Journals >Chinese Journal of Lasers
Contents
1991
Volume: 18 Issue 1
18 Article(s)
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Research Article
Experimental study for evaluating image quality of X-ray focusing mirror used in beamline-3 at BEPC using 632.8 nm visible light
[in Chinese], [in Chinese], and [in Chinese]
Measurements of point spread function (PSF) of the focusing X-ray cylindrical mirror on different bending status is described and comparision of the calculated model with the tested results is made and the light intensity distribution of image point at different diaphragm dimensions a given.Measurements of point spread function (PSF) of the focusing X-ray cylindrical mirror on different bending status is described and comparision of the calculated model with the tested results is made and the light intensity distribution of image point at different diaphragm dimensions a given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 21 (1991)
Spatially resolved XUV spectral technique for laser-produced plasmas
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The principle, parameters and experimental results of the toroidal mirror-grazing incidence grating spectrograph system used for obtaining spatially resolved XUV spectra of laser plasma are described, and the merits and demerits of this toroidal mirror technique and the orossed-slit technique are discussed.The principle, parameters and experimental results of the toroidal mirror-grazing incidence grating spectrograph system used for obtaining spatially resolved XUV spectra of laser plasma are described, and the merits and demerits of this toroidal mirror technique and the orossed-slit technique are discussed..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 26 (1991)
Wavelength effects on laser induced optical thin film damage
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Laser damage threshold and their morphologies are reported of ZrO2, TiO2 and Ti3O5 single and multilayers at 1.06μm, 0.53μm and 0.35 μm with a pulsewidth of 10 ns in TEM00 mode. It is found that the damage threshold is directly proportional to λ 1.2-1.5.Laser damage threshold and their morphologies are reported of ZrO2, TiO2 and Ti3O5 single and multilayers at 1.06μm, 0.53μm and 0.35 μm with a pulsewidth of 10 ns in TEM00 mode. It is found that the damage threshold is directly proportional to λ 1.2-1.5..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 30 (1991)
Lifetime measurement of Cu metastable states by meansof HCD lamp
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The lifetime of Cu metastable states 2D3/2 and 2D5/2 are obtained by measuringthe laser-induced fluorescence dependence of delay time on the narrow pulse discharge HCD lamps. This method is simple and has other advantages and great potential.The lifetime of Cu metastable states 2D3/2 and 2D5/2 are obtained by measuringthe laser-induced fluorescence dependence of delay time on the narrow pulse discharge HCD lamps. This method is simple and has other advantages and great potential..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 75 (1991)
Biomedical Photonics and Laser Medicine
[in Chinese]
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 71 (1991)
Effects of He-Ne laser irradiation on antibody forming cell in mice
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
QHS and SRFC were applied to observe the effects of He-Ne laser irradiation on AFC in mice. The results show the spleen region in mice irradiated by He-Ne laser at three-different power levels can increase antibody forming cell activities. The laser irradiated groupwas compared with that of the noemal control group, thQHS and SRFC were applied to observe the effects of He-Ne laser irradiation on AFC in mice. The results show the spleen region in mice irradiated by He-Ne laser at three-different power levels can increase antibody forming cell activities. The laser irradiated groupwas compared with that of the noemal control group, the difference waa highly significant (P <0.01). The resluts show that laser may have some immunoreguation action..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 77 (1991)
Holography and Information Processing
Optical parallel array logic based on spatial amplitude encoding pattern method for optical digital computing
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
This paper presents the principle and the features of a new spatial amplitude encoding pattern method implementing optical parallel array logic gates. A systematic algorithm is also presented for designing high speed combinational logic operation in parallel and the physical concept of AND and OB array gates is clarifiThis paper presents the principle and the features of a new spatial amplitude encoding pattern method implementing optical parallel array logic gates. A systematic algorithm is also presented for designing high speed combinational logic operation in parallel and the physical concept of AND and OB array gates is clarified. Experimental results for 16 combinational logic operation in an 8f coherent optical processing system are shown..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 56 (1991)
Complementary-encoding truth table look-Up processing for calculation of complex multinomals
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The calculation of a complex-multinomial is discussed and a new optical method performing truth-table look-up processing is proposed. Adopting complementary-encoding of light intensity and volume holography, a content-addressable optical holography truth table look-up system based on the NAND operation is structured. TThe calculation of a complex-multinomial is discussed and a new optical method performing truth-table look-up processing is proposed. Adopting complementary-encoding of light intensity and volume holography, a content-addressable optical holography truth table look-up system based on the NAND operation is structured. The experimental study results which prove the system feasible are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 63 (1991)
Vibration measurement of objects by using holographic double-frequency grating
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
When a laser beam is incident onto a double-frequency holographic grating attached on a vibrating object, the intensity in the first order diffraction is modulated by the vibration. In this paper, the principle and some experimental results of this method are presented, and a brief discussion about the prospects of itsWhen a laser beam is incident onto a double-frequency holographic grating attached on a vibrating object, the intensity in the first order diffraction is modulated by the vibration. In this paper, the principle and some experimental results of this method are presented, and a brief discussion about the prospects of its applications is given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 68 (1991)
Laser Physics
Pulsed slab Nd: YAG laser
