Email alert
RSS2007 Vol. 19, No. 12
Recommend Articles
Display Method:
2007,
19.
Abstract:
By using Fourier optics analyzing method, the expression to the far field of combined beams is deduced and the expressions for the coherently combined beams emitted from sources positioned on the circle have been given. For the cases where the source...
By using Fourier optics analyzing method, the expression to the far field of combined beams is deduced and the expressions for the coherently combined beams emitted from sources positioned on the circle have been given. For the cases where the source...
2007,
19.
Abstract:
This paper reported that the peak intensity values of spectra are in direct ratio with corresponding species’ concentration values. Major plasma-kinetic processes and concentration varieties of major species with varied flow conditions and discharge ...
This paper reported that the peak intensity values of spectra are in direct ratio with corresponding species’ concentration values. Major plasma-kinetic processes and concentration varieties of major species with varied flow conditions and discharge ...
2007,
19.
Abstract:
Based on the interferential theory and diffraction integral theory, the propagation characteristic of Bessel beam generated by an axicon was studied. The applicability and advantages of the theories were discussed as well. The 3-D beam intensity dist...
Based on the interferential theory and diffraction integral theory, the propagation characteristic of Bessel beam generated by an axicon was studied. The applicability and advantages of the theories were discussed as well. The 3-D beam intensity dist...
2007,
19.
Abstract:
A theoretical analysis on Z-scan using Gaussian-Schell model beam is reported. The influences of aperture radius and degree of spatial coherence on the Z-scan curves are studied. It is found that the effect of aperture radius on the Z-scan curves is ...
A theoretical analysis on Z-scan using Gaussian-Schell model beam is reported. The influences of aperture radius and degree of spatial coherence on the Z-scan curves are studied. It is found that the effect of aperture radius on the Z-scan curves is ...
2007,
19.
Abstract:
Based on the technology of wavelength beam combining, this paper applies the diffraction of the grating and the feedback of the external cavity to demonstrate all elements of the diode laser array(LDA) locked in different wavelength, the neighboring ...
Based on the technology of wavelength beam combining, this paper applies the diffraction of the grating and the feedback of the external cavity to demonstrate all elements of the diode laser array(LDA) locked in different wavelength, the neighboring ...
2007,
19.
Abstract:
Based on the theories of phase matching and acceptable composition ratio, the influence of composition ratio on the frequency conversions of CdGe(As1-xPx)2 was investigated. In consideration of Sellmeier equations, phase matching diagrams of second h...
Based on the theories of phase matching and acceptable composition ratio, the influence of composition ratio on the frequency conversions of CdGe(As1-xPx)2 was investigated. In consideration of Sellmeier equations, phase matching diagrams of second h...
2007,
19.
Abstract:
Establishing the rate equation model and thermal stress model of Yb-doped double-clad fiber lasers(DCFL), the key parameters impacting the stimulated Raman scattering(SRS) and thermal stress (such as the radius of core, the fiber length, the pump wav...
Establishing the rate equation model and thermal stress model of Yb-doped double-clad fiber lasers(DCFL), the key parameters impacting the stimulated Raman scattering(SRS) and thermal stress (such as the radius of core, the fiber length, the pump wav...
2007,
19.
Abstract:
The scaling laws about DF high energy laser propagation in real atmosphere are numerically analyzed by the four-dimension code of high energy laser in atmosphere combined with the square root of the sum of squares hypothesis. The scaling relations of...
The scaling laws about DF high energy laser propagation in real atmosphere are numerically analyzed by the four-dimension code of high energy laser in atmosphere combined with the square root of the sum of squares hypothesis. The scaling relations of...
2007,
19.
Abstract:
A method based on fractional Talbot effect is studied for single-shot measurement of laser-induced damage threshold. Using hexagonal phase grating, a laser beam is transformed into an ensemble of Gaussian-like spots with different energy densities at...
A method based on fractional Talbot effect is studied for single-shot measurement of laser-induced damage threshold. Using hexagonal phase grating, a laser beam is transformed into an ensemble of Gaussian-like spots with different energy densities at...
2007,
19.
Abstract:
A Hartmann wavefront sensor is applied to measuring the aero-optical aberrated wavefronts when the collimated light beam passes through a low speed heated turbulent jet. Proper orthogonal decomposition(POD) technique is applied to the aberraed wavefr...
