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RSS2010 Vol. 22, No. 08
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2010,
22.
Abstract:
A driving circuit was designed for the electro-optical phase modulator, according to its structural characteristics. The circuit consists of OP37 and PA84. It is simple, but stable. The peak-to-peak value of the circuit’s output voltage is up to 200 ...
A driving circuit was designed for the electro-optical phase modulator, according to its structural characteristics. The circuit consists of OP37 and PA84. It is simple, but stable. The peak-to-peak value of the circuit’s output voltage is up to 200 ...
2010,
22.
Abstract:
A femtosecond pulsed laser(800 nm, 120 fs, 3 W, 1 000 Hz) was used to deposit diamond-like carbon(DLC) films on Si substrate. Effects of bias, substrate temperature and oxygen ambient on DLC films were studied. Experiments show that the best DLC film...
A femtosecond pulsed laser(800 nm, 120 fs, 3 W, 1 000 Hz) was used to deposit diamond-like carbon(DLC) films on Si substrate. Effects of bias, substrate temperature and oxygen ambient on DLC films were studied. Experiments show that the best DLC film...
2010,
22.
Abstract:
The growth of interference fringes caused by nonlinear propagation instabilities has been experimentally investigated using a femtosecond pulsed laser. This paper reports the measurements of growth rate for fringes in a glass cuvette filled with CS2 ...
The growth of interference fringes caused by nonlinear propagation instabilities has been experimentally investigated using a femtosecond pulsed laser. This paper reports the measurements of growth rate for fringes in a glass cuvette filled with CS2 ...
2010,
22.
Abstract:
A novel interferometer is designed based on the dispersive property of slow light media. The numerical simulation on its physical process proves that the spectral sensitivity of interferometer can be enhanced effectively using the slow light medium. ...
A novel interferometer is designed based on the dispersive property of slow light media. The numerical simulation on its physical process proves that the spectral sensitivity of interferometer can be enhanced effectively using the slow light medium. ...
2010,
22.
Abstract:
GaSb-based InGaAsSb/AlGaAsSb multi-quantum-wells structure are designed and grown by molecular beam epitaxy(MBE). Characterization of the layers by X-ray diffraction and photoluminescence has been performed. The results showed that the epilayer has h...
GaSb-based InGaAsSb/AlGaAsSb multi-quantum-wells structure are designed and grown by molecular beam epitaxy(MBE). Characterization of the layers by X-ray diffraction and photoluminescence has been performed. The results showed that the epilayer has h...
2010,
22.
Abstract:
The mechanism of gray-tracking and the influence of color center on gray-tracking are studied for KTP crystal, with a Q-switched laser whose wavelength and pulse width are 1 064 nm/532 nm and 6 ns respectively. The transmittance of crystal represents...
The mechanism of gray-tracking and the influence of color center on gray-tracking are studied for KTP crystal, with a Q-switched laser whose wavelength and pulse width are 1 064 nm/532 nm and 6 ns respectively. The transmittance of crystal represents...
2010,
22.
Abstract:
Polarization properties of defect modes of one-dimensional photonic crystals with negative-index materials are investigated by optical transfer matrix method. It is found that the defect modes in the zero-average-index gap have a strong dependence on...
Polarization properties of defect modes of one-dimensional photonic crystals with negative-index materials are investigated by optical transfer matrix method. It is found that the defect modes in the zero-average-index gap have a strong dependence on...
2010,
22.
Abstract:
This paper proposes theoretically a novel terahertz source based on polarization-maintaining optical fibers. Utilizing the dual-wavelength laser as the pump source and four-wave-mixing effect in the optical fibers, a compact wide-tunable narrowband t...
This paper proposes theoretically a novel terahertz source based on polarization-maintaining optical fibers. Utilizing the dual-wavelength laser as the pump source and four-wave-mixing effect in the optical fibers, a compact wide-tunable narrowband t...
2010,
22.
Abstract:
In the experiment, visible light array CCD imaging system was irradiated by continuous wave infrared laser. Crosstalk saturation and full-screen saturation were observed, and cross saturation threshold was less than 2.0×102 W/cm2, full-screen saturat...
In the experiment, visible light array CCD imaging system was irradiated by continuous wave infrared laser. Crosstalk saturation and full-screen saturation were observed, and cross saturation threshold was less than 2.0×102 W/cm2, full-screen saturat...
