations
01 Jun 2016
TL;DR: In this paper, the authors perform numerical simulations to study spatiotemporal distortions in noncollinear optical parametric chirped-pulse amplifiers under different amplification conditions and show that pulse front tilt is always present.
Abstract: We perform numerical simulations to study spatiotemporal distortions in noncollinear optical parametric chirped-pulse amplifiers under different amplification conditions and show that pulse front tilt is always present.
6 citations
01 Jun 2016
TL;DR: A cycle of experiments was carried out to study the dependence of Picea abies (a fir-tree ordinary, family pine) seed sowing qualities from the influence of laser radiation in different conditions.
Abstract: Researches are directed on studying of the biological processes caused by violet (k = 405 nanometers) and red (k = 640 nanometers) laser radiation on seed integumentary layers. A cycle of experiments was carried out to study the dependence of Picea abies (a fir-tree ordinary, family pine) seed sowing qualities from the influence of laser radiation in different conditions. After being exposed by laser influence, seed germinating ability and seedling growth were studied and compared with the indexes of control group. Results showed that the radiated seed germinating ability is higher, than the one of control group of seeds.
5 citations
01 Jun 2016
TL;DR: The spectral correlation method for determining the height of the optical inhomogeneities and speckle-interferometer based on optical vortices for increasing sensitivity to longitudinal displacements of the scattering objects is presented.
Abstract: The spectral correlation method for determining the height of the optical inhomogeneities and speckle-interferometer based on optical vortices for increasing sensitivity to longitudinal displacements of the scattering objects ares presented.
4 citations
01 Jun 2016
TL;DR: In this paper, the authors compared Monte Carlo simulation (MC) with exact analytical results based on improved Kubelka-Munk approach for light transport in 1D turbid media.
Abstract: Solution of the direct problem of light transport in 1D turbid media by Monte Carlo simulation (MC) was compared with exact analytical results based on improved Kubelka-Munk approach. The divergence of these two solutions was observed. Improvement of MC was proposed to satisfy the exact approach.
4 citations
01 Jun 2016
TL;DR: The project is planned to conduct experimental studies aimed at identifying the impact of the application of the basic laws of chip and microlasers as radiators on the linear-angular characteristics of existing measurement systems.
Abstract: According to the current great interest concerning Large-Scale Metrology applications in many different fields of manufacturing industry, technologies and techniques for dimensional measurement have recently shown a substantial improvement. Ease-of-use, logistic and economic issues, as well as metrological performance, are assuming a more and more important role among system requirements. The project is planned to conduct experimental studies aimed at identifying the impact of the application of the basic laws of chip and microlasers as radiators on the linear-angular characteristics of existing measurement systems.
4 citations
01 Jun 2016
TL;DR: In this article, an efficient Er:YAG DPSSL with passive Q-switch was discussed and the spectroscopic properties of the DPSSL were analyzed, and the multipass pump scheme and multipass lasing scheme were discussed.
Abstract: We discuss an efficient Er:YAG DPSSL with passive Q-switch and analyze Er:YAG spectroscopic properties for efficient performance. The multipass pump scheme and multipass lasing scheme are discussed.
4 citations
25 Aug 2016
TL;DR: In this article, the authors demonstrated the amplification of small signals in a spectral range of 2.15 um by all-fiber Ho-doped amplifier pumped at 1125 nm.
Abstract: We have demonstrated the amplification of the small signals in a spectral range of 2–2.15 um by all-fiber Ho-doped amplifier pumped at 1125 nm. Maximum gain more than 35 dB was achieved.
25 Aug 2016
TL;DR: A method for skin tumors diagnostics based on the analysis of changes in the AF spectrum in the near infrared region through its exponential approximation allows for malignant melanoma diagnosis with an accuracy of 88.4% for ex vivo studies, and 86.2% for the in vivo studies.
Abstract: A method for skin tumors diagnostics based on the analysis of changes in the AF spectrum in the near infrared region is proposed. The analysis of the AF spectrum was implemented via its exponential approximation. Proposed approach allows for malignant melanoma diagnosis with an accuracy of 88.4% for ex vivo studies, and 86.2% for the in vivo studies.
25 Aug 2016
TL;DR: CARS-lidar allows to register the radionuclide with a concentration level of 3÷10 molecules has been shown in this article, where the design and functional subsystems of a lidar sensor for the remote detection of isotopes of iodine, indicators of radioactive contamination was developed.
Abstract: Design and functional subsystems of a lidar sensor for the remote detection of isotopes of iodine, indicators of radioactive contamination was developed. CARS-lidar allows to register the radionuclide with a concentration level of 3÷10 molecules has been shown.