A Hartmann wavefront sensor is applied to measuring the aero-optical aberrated wavefronts when the collimated light beam passes through a low speed heated turbulent jet. Proper orthogonal decomposition(POD) technique is applied to the aberraed wavefr...
2007,
19.
Abstract:
New form of Mie series which is suitable for particle scattering in an absorbing medium is demonstrated. Both single-bubble-scattering properties and phase function of bubbles in the absorbing sea water are researched based on Mie theory. At the same...
New form of Mie series which is suitable for particle scattering in an absorbing medium is demonstrated. Both single-bubble-scattering properties and phase function of bubbles in the absorbing sea water are researched based on Mie theory. At the same...
2007,
19.
Abstract:
Experiments have been performed to measure the temperature rise of Ta2O5/SiO2 multilayer coatings with substrate sapphire, fused silica and K9 at repetition rate 10 kHz, 1 064 nm pulse laser. Results calculated by ANSYS agree well with the experiment...
Experiments have been performed to measure the temperature rise of Ta2O5/SiO2 multilayer coatings with substrate sapphire, fused silica and K9 at repetition rate 10 kHz, 1 064 nm pulse laser. Results calculated by ANSYS agree well with the experiment...
2007,
19.
Abstract:
By theoretical analysis and simulation,laser -induced damage mechanisms of fiber’s end face, entry segment and fiber inside are studied. The admixtures and defects on the fiber end face induce the damage; the first reflections along the fiber core/cl...
By theoretical analysis and simulation,laser -induced damage mechanisms of fiber’s end face, entry segment and fiber inside are studied. The admixtures and defects on the fiber end face induce the damage; the first reflections along the fiber core/cl...
2007,
19.
Abstract:
On the basis of active imaging model of CW laser and range-gated, it is proved that range-gated technique is an effective method for restraining the influence of back-scattering in terms of single CCD cell SNR(single noise ratio) and image MSE(mean s...
On the basis of active imaging model of CW laser and range-gated, it is proved that range-gated technique is an effective method for restraining the influence of back-scattering in terms of single CCD cell SNR(single noise ratio) and image MSE(mean s...
2007,
19.
Abstract:
An incident coordinate system was set up on the basis of the incident direction and normal direction on crystal surface. Using the inverse surface equation of wave normals and the boundary condition about the continuity of electromagnetic field tange...
An incident coordinate system was set up on the basis of the incident direction and normal direction on crystal surface. Using the inverse surface equation of wave normals and the boundary condition about the continuity of electromagnetic field tange...
2007,
19.
Abstract:
Coherent combining of two self-organized fiber lasers is investigated theoretically and experimentally. It is shown that fiber lasers can be coherently combined using self-coherence by mutual injection， and the experimental combining efficiency can r...
Coherent combining of two self-organized fiber lasers is investigated theoretically and experimentally. It is shown that fiber lasers can be coherently combined using self-coherence by mutual injection， and the experimental combining efficiency can r...
2007,
19.
Abstract:
A novel method of aerial extended target detection based on pulse coupled neural network (PCNN) is presented. Some key techniques are improved and network model is simplified, which are more suitable for image processing, such as linear modulation, l...
A novel method of aerial extended target detection based on pulse coupled neural network (PCNN) is presented. Some key techniques are improved and network model is simplified, which are more suitable for image processing, such as linear modulation, l...
2007,
19.
Abstract:
The influence of temperature on the spectra and nonlinear optics properties of the 4(nitro) 4′aminoazobenzene compound Langmuir-Blodgett(LB)films were investigated using UV visible absorption spectra and second harmonic generation (SHG) technique. Th...
The influence of temperature on the spectra and nonlinear optics properties of the 4(nitro) 4′aminoazobenzene compound Langmuir-Blodgett(LB)films were investigated using UV visible absorption spectra and second harmonic generation (SHG) technique. Th...
2007,
19.
Abstract:
The hot uniform aluminium plasma was produced by irradiating thin aluminium dotted foil smoothly with the 9th 0.53 μm laser on Shenguang Ⅱ laser facility. The emitted spectrum was measured from the front and tangential direction of the target with tw...
The hot uniform aluminium plasma was produced by irradiating thin aluminium dotted foil smoothly with the 9th 0.53 μm laser on Shenguang Ⅱ laser facility. The emitted spectrum was measured from the front and tangential direction of the target with tw...
2007,
19.
Abstract:
Films are usually annealed to ameliorate their structure and improve mechanical properties in need of inertial confinement fusion(ICF) and equation of state(EOS) experiment and procedure of target assembly. Ni films with surface root mean square roug...
