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RSS1991 Vol. 15, No. 2
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1991, 15(2): 65-70.
[Abstract]
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Abstract:
In this paper,it is pointed out that the name of "co-cavity and multipass laser" is incorrect,all the oscillating cavities are not in cocavity,surface lattice light sources seperated in space from multipass laser are not time serial and not coherent each other,in addition,there is a strong fluctuation between two pulses seperated in time and space and produced with passive dye Q-switch and trigger synchronous delay.At the same time,in this paper,it is considered that the key problems of time serial high speed framing have not solved successfully in the "serial pulsed laser instantaneous holography instrument" and quantitative measurement can not be made with it.
In this paper,it is pointed out that the name of "co-cavity and multipass laser" is incorrect,all the oscillating cavities are not in cocavity,surface lattice light sources seperated in space from multipass laser are not time serial and not coherent each other,in addition,there is a strong fluctuation between two pulses seperated in time and space and produced with passive dye Q-switch and trigger synchronous delay.At the same time,in this paper,it is considered that the key problems of time serial high speed framing have not solved successfully in the "serial pulsed laser instantaneous holography instrument" and quantitative measurement can not be made with it.
1991, 15(2): 71-72.
Abstract:
This paper reports that Ti,Mg:LiNbO3 crystal grown by Czochralski method has been used for two-pass intracavity fre-quency doubling of 1.064μm radiation of a Q-switched Nd:YAG laser for the first time to our knowledge.The energy conversion efficiency of 61% has been obtained.
This paper reports that Ti,Mg:LiNbO3 crystal grown by Czochralski method has been used for two-pass intracavity fre-quency doubling of 1.064μm radiation of a Q-switched Nd:YAG laser for the first time to our knowledge.The energy conversion efficiency of 61% has been obtained.
1991, 15(2): 73-76.
Abstract:
A 3-channel RF CO2 laser array is introduced.By use of the ridge coupled technique,35 watt coherent laser output of this RF CO2 laser array has been obtained with the efficiency approximate to 10%.The far-field intensity profile has also been measured.
A 3-channel RF CO2 laser array is introduced.By use of the ridge coupled technique,35 watt coherent laser output of this RF CO2 laser array has been obtained with the efficiency approximate to 10%.The far-field intensity profile has also been measured.
1991, 15(2): 77-83.
Abstract:
Using matrix optics methods,the following subjects are analysed;1.two forms of transfer matrix for PCM and their physical meaning,2.comparison between PCR and conventional stable resona