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Pulsed operation of a 126×12×6mm3 Nd:YAG slab laser is deseribed. The output energy from the free-running o scillator is 24J/shot with an efficiency of 2.5%, and that from the Q-switched laser is 860mJ/shot with a pulse width of 12-15ns and a switching efficiency of 72%.Pulsed operation of a 126×12×6mm3 Nd:YAG slab laser is deseribed. The output energy from the free-running o scillator is 24J/shot with an efficiency of 2.5%, and that from the Q-switched laser is 860mJ/shot with a pulse width of 12-15ns and a switching efficiency of 72%..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 1 (1991)
Measurement of population densities in a copper-bromide discharge tube
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Methods is deeribed of amplification and absorption at 578.2nm transition line with a CW stable ring dye laser light going through a copper-bromide discharge tube and the population densities of 2P1/2 and 2D3/2 levels are obtained. Inverse densities of upper and lower levels concerning 578.2nm transition line with variMethods is deeribed of amplification and absorption at 578.2nm transition line with a CW stable ring dye laser light going through a copper-bromide discharge tube and the population densities of 2P1/2 and 2D3/2 levels are obtained. Inverse densities of upper and lower levels concerning 578.2nm transition line with variable output power is obtained by the yellow light self-amplification method..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 5 (1991)
Soft X-ray amplification in lithium-like silicon ions
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Results of the recombination pumped soft X-ray laser gain experiment of L-like silicon ions are described. The spectra from line-focused laser plasmas on slab silicon targets in 5-12nm region are taken by an 1m unastigmatic grazing incidence grating spectro-graph. The gain coefficients of Si11+5f-3d(8.89nm) and 5d-3p(8Results of the recombination pumped soft X-ray laser gain experiment of L-like silicon ions are described. The spectra from line-focused laser plasmas on slab silicon targets in 5-12nm region are taken by an 1m unastigmatic grazing incidence grating spectro-graph. The gain coefficients of Si11+5f-3d(8.89nm) and 5d-3p(8.73nm), deduced from the ratio of on-axis to off-axis time-integrated intensity are 1.4cm-1 and 0.9 cm-1, respectively; The corresponding gain coefficients deduced from the growth curve of on-axis intensity with the length of th eline-focused laser plasma are 1.5 cm-1 and 1.4 cm-1, respectively..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 9 (1991)
Optical transitions and laser operation of Er3+ions in phosphate glass
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
he experimental and calculation results of speetroscopic parameters (σp, Ar, β, τ r) of Er3+ ions in Li-Al phosphate glass are given. Efficient energy transfer from chromium via ytterbium to erbium is reported and laser output energy of 3J at 1.54um (300K) is obtained.he experimental and calculation results of speetroscopic parameters (σp, Ar, β, τ r) of Er3+ ions in Li-Al phosphate glass are given. Efficient energy transfer from chromium via ytterbium to erbium is reported and laser output energy of 3J at 1.54um (300K) is obtained..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 16 (1991)
Two different conical emissions
[in Chinese], [in Chinese], and [in Chinese]
We report here for the first time the experimental observations of two different conical emissions induced during the near resonant propagation of a CW laser in atomic Na vapor, and discuss the physical mechanism for their appearance.We report here for the first time the experimental observations of two different conical emissions induced during the near resonant propagation of a CW laser in atomic Na vapor, and discuss the physical mechanism for their appearance..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 34 (1991)
Double-directional ring oscillation produced by photorefra-ctive scattering in self-pumped BaTiO3
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Bing osoillation produced by amplified scattering and the frequency shift of phase conjugate wave in self-pumped BaTiO3 crystals are reported. The ring oscillator with photorefractive gain is analysed by means of Lamb's semiclassical theory. The theoretical analysis explains reasonably the experimental results.Bing osoillation produced by amplified scattering and the frequency shift of phase conjugate wave in self-pumped BaTiO3 crystals are reported. The ring oscillator with photorefractive gain is analysed by means of Lamb's semiclassical theory. The theoretical analysis explains reasonably the experimental results..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 38 (1991)
Research of electron density steepening and dip structure in the corona of laser-plasmas
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
From two dimensional steady state plasma fluid equations, assuming a balance of radial electron thermal pressure and radial pondermotive force in the cyliudrical symmetrio distribution of electron density in laser irradiated region, the analytical results have been deduced of radial electron density dip structure in thFrom two dimensional steady state plasma fluid equations, assuming a balance of radial electron thermal pressure and radial pondermotive force in the cyliudrical symmetrio distribution of electron density in laser irradiated region, the analytical results have been deduced of radial electron density dip structure in the laser field region and the axial electron density profile steepening near the critical density due to the pondermotive force. The analytical results are consistent with the experimental results measured by a 266 nm UV optical pbobe..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 45 (1991)
Soft X-ray spectrum of Y-Mo laser-produced plasma
[in Chinese], [in Chinese], and [in Chinese]
Using T1AP and PET crystal spectrograph, we analysed the soft X-ray spectrum of Y-Mo laser-produced plasma, and found that the spectral lines are emmitted by Y-Mo Ne-like ions with similar structure. In addition, we also analysed and classified the soft X-ray spectra of Na-like isoeleetronic sequences of these elementsUsing T1AP and PET crystal spectrograph, we analysed the soft X-ray spectrum of Y-Mo laser-produced plasma, and found that the spectral lines are emmitted by Y-Mo Ne-like ions with similar structure. In addition, we also analysed and classified the soft X-ray spectra of Na-like isoeleetronic sequences of these elements..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 51 (1991)
Observation of superradiance from F2-and F+3-centers in LiF crystals
[in Chinese], and [in Chinese]
The multi-direction superradiances of F3+ centers, F2 centers and F3++F2 centers in LiF crystals were observed using a pulsed dye laser as the pumping source.The multi-direction superradiances of F3+ centers, F2 centers and F3++F2 centers in LiF crystals were observed using a pulsed dye laser as the pumping source..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 1, 72 (1991)
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