Journals >Chinese Journal of Lasers
Contents
1991
Volume: 18 Issue 5
20 Article(s)
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Research Article
A vibrating stage with spring-support for testing recording characteristics of optical storage media
[in Chinese], [in Chinese], and [in Chinese]
Based on the principle of writing and reading of optical disks, a simple method is proposed for testing the recording characteristics of optical storage media. A vibrating stage of spring-support was employed for substituting the precision rotating motor in optical disks, so the dynamic test of optical storage media caBased on the principle of writing and reading of optical disks, a simple method is proposed for testing the recording characteristics of optical storage media. A vibrating stage of spring-support was employed for substituting the precision rotating motor in optical disks, so the dynamic test of optical storage media can be accomplished without auto-focusing and stacking control system. The recording characteristics of TeSeIn pkase change optical storage medium has been tested, the results showed that this method is simple and feasible..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 333 (1991)
Laser focusing system in laser-microbeam
[in Chinese], and [in Chinese]
In this paper a new laser focusing system is presented. Using this system in the laser-microbeam device, focal spot size of less then 1μm was easily obtained. This system composed of a spatial filter and a focusing objective lens with long working distance (l>9mm) and short focal length (f0≤3.25mm). Finally, the tesIn this paper a new laser focusing system is presented. Using this system in the laser-microbeam device, focal spot size of less then 1μm was easily obtained. This system composed of a spatial filter and a focusing objective lens with long working distance (l>9mm) and short focal length (f0≤3.25mm). Finally, the test results are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 337 (1991)
Misalignment sensitivity of a rectangularly crossed prism resonantor
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Formulae for misalignment sensitivity of a rectangularly crossed prism stable resonator are derived by means of transfer matrix methods. The results obtained ia this paper have shown theoretically that the prism resonator has the advantages of insensitivity to prism tilting and high mechanical stability.Formulae for misalignment sensitivity of a rectangularly crossed prism stable resonator are derived by means of transfer matrix methods. The results obtained ia this paper have shown theoretically that the prism resonator has the advantages of insensitivity to prism tilting and high mechanical stability..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 341 (1991)
Absolute evolution of real-atomic spectrum by a transmission grating
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A method of absolutely unfolding the atomic spectrum by a pinhole transmission grating spectrometer (PTG) is discussed in detail. Beal SXB spectra of aluminum, magnesium, and silicon plasmas are presented of experiments performed on the Six-Beam Facility in SIOM.A method of absolutely unfolding the atomic spectrum by a pinhole transmission grating spectrometer (PTG) is discussed in detail. Beal SXB spectra of aluminum, magnesium, and silicon plasmas are presented of experiments performed on the Six-Beam Facility in SIOM..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 348 (1991)
Ion-assisted deposition of optical thin films at different ion beam energies
[in Chinese], and [in Chinese]
Optical properties, laser-induced damage theresholds and microstroctares of IAD thin films at different energy bombardment were investigeted and analysed with TiO2 thin film as an example.Optical properties, laser-induced damage theresholds and microstroctares of IAD thin films at different energy bombardment were investigeted and analysed with TiO2 thin film as an example..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 353 (1991)
A real time method for Fourier transform holographic information storage
[in Chinese], [in Chinese], and [in Chinese]
A method is put forward by which the Fourier transform hologram is recorded in real time. By using the incoherence-coherence property of LCLV (liquid crystal light valve) as an image conversion device, documents and pictures can be stored directly in Fourier transform holography.A method is put forward by which the Fourier transform hologram is recorded in real time. By using the incoherence-coherence property of LCLV (liquid crystal light valve) as an image conversion device, documents and pictures can be stored directly in Fourier transform holography..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 385 (1991)
Design of optical path for microscopic holography
[in Chinese]