2010,
22.
Abstract:
This paper proposes theoretically a novel terahertz source based on polarization-maintaining optical fibers. Utilizing the dual-wavelength laser as the pump source and four-wave-mixing effect in the optical fibers, a compact wide-tunable narrowband t...
This paper proposes theoretically a novel terahertz source based on polarization-maintaining optical fibers. Utilizing the dual-wavelength laser as the pump source and four-wave-mixing effect in the optical fibers, a compact wide-tunable narrowband t...
2010,
22.
Abstract:
The key technology of fluorescence lifetime imaging microscopy is introduced. Time-correlated single photon counting in time-domain method is adopted to record fluorescence lifetime. The counting efficiency and the amount of information in the data c...
The key technology of fluorescence lifetime imaging microscopy is introduced. Time-correlated single photon counting in time-domain method is adopted to record fluorescence lifetime. The counting efficiency and the amount of information in the data c...
2010,
22.
Abstract:
An anisotropic metamaterial with linear dispersion relation was investigated according to Maxwell equations. Based on the linear dispersion, the relation between the elements of dielectric tensor and permeability tensor was obtained. According to the...
An anisotropic metamaterial with linear dispersion relation was investigated according to Maxwell equations. Based on the linear dispersion, the relation between the elements of dielectric tensor and permeability tensor was obtained. According to the...
2010,
22.
Abstract:
Based on the Drude mode, beam focusing in metamaterials with both electric and magnetic nonlinearities are investigated, both analytically and numerically. The results show that beam focusing occurs not only in self-focusing nonlinear materials (posi...
Based on the Drude mode, beam focusing in metamaterials with both electric and magnetic nonlinearities are investigated, both analytically and numerically. The results show that beam focusing occurs not only in self-focusing nonlinear materials (posi...
2010,
22.
Abstract:
In pulsed laser ranging system, the time interval measurement to improve the accuracy of the interpolation method for time interval measurement. This article analyzes the traditional digital counting method based on the principle and error, focusing ...
In pulsed laser ranging system, the time interval measurement to improve the accuracy of the interpolation method for time interval measurement. This article analyzes the traditional digital counting method based on the principle and error, focusing ...
2010,
22.
Abstract:
A 3-D numerical model of the temperature field for the laser transformation hardening was created based on finite element software ProCAST. The temperature field of the laser transformation hardening of ductile cast iron QT600-3 was calculated. Accor...
A 3-D numerical model of the temperature field for the laser transformation hardening was created based on finite element software ProCAST. The temperature field of the laser transformation hardening of ductile cast iron QT600-3 was calculated. Accor...
2010,
22.
Abstract:
Based on the vectorial Debye theory, the tight focusing of double-ring-shaped radially polarized vortex beams (DRS-RPVBs) through a dielectric interface is investigated. The investigation illustrates that when the interception ratio of the aperture r...
Based on the vectorial Debye theory, the tight focusing of double-ring-shaped radially polarized vortex beams (DRS-RPVBs) through a dielectric interface is investigated. The investigation illustrates that when the interception ratio of the aperture r...
2010,
22.
Abstract:
The electron beam evaporation deposition method was employed to prepare scandium oxide(Sc2O3) films with substrate temperatures varying from 50 to 350 ℃. A spectrophotometer, a glancing incidence X-ray diffraction spectrometer and a WYKO optical prof...
The electron beam evaporation deposition method was employed to prepare scandium oxide(Sc2O3) films with substrate temperatures varying from 50 to 350 ℃. A spectrophotometer, a glancing incidence X-ray diffraction spectrometer and a WYKO optical prof...
2010,
22.
Abstract:
Analytic expressions of spectrum transmissivity for the parallel grating-pair is deduced, with which the influence of the stretcher and compressor on the temporal properties of the output pulse laser can be analyzed. The analysis results show that, t...
Analytic expressions of spectrum transmissivity for the parallel grating-pair is deduced, with which the influence of the stretcher and compressor on the temporal properties of the output pulse laser can be analyzed. The analysis results show that, t...
2010,
22.
Abstract:
When radial shear interferometer is used in high-power laser wavefront detection, due to the influence of the nonlinearity of CCD, there exist not only the first order frequency with wave-front information but also the second and the third order freq...