25 Aug 2016
TL;DR: Novosibirsk Free Electron Laser (FEL) facility as discussed by the authors contains three FELs operating in the wavelength range 8-240 micron at average power up to 0.5 kW and peak power about 1 MW.
Abstract: Novosibirsk free electron laser (FEL) facility contains three FELs operating in the wavelength range 8–240 micron at average power up to 0.5 kW and peak power about 1 MW. Radiation users works at 6 user stations performing biological, chemical, physical and medical research.
01 Jun 2016
TL;DR: In this article, an approach to combine tumor cryosurgery with laser therapy and optical diagnosis using sapphire shaped crystals has been demonstrated, which allows performing tissue destruction, or therapy, and optical analysis simultaneously.
Abstract: Approach to combine tumor cryosurgery with laser therapy and optical diagnosis using sapphire shaped crystals has been demonstrated. Unique properties of sapphire shaped crystals (thermal, mechanical, and chemical strength complemented with high optical transparency and thermal conductivity) allow performing tissue destruction, or therapy, and optical diagnosis simultaneously.
01 Jun 2016
TL;DR: In this paper, a high power diode-pumped Nd: YAG 1.064 μm laser with pulse duration of 100 ps, energy of 360 mJ, pulse repetition rate of 200 Hz and divergence of laser radiation at the level 1.3 of diffraction limit was obtained.
Abstract: We developed high-power diode-pumped Nd: YAG 1.064 μm laser with pulse duration of 100 ps, energy of 360 mJ, pulse repetition rate of 200 Hz and divergence of laser radiation at the level 1.3 of diffraction limit. 72%-efflciency of second harmonic generation of the laser output was obtained.
01 Jun 2016
TL;DR: In this article, the generation of Kerr frequency comb in normal group velocity dispersion (GVD) barium fluoride whispering gallery mode (W GM) resonator is reported, where the overmoded resonator was pumped with 1550 nm c.w. light.
Abstract: We report the generation of Kerr frequency comb in normal group velocity dispersion (GVD) barium fluoride whispering gallery mode (W GM) resonator. Stimulated Brillouin scattering (SBS) with pump and Stokes beams in resonance with modes of the same high quality cavity is also observed. The overmoded resonator is pumped with 1550 nm c.w. light.
25 Aug 2016
TL;DR: In this paper, a laser method of biocompatible coatings forming to create implants of the human body ligaments is devoted to laser method for creating implantable ligaments.
Abstract: The work is devoted to laser method of biocompatible coatings forming to create implants of the human body ligaments. Coating is a carbon nanotubes scaffold formed in the water-protein dispersion by the electric field of the laser radiation. Study has been conducted on the structure and properties of carbon nanotubes coatings and proliferative activity of biological cells on its surface.
01 Jun 2016
TL;DR: In this article, a laser locator being created by JC «RPC «PSI» will allow ranging to retroreflectors installed on the Moon's surface with the millimeter accuracy.
Abstract: Laser locator being created by JC «RPC «PSI» will allow ranging to retroreflectors installed on the Moon's surface with the millimeter accuracy. Laser transmitter developed by the ITMO University is one of component parts of this locator, which features high power of 250mJ at the wavelength of 532nm, having the pulse duration of 100ps and repetition rate of 200Hz.
01 Jun 2016
TL;DR: In this paper, experiments performed using the system of two quantum magnetometers with laser pumping showed the possibility of reduction of the light shift influence on frequency stability of the miniature quantum magnetometer.
Abstract: The experiments performed using the system of two quantum magnetometers with laser pumping showed the possibility of reduction of the light shift influence on frequency stability of the miniature quantum magnetometer.
25 Aug 2016
TL;DR: In this article, an external-cavity hybrid laser consisting of a III-V Semiconductor Optical Amplifier and Photonic Crystal (PhC) based resonant reflector is presented.
Abstract: Energy efficient Wavelength Division Multiplexing (WDM) is the key to satisfying the future bandwidth requirements of datacentres. As the silicon photonics platform is regarded the only technology able to meet the required power and cost efficiency levels, the development of silicon photonics compatible narrow linewidth lasers is now crucial. We discuss the requirements for such laser systems and report the experimental demonstration of an external-cavity hybrid lasers consisting of a III-V Semiconductor Optical Amplifier and Photonic Crystal (PhC) based resonant reflector.
01 Jun 2016
TL;DR: In this article, a Gaussian gain profile with a ∼20% dip near the center is proposed to optimize the amplified signal spectral shape, and the optimal parameters of the noncollinear type I BBO-based parametric amplifier were established.