In this paper, design consideration of optical path for microscopic holography is presented. It doesn't need a big shockproof installation and a special holography mioroseope. Using a conventional bio-microscope and low powor He-Ne laser, a clear microscopic hologram can be obtained.In this paper, design consideration of optical path for microscopic holography is presented. It doesn't need a big shockproof installation and a special holography mioroseope. Using a conventional bio-microscope and low powor He-Ne laser, a clear microscopic hologram can be obtained..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 387 (1991)
A new definition of signal to noise ratio for an opticalIM transmitter
[in Chinese]
A new definition of signal to noise ratio (SNR) for an optical IM transmitter is presented taking into consideration of both the IM noise and the dynamic frequency shift. The effects of weak optical feedback on SNE are studied.A new definition of signal to noise ratio (SNR) for an optical IM transmitter is presented taking into consideration of both the IM noise and the dynamic frequency shift. The effects of weak optical feedback on SNE are studied..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 390 (1991)
Biomedical Photonics and Laser Medicine
Elffection on aorta irradiated by excimer laser
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The change of normal aorta wall irradiated by XeCl excimer laser were observed at various laser pulse energies and pulse repetition rates with different medium at the aortasurface.The change of normal aorta wall irradiated by XeCl excimer laser were observed at various laser pulse energies and pulse repetition rates with different medium at the aortasurface..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 377 (1991)
Experiments on improvement of myocardial microcirculation by laser myocardium
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Myocardial revascularrization by laser is a kind of operation which uses laser beam to converge on the surface of myocardium and punch from epicardium to endocardium. The blood in heart can directly make nutrition for myocardium. It is not neeessery to incise heart and put into bridging operation. Experimental results Myocardial revascularrization by laser is a kind of operation which uses laser beam to converge on the surface of myocardium and punch from epicardium to endocardium. The blood in heart can directly make nutrition for myocardium. It is not neeessery to incise heart and put into bridging operation. Experimental results are reported about punching minute holes in myocardium of animals (i. e pig, dog, or sheep) by CO2 laser to improve the myocardial microcirculation..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 397 (1991)
Laser Physics
Inhomogeneous distribution of electron density and strong X-ray emission by laser irradiated segmentedplanar target
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Characteristics of plasma produced by laser irradiated segmented planar targets show that there are inhomogeneous distribution of high electron density and strong X-ray emissi on in the gaps of segmented planar targets.Characteristics of plasma produced by laser irradiated segmented planar targets show that there are inhomogeneous distribution of high electron density and strong X-ray emissi on in the gaps of segmented planar targets..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 321 (1991)
Refractive index measurement of Nd:MgO:LiNbO3crystal and its self-frequency-doubled laser at room temperature
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Eefractive index measurement of the Nd: MgO: LiNbO3 crystal and its self-frequency doubled laser at room temperature are reported for the first time. Net SHG green output at 400μJ/shot has been obtained with a small Xe lamp pump at 26 ℃. The threshold pump energy ia smaller than 4.8 J. The laser operates over 25-45 ℃ NEefractive index measurement of the Nd: MgO: LiNbO3 crystal and its self-frequency doubled laser at room temperature are reported for the first time. Net SHG green output at 400μJ/shot has been obtained with a small Xe lamp pump at 26 ℃. The threshold pump energy ia smaller than 4.8 J. The laser operates over 25-45 ℃ No photorefractive damage was observed..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 324 (1991)
Experimental studies of semiconductor laser with AlN films
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Experimental reaulst for semiconductor lasers with facet antireflector and surface passivator by sputtered A1N films are reported for the first time. The results show that these LD with sputtered A1N film as surface passivator have good lasing properties.Experimental reaulst for semiconductor lasers with facet antireflector and surface passivator by sputtered A1N films are reported for the first time. The results show that these LD with sputtered A1N film as surface passivator have good lasing properties..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 324 (1991)
Experimental study of factor affecting enhancement of SERS spectra in nonaqueous electrochemical system
[in Chinese], [in Chinese], and [in Chinese]