Films are usually annealed to ameliorate their structure and improve mechanical properties in need of inertial confinement fusion(ICF) and equation of state(EOS) experiment and procedure of target assembly. Ni films with surface root mean square roug...
2007,
19.
Abstract:
According to quasi-phase matching relationship between the second harmonic center wavelength and the grating period length of periodically poled crystal, a new experimental method to measure the grating period of periodically poled crystal accurately...
According to quasi-phase matching relationship between the second harmonic center wavelength and the grating period length of periodically poled crystal, a new experimental method to measure the grating period of periodically poled crystal accurately...
2007,
19.
Abstract:
The foamed nickel was synthesized by electrodeposition technique. The effect of current density, temperature, duty cycle and pulse frequency on crystal texture and magnetic properties of deposits were studied. The structure and micro-morphology were ...
The foamed nickel was synthesized by electrodeposition technique. The effect of current density, temperature, duty cycle and pulse frequency on crystal texture and magnetic properties of deposits were studied. The structure and micro-morphology were ...
2007,
19.
Abstract:
A mathematical model was developed to investigate the complex physical process of laser plasma interaction, adopting the PIC(particle-in-cell) approach to study the phenomena when heterogeneous ultra-short and ultra-high laser pulse propagated throug...
A mathematical model was developed to investigate the complex physical process of laser plasma interaction, adopting the PIC(particle-in-cell) approach to study the phenomena when heterogeneous ultra-short and ultra-high laser pulse propagated throug...
2007,
19.
Abstract:
Beijing Synchrotron Radiation Facility(BSRF)-3W1B beam line was used to calibrate the reffectivint of some multilayer mirrors. The wavelength-scanning method is adopted to get the multilayer mirrors' reflectirity-energy curves. The reflectivity calib...
Beijing Synchrotron Radiation Facility(BSRF)-3W1B beam line was used to calibrate the reffectivint of some multilayer mirrors. The wavelength-scanning method is adopted to get the multilayer mirrors' reflectirity-energy curves. The reflectivity calib...
2007,
19.
Abstract:
Traditional digital filter method and Birge-Massart threshold wavelet method were used to study the denoisng of lightning transient electrical signals. The mean square error and magnitude error of simulation signals were calculated to compare the den...
Traditional digital filter method and Birge-Massart threshold wavelet method were used to study the denoisng of lightning transient electrical signals. The mean square error and magnitude error of simulation signals were calculated to compare the den...
2007,
19.
Abstract:
The resonant cavity reflector has been used in the backward wave oscillators for producing multi-gigawatt power and operating at low magnetic field. The reflection characteristics of the “cold ” resonant cavity reflector is analyzed by means of the m...
The resonant cavity reflector has been used in the backward wave oscillators for producing multi-gigawatt power and operating at low magnetic field. The reflection characteristics of the “cold ” resonant cavity reflector is analyzed by means of the m...
2007,
19.
Abstract:
The guidance conditions of a slab waveguide of uniaxially anisotropic metamaterial with partially negative components in permittivity and permeability tensors are derived. In terms of the combination of component signs, the even mode properties for g...
The guidance conditions of a slab waveguide of uniaxially anisotropic metamaterial with partially negative components in permittivity and permeability tensors are derived. In terms of the combination of component signs, the even mode properties for g...
2007,
19.
Abstract:
This paper presents a formally exact solution (mode-matching method) to the problem of scattering at the junction between a small coaxial line and a large rectangular waveguide. The eigen-mode functions for both coaxial line and rectangular waveguide...
This paper presents a formally exact solution (mode-matching method) to the problem of scattering at the junction between a small coaxial line and a large rectangular waveguide. The eigen-mode functions for both coaxial line and rectangular waveguide...
2007,
19.
Abstract:
As the beam is too narrow in the application of the ultra-wideband (UWB) antenna with single-source, a novel wide-beam UWB paraboloidal antenna with dual-source has been designed. The novel paraboloid was improved from an original paraboliod, which w...
As the beam is too narrow in the application of the ultra-wideband (UWB) antenna with single-source, a novel wide-beam UWB paraboloidal antenna with dual-source has been designed. The novel paraboloid was improved from an original paraboliod, which w...
2007,
19.
Abstract:
A (2M, 4) scheme of the high-order finite-difference time-domain (FDTD) method based on the second order wave equation is proposed. This scheme is of the fourth order accuracy in time domain using the symplectic integrator propagator (SIP), and is of...
A (2M, 4) scheme of the high-order finite-difference time-domain (FDTD) method based on the second order wave equation is proposed. This scheme is of the fourth order accuracy in time domain using the symplectic integrator propagator (SIP), and is of...
2007,
19.
Abstract:
When the sheet electron beam is transmitting in solenoid magnetic fields, Diocotron mode or Diocotron instability comes into being, which could lead to collapse of beam propagation. In this paper, Diocotron mode theory is derived from Maxwell equatio...
When the sheet electron beam is transmitting in solenoid magnetic fields, Diocotron mode or Diocotron instability comes into being, which could lead to collapse of beam propagation. In this paper, Diocotron mode theory is derived from Maxwell equatio...
2007,
19.
Abstract:
For calculating the coaxial line responses in X rays environment, transmission line (TL) method and finite difference time domain (FDTD) method are presented up respectively. Using charges of the central wire, distributed charge in insulation and the...
For calculating the coaxial line responses in X rays environment, transmission line (TL) method and finite difference time domain (FDTD) method are presented up respectively. Using charges of the central wire, distributed charge in insulation and the...
2007,
19.
Abstract:
HfO2 films have been deposited by electron beam evaporation of hafnium oxide, reactive evaporation without ion beam assistance and reactive ion beam assisted deposition(RIBAD). Optical and structural properties and laser-induced damage threshold(LIDT...
HfO2 films have been deposited by electron beam evaporation of hafnium oxide, reactive evaporation without ion beam assistance and reactive ion beam assisted deposition(RIBAD). Optical and structural properties and laser-induced damage threshold(LIDT...
2007,
19.
Abstract:
Lead zirconate titanate(PZT) ferroelectric materials were prepared by the traditional solid phase reaction method, and the passive capacitors of parallel slab were processed. At last the total dose radiation effect on the PZT ferroelectric material c...
Lead zirconate titanate(PZT) ferroelectric materials were prepared by the traditional solid phase reaction method, and the passive capacitors of parallel slab were processed. At last the total dose radiation effect on the PZT ferroelectric material c...
2007,
19.
Abstract:
It is a traditional method to diagnose electron-cyclotron-resonance (ECR) plasma source, using a single probe to measure the current-voltage curve of the plasma, based on which and theoretic formula the plasma density can be computed. The article ado...
It is a traditional method to diagnose electron-cyclotron-resonance (ECR) plasma source, using a single probe to measure the current-voltage curve of the plasma, based on which and theoretic formula the plasma density can be computed. The article ado...
2007,
19.
Abstract:
Construction of an undulator includes magnet block measurement, sorting, field measurement and adjustment. Optimizing SDUV-FEL undulator by simulated annealing algorithm using measurement results of the magnet blocks by Helmholtz coil before installi...
Construction of an undulator includes magnet block measurement, sorting, field measurement and adjustment. Optimizing SDUV-FEL undulator by simulated annealing algorithm using measurement results of the magnet blocks by Helmholtz coil before installi...
2007,
19.
Abstract:
Utilizing one accelerator to produce dual or multi-beam electrons has the advantages of high synchronization, high efficiency, and high power, which is the key technique for microwave power combining. The intense dual-beam was simulated with diode im...
Utilizing one accelerator to produce dual or multi-beam electrons has the advantages of high synchronization, high efficiency, and high power, which is the key technique for microwave power combining. The intense dual-beam was simulated with diode im...
2007,
19.
Abstract:
The opening process of long conduction time plasma opening switch has been studied by particle-in-cell simulation. The building of computing model and complex boundaries is introducedin detail. Simulation results reveal the opening gap formation proc...
The opening process of long conduction time plasma opening switch has been studied by particle-in-cell simulation. The building of computing model and complex boundaries is introducedin detail. Simulation results reveal the opening gap formation proc...
2007,
19.
Abstract:
With the indirect-feed two-step helicalexplosivemagnetic generator as the initial power source, on the basis of the equivalent circuit pattern, we establish a program named BCYSSYS. The inductance load of the type 04 explosive-magnetic generator wa...
With the indirect-feed two-step helicalexplosivemagnetic generator as the initial power source, on the basis of the equivalent circuit pattern, we establish a program named BCYSSYS. The inductance load of the type 04 explosive-magnetic generator wa...