Abstract: The calculation of parametric amplification unit based on nonlinear borate crystals for multiterawatt femtosecond laser system has been carried out. A Gaussian gain profile with a ∼20% dip near the center is proposed to optimize the amplified signal spectral shape. Optimal parameters of the noncollinear type I BBO-based parametric amplifier were established.
01 Jun 2016
TL;DR: In this article, the authors present the development of distributed Bragg reflector (DBR) ridge waveguide (RW) diode lasers for vibrational spectroscopy and high brightness DBR-tapered lasers for non-linear optics.
Abstract: Wavelength stabilized high-power diode lasers are requested light sources in the field of laser based sensor systems. They are used as pump lasers for non-linear frequency conversion, e.g. second harmonic generation, to pump solid state fs-laser devices applied for diagnostic purposes in life sciences and they are applied directly as light sources for absorption or Raman spectroscopy. This paper presents recent developments concerning distributed Bragg reflector (DBR) ridge waveguide (RW) diode lasers for vibrational spectroscopy and high brightness DBR-tapered lasers for non-linear optics. The manufacturing and the electro-optical, spectral, and beam parameters of these devices will be presented together with a compact handheld Raman probe using an implemented dual-wavelength DBR-RW diode laser for Shifted Excitation Raman Difference Spectroscopy (SERDS).
01 Jun 2016
TL;DR: In this article, an angle measurement system intended for measuring angles between some directions set in the space by reflectors is presented, which operates by continuous rotation of platform with the autocollimating null-indicator and the ring laser or the holographic optical encoder.
Abstract: The angle measurement system intended for measuring angles between some directions set in the space by reflectors is presented in the report. The system operates by continuous rotation of platform with the autocollimating null-indicator and the ring laser or the holographic optical encoder.
25 Aug 2016
TL;DR: A review of the recent achievements in the field of autofluorescence spectroscopy of cutaneous neoplasia would be presented.
Abstract: A review of the recent achievements in the field of autofluorescence spectroscopy of cutaneous neoplasia would be presented. Excitation-emission matrices, synchronous fluorescence spectroscopy and other steady-state approaches are used for development of whole picture of the autofluorescent properties of benign, dysplastic and malignant lesions. Spectral peculiarities and fluorophores' content changes are used for development of differentiation algorithms for diagnostic needs.
25 Aug 2016
TL;DR: The need to use the theory of laser optics to develop modern high-performance optical systems of laser processing heads, which form the beam of the high-power fiber laser, is discussed.
Abstract: The need to use the theory of laser optics to develop modern high-performance optical systems of laser processing heads, which form the beam of the high-power fiber laser, is discussed. A technique for synthesis of high-performance optical heads of laser systems for various purposes is elaborated and software-implemented.
25 Aug 2016
TL;DR: In this article, the luminescence of the quantum dots of different colors glow in the samples of photonic crystal fibers modified with self-organizing layers of polyaniline was studied.
Abstract: The luminescence of the quantum dots of different colors glow in the samples of photonic crystal fibers modified with self-organizing layers of polyaniline was studied.
25 Aug 2016
TL;DR: In this article, the authors proposed a new technique based on McCall and Hahn Area theorem, allowing to predict the main features of CML regimes, study theoretically the possibility of single-cycle optical pulse generation and provide experimental study of mode-locked regimes in laser with a coherent absorber.
Abstract: Coherent mode-locking (CML) is based on intracavity self-induced transparency phenomena and allows generating single-cycle laser pulses. We propose a new technique based on McCall and Hahn Area theorem, allowing to predict the main features of CML regimes, study theoretically the possibility of single-cycle optical pulse generation and provide experimental study of mode-locked regimes in laser with a coherent absorber.
01 Jun 2016
TL;DR: The article is devoted to wireless and fiber-optic transmission of laser energy for operation of special actuators and control of the shape of the deformable space-based antenna.
Abstract: The article is devoted to wireless and fiber-optic transmission of laser energy for operation of special actuators and control of the shape of the deformable space-based antenna.
25 Aug 2016
TL;DR: In this paper, the authors proposed to reconstruct the real-time atmospheric turbulence in the lab by means of the stacked-actuator deformable mirror and the bimorph deformed mirror.
Abstract: It is suggested to reconstruct the real-time atmospheric turbulence in the lab by means of the stacked-actuator deformable mirror and the bimorph deformable mirror. The characteristics of the spatial reconstruction are discussed. The phase screens interpolation methods are presented. The problems of the reconstruction are shown.