We present in this paper the study of surface enhanced Raman scattering (SERS) spectra of imidazole adsorbed on the electrochemical roughened silver electrode surface in nonaqueous methanol and the potential and laser luminous time dependence of the SEBS spectra. We also detected the morphology of the silver electrode We present in this paper the study of surface enhanced Raman scattering (SERS) spectra of imidazole adsorbed on the electrochemical roughened silver electrode surface in nonaqueous methanol and the potential and laser luminous time dependence of the SEBS spectra. We also detected the morphology of the silver electrode surface and studied some mechanism of SEBS effect of imidazole adsorbed on the silver electrode in nonaqueous system..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 357 (1991)
Dynamic characteristics of weak scattering produced far Gaussian speckle field
[in Chinese], [in Chinese], and [in Chinese]
The time-spatial cross-correlation coefficient of the intensity fluctuation of the speckle is calculated for three surface correlation in ease of moving weak scatterer. The dynamic characteristics of far Gaussian speckle field are considered by using the parameters "non-circularity" and "bunch ratio"The time-spatial cross-correlation coefficient of the intensity fluctuation of the speckle is calculated for three surface correlation in ease of moving weak scatterer. The dynamic characteristics of far Gaussian speckle field are considered by using the parameters "non-circularity" and "bunch ratio" and their dependence with the cross-correlation coefficient. A method capable of measuring the moving speed of the weak seatterer is put forward..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 361 (1991)
Saturable absorption of semiconductor-doped glasses irradiated with sub-picosecond pulses
[in Chinese], [in Chinese], and [in Chinese]
Employing intense laser beams at 616 nm and 750 fs pulse width, we measured the saturable absorptive property of Schott filters RG645 made of semiconductor doped glass, and observed clearly self-focusing during the beam passed through the sample at high power densities.Employing intense laser beams at 616 nm and 750 fs pulse width, we measured the saturable absorptive property of Schott filters RG645 made of semiconductor doped glass, and observed clearly self-focusing during the beam passed through the sample at high power densities..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 368 (1991)
Autler-Townes effect in uranium HCD
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
We calculated the Autler-Townes effectinuranium by uaing dressed atom model and distribution function. We also detected the effect in the uranium HCD, which is in agreement with the theoretical result. From this we can know more about the behavior of uranium atom in strong field.We calculated the Autler-Townes effectinuranium by uaing dressed atom model and distribution function. We also detected the effect in the uranium HCD, which is in agreement with the theoretical result. From this we can know more about the behavior of uranium atom in strong field..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 370 (1991)
A study of infrared laser-initiated polymerization of methyl methacrylate
[in Chinese], [in Chinese], and [in Chinese]
The polymerization behaviours of methyl methaerylate monomers is described under the irradiation of CO2 laser light, and the polymer products are analysed with infrared spectrograph and high pressure liquid phase chromategraph. The results show that MMA can be polymerized based on free-radical type or anionic type mechThe polymerization behaviours of methyl methaerylate monomers is described under the irradiation of CO2 laser light, and the polymer products are analysed with infrared spectrograph and high pressure liquid phase chromategraph. The results show that MMA can be polymerized based on free-radical type or anionic type mechanisms at different irradiation durations..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 374 (1991)
Additional phase shift of resonant field in optical fiber lasers
[in Chinese], and [in Chinese]
In optical fiber lasers, the electromagnetic field is confined by the reflecting mirrors of the laser cavity and the fiber waveguide. As in the bulk laser cavity, there is an additional phase shift in the laser beam as it resonates in the fiber laser eavity.In optical fiber lasers, the electromagnetic field is confined by the reflecting mirrors of the laser cavity and the fiber waveguide. As in the bulk laser cavity, there is an additional phase shift in the laser beam as it resonates in the fiber laser eavity..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 381 (1991)
UV laser cooling of magnesium atomic beam
[in Chinese], [in Chinese], and [in Chinese]
We reported an experiment of cooling Mg atomic beam by a UV laser and experimental results are given.We reported an experiment of cooling Mg atomic beam by a UV laser and experimental results are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 18, Issue 5, 394 (1991)
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