When radial shear interferometer is used in high-power laser wavefront detection, due to the influence of the nonlinearity of CCD, there exist not only the first order frequency with wave-front information but also the second and the third order freq...
2010,
22.
Abstract:
In order to study the effects of laser shock peening on the fatigue life of LY2 aluminum alloy, water and aluminum foil were used for confining medium and ablation medium, respectively. LY2 specimens were processed with YAG laser. The laser peening p...
In order to study the effects of laser shock peening on the fatigue life of LY2 aluminum alloy, water and aluminum foil were used for confining medium and ablation medium, respectively. LY2 specimens were processed with YAG laser. The laser peening p...
2010,
22.
Abstract:
The optical losses of asymmetric and symmetric waveguide structures were calculated theoretically for high power 980 nm diode lasers, by means of the continuity equation under strong injection and the Helmholtz equation of complex refractive index mo...
The optical losses of asymmetric and symmetric waveguide structures were calculated theoretically for high power 980 nm diode lasers, by means of the continuity equation under strong injection and the Helmholtz equation of complex refractive index mo...
2010,
22.
Abstract:
According to angular spectrum representation, formalisms describing paraxial Hermite-Gaussian and Laguerre-Gaussian beams propagating through an isotropic negative refractive index material (NIM) slab are presented. Focusing and phase compensation of...
According to angular spectrum representation, formalisms describing paraxial Hermite-Gaussian and Laguerre-Gaussian beams propagating through an isotropic negative refractive index material (NIM) slab are presented. Focusing and phase compensation of...
2010,
22.
Abstract:
Range imaging of laser radar can reflect the targets geometry structure, and different poses of the same target lead to a tremendous variety of range imaging. Thus pose estimation is especially important for automated target recognition (ATR). Ulf G...
Range imaging of laser radar can reflect the targets geometry structure, and different poses of the same target lead to a tremendous variety of range imaging. Thus pose estimation is especially important for automated target recognition (ATR). Ulf G...
2010,
22.
Abstract:
A theoretical model to describe the three-dimensional deformation distribution of an optical sample irradiated by a square-wave modulated laser is presented. The surface thermal lens(STL) signal is defined based on the deformation theory simultaneous...
A theoretical model to describe the three-dimensional deformation distribution of an optical sample irradiated by a square-wave modulated laser is presented. The surface thermal lens(STL) signal is defined based on the deformation theory simultaneous...
2010,
22.
Abstract:
To improve the power efficiency of the laser system, it is necessary to transform Gaussian intensity distribution to dark hollow intensity distribution. The phase-only liquid crystal spatial light modulator (LC-SLM) has been used to transform a quasi...
To improve the power efficiency of the laser system, it is necessary to transform Gaussian intensity distribution to dark hollow intensity distribution. The phase-only liquid crystal spatial light modulator (LC-SLM) has been used to transform a quasi...
2010,
22.
Abstract:
Based on the theory of interaction between laser and material, we analyze thermal characteristics of pulsed laser irradiated monocrystalline silicon. By setting up experiment equipment including a laser lamp-house, the laser wavelength is 1 064 nm, t...
Based on the theory of interaction between laser and material, we analyze thermal characteristics of pulsed laser irradiated monocrystalline silicon. By setting up experiment equipment including a laser lamp-house, the laser wavelength is 1 064 nm, t...
2010,
22.
Abstract:
This paper introduces the primary purpose, characteristics and coating methods of 1 572 nm narrow-band filters in the laser telemeter. The multiple-cavity filters with low loss and high reliability have been developed using the computer coating optim...
This paper introduces the primary purpose, characteristics and coating methods of 1 572 nm narrow-band filters in the laser telemeter. The multiple-cavity filters with low loss and high reliability have been developed using the computer coating optim...
2010,
22.
Abstract:
Characteristics of the temporal modulation riding on broad-band lasers stacked by chirped pulses are numerically investigated in nonlinear propagation. For the case of normal dispersion, the temporal modulations induced by interference among pulses a...
Characteristics of the temporal modulation riding on broad-band lasers stacked by chirped pulses are numerically investigated in nonlinear propagation. For the case of normal dispersion, the temporal modulations induced by interference among pulses a...
2010,
22.
Abstract:
The sodium laser guide star (LGS) technique which adopted range gating and common aperture mode was researched, and the projecting-detecting experiment was studied. The relationship between sodium resonance scattering and wavelength of beacon laser w...
The sodium laser guide star (LGS) technique which adopted range gating and common aperture mode was researched, and the projecting-detecting experiment was studied. The relationship between sodium resonance scattering and wavelength of beacon laser w...
2010,
22.
Abstract:
The propagation model of Laguerre-Gaussian beams in left-handed materials was established. Through the study of phase distribution, the rotation was found to be dependent on model parameters, Gouy phase, frequency, and dispersion. The azimuthal phase...
The propagation model of Laguerre-Gaussian beams in left-handed materials was established. Through the study of phase distribution, the rotation was found to be dependent on model parameters, Gouy phase, frequency, and dispersion. The azimuthal phase...
2010,
22.
Abstract:
A new method of defocus length detection based on optical modulator is presented after analyzing traditional detection methods. Using this method, the convergent beam is modulated with the piezoelectric ceramic driving deformable mirrors, and receive...
A new method of defocus length detection based on optical modulator is presented after analyzing traditional detection methods. Using this method, the convergent beam is modulated with the piezoelectric ceramic driving deformable mirrors, and receive...
2010,
22.
Abstract:
Numerical simulation was applied to the study of femto/ picosecond laser-target interaction by two-temperature equation with proper initial and boundary conditions. The influence of laser pulse shapes on the carrier and lattice temperatures on the su...
Numerical simulation was applied to the study of femto/ picosecond laser-target interaction by two-temperature equation with proper initial and boundary conditions. The influence of laser pulse shapes on the carrier and lattice temperatures on the su...
2010,
22.
Abstract:
The functionality of region-of interest(ROI) image edge detection is very important in applications where certain parts of the image are of higher importance than others. However, at present, most algorithms are designed for the whole image detection...
The functionality of region-of interest(ROI) image edge detection is very important in applications where certain parts of the image are of higher importance than others. However, at present, most algorithms are designed for the whole image detection...
2010,
22.
Abstract:
A noncollinear third-order autocorrelator was designed and manufactured for contrast ratio measurement of single shot picosecond pulses. Under the premise of obtaining correct cross-correlation signals during the parameters optimization, it was still...
A noncollinear third-order autocorrelator was designed and manufactured for contrast ratio measurement of single shot picosecond pulses. Under the premise of obtaining correct cross-correlation signals during the parameters optimization, it was still...
2010,
22.
Abstract:
The far-field anomalous spectral behaviors of a Gaussian pulsed beam passing through a linear circular apertures array are studied. By expanding a hard aperture function into a finite sum of complex Gaussian functions and starting from the Fresnel di...
The far-field anomalous spectral behaviors of a Gaussian pulsed beam passing through a linear circular apertures array are studied. By expanding a hard aperture function into a finite sum of complex Gaussian functions and starting from the Fresnel di...
2010,
22.
Abstract:
Based on the design scheme of spectral beam combining using transmitting volume Bragg grating, the experimental results for spectral beam combining of two fiber lasers are reported. The gain mediums used in this experiment were two large mode area er...
Based on the design scheme of spectral beam combining using transmitting volume Bragg grating, the experimental results for spectral beam combining of two fiber lasers are reported. The gain mediums used in this experiment were two large mode area er...
2010,
22.
Abstract:
In order to enhance the accuracy of laser Doppler velocimeter, the method to track the laser Doppler signal and correct the frequency spectrum with frequency spectrum refinement and frequency spectrum correction method was put forward. The Doppler si...
In order to enhance the accuracy of laser Doppler velocimeter, the method to track the laser Doppler signal and correct the frequency spectrum with frequency spectrum refinement and frequency spectrum correction method was put forward. The Doppler si...
2010,
22.
Abstract:
A two-cavity Fabry-Perot(F-P) structure is compared to the conventional F-P structure. The characteristics of transmission spectra for the conventional and the two-cavity F-P structures are theoretically analyzed. Based on the theoretical analysis, t...
A two-cavity Fabry-Perot(F-P) structure is compared to the conventional F-P structure. The characteristics of transmission spectra for the conventional and the two-cavity F-P structures are theoretically analyzed. Based on the theoretical analysis, t...
Numerical optimization of jet location in N2-chemical oxygen iodine laser without primary buffer gas
2010,
22.
Abstract:
3-D Navier-Stocks equation with multi species and chemical reaction process was applied with CFD method on the chemical oxygen iodine laser(COIL) model using nitrogen as diluents gas to investigate the detailed flow field and the coupling between phy...
3-D Navier-Stocks equation with multi species and chemical reaction process was applied with CFD method on the chemical oxygen iodine laser(COIL) model using nitrogen as diluents gas to investigate the detailed flow field and the coupling between phy...
2010,
22.
Abstract:
A selective laser melting (SLM) system equipped with fiber laser was designed to study the technical parameters, energy density, relative density, surface profile and characteristics of micro structures of 316L stainless steel powder. Results show th...
A selective laser melting (SLM) system equipped with fiber laser was designed to study the technical parameters, energy density, relative density, surface profile and characteristics of micro structures of 316L stainless steel powder. Results show th...
2010,
22.
Abstract:
The ion parameters, electronic parameters and its spatial distribution were measured respectively by ion-sensitive probe and double Langmuir probe on a non-symmetric magnetic mirror field ECR plasma apparatus. The effects of gas pressure on plasma pa...
The ion parameters, electronic parameters and its spatial distribution were measured respectively by ion-sensitive probe and double Langmuir probe on a non-symmetric magnetic mirror field ECR plasma apparatus. The effects of gas pressure on plasma pa...
2010,
22.
Abstract:
The measurement of the fraction of laser-entrance energy, which is carried out mainly through the measurement of scattering light, is very important in the measurement of coupling efficiency of the hohlraum. The angular distribution of scattering lig...
The measurement of the fraction of laser-entrance energy, which is carried out mainly through the measurement of scattering light, is very important in the measurement of coupling efficiency of the hohlraum. The angular distribution of scattering lig...
2010,
22.
Abstract:
Full-aperture backscatter station (FABS) installed on Shenguang-ⅡLaser Facility is reported. This diagnostic is a spatially averaged mix of light from all of the laser-plasma interactions in the field of view collected by the laser beam focusing lens...
Full-aperture backscatter station (FABS) installed on Shenguang-ⅡLaser Facility is reported. This diagnostic is a spatially averaged mix of light from all of the laser-plasma interactions in the field of view collected by the laser beam focusing lens...
2010,
22.
Abstract:
Poly(vincylcyclohexane) (PVCH) was prepared with polystyrene(PS) saturated using heterogeneous hydrogenation techniques. The structure of the synthesized polymers was characterized by means of FT-IR, 1H NMR spectroscopy and GPC, and the results show ...
Poly(vincylcyclohexane) (PVCH) was prepared with polystyrene(PS) saturated using heterogeneous hydrogenation techniques. The structure of the synthesized polymers was characterized by means of FT-IR, 1H NMR spectroscopy and GPC, and the results show ...
2010,
22.
Abstract:
According to the requirement of ICF, a method based on statistical theory has been proposed to measure the power spectrum density(PSD) of large aperture optical components. The method breaks the large-aperture wavefront into small regions, and obtain...
According to the requirement of ICF, a method based on statistical theory has been proposed to measure the power spectrum density(PSD) of large aperture optical components. The method breaks the large-aperture wavefront into small regions, and obtain...
2010,
22.
Abstract:
Nano TiO2 thin film produced by plasma-enhanced chemical vapor deposition method are deposited on the silicon substrate with the mixture of TiCl4 sources, argon and oxygen gases. Some technological parameters affecting the film performances are discu...
Nano TiO2 thin film produced by plasma-enhanced chemical vapor deposition method are deposited on the silicon substrate with the mixture of TiCl4 sources, argon and oxygen gases. Some technological parameters affecting the film performances are discu...
2010,
22.
Abstract:
An A-B-A insulation structure is proposed to improve the characteristics of surface flashover in vacuum by adjusting the conductivity and permittivity of layer A. According to the electric field theory of series dielectrics, the DC and pulsed field d...
An A-B-A insulation structure is proposed to improve the characteristics of surface flashover in vacuum by adjusting the conductivity and permittivity of layer A. According to the electric field theory of series dielectrics, the DC and pulsed field d...
2010,
22.
Abstract:
The paper reviews the recent worldwide research and application of transparent Nd:YAG laser ceramics, especially in the last two years, and focuses on the analysis of the recent research in China. It points out that the transparent Nd:YAG laser ceram...
The paper reviews the recent worldwide research and application of transparent Nd:YAG laser ceramics, especially in the last two years, and focuses on the analysis of the recent research in China. It points out that the transparent Nd:YAG laser ceram...
2010,
22.
Abstract:
To measure impact flash generated during hypervelocity impact and further investigate rules of impact flash intensity varying with time, which is generated by hypervelocity impact at close impact velocities and different incidence angles from target ...
To measure impact flash generated during hypervelocity impact and further investigate rules of impact flash intensity varying with time, which is generated by hypervelocity impact at close impact velocities and different incidence angles from target ...
2010,
22.
Abstract:
A theoretical analysis is carried out to study the evolution of a laser-induced plasma channel in air. The extended nonlinear Schr-dinger equation describing the propagation of laser pulses in air is presented and analyzed, which includes the influen...
A theoretical analysis is carried out to study the evolution of a laser-induced plasma channel in air. The extended nonlinear Schr-dinger equation describing the propagation of laser pulses in air is presented and analyzed, which includes the influen...
Optimization and experiment research of high power linearly polarized radial waveguide array antenna
2010,
22.
Abstract:
The performance affecting factors were analyzed to improve the high power linearlypolarized radial waveguide array antenna in its aperture efficiency, reflection and so on. Based on the analysis, three optimization approaches were adopted, i.e., imp...
The performance affecting factors were analyzed to improve the high power linearlypolarized radial waveguide array antenna in its aperture efficiency, reflection and so on. Based on the analysis, three optimization approaches were adopted, i.e., imp...
2010,
22.
Abstract:
Electromagnetic PIC simulation contains three key computational procedures: solving Maxwell’s equations, solving Lorentz equation and particle motion equation, updating charge density and current density. According to the characteristics of the three...
Electromagnetic PIC simulation contains three key computational procedures: solving Maxwell’s equations, solving Lorentz equation and particle motion equation, updating charge density and current density. According to the characteristics of the three...
2010,
22.
Abstract:
An improved shift operator finite-difference time-domain (SO-FDTD) method for the high order Debye, Drude, Lorentz and hybrid model dispersive media is presented. The susceptibility function of dispersive media is firstly represented as the sum of ra...
An improved shift operator finite-difference time-domain (SO-FDTD) method for the high order Debye, Drude, Lorentz and hybrid model dispersive media is presented. The susceptibility function of dispersive media is firstly represented as the sum of ra...
2010,
22.
Abstract:
In order to understand the response characteristics of induction voltage adder (IVA) to square pulses and find out some design philosophies of a compact, high efficient IVA system, theoretical analysis and experimental research are carried out. This ...
In order to understand the response characteristics of induction voltage adder (IVA) to square pulses and find out some design philosophies of a compact, high efficient IVA system, theoretical analysis and experimental research are carried out. This ...
2010,
22.
Abstract:
In order to decrease response time and improve accuracy of high-pulse current measurement, a new kind of ns-range Rogowski coil with closed magnetic core is developed. Important parameters are calculated and designed according to electromagnetic theo...
In order to decrease response time and improve accuracy of high-pulse current measurement, a new kind of ns-range Rogowski coil with closed magnetic core is developed. Important parameters are calculated and designed according to electromagnetic theo...
2010,
22.
Abstract:
This paper summarizes the design and test results of a four-bricks fast linear transformer driver (FLTD) stage. When the charge voltage of the stage is 160 kV, the output current is 103.4 kA, and the risetime is 78 ns(10%~90%). Discharge synchronizat...
This paper summarizes the design and test results of a four-bricks fast linear transformer driver (FLTD) stage. When the charge voltage of the stage is 160 kV, the output current is 103.4 kA, and the risetime is 78 ns(10%~90%). Discharge synchronizat...
2010,
22.
Abstract:
The analytic expression of output voltage, describing exactly the transient transmission process of the spiral Blumlein pulse forming line with a purely resistive load, has been derived by solving the telegraph equations with Laplace transform. The r...
The analytic expression of output voltage, describing exactly the transient transmission process of the spiral Blumlein pulse forming line with a purely resistive load, has been derived by solving the telegraph equations with Laplace transform. The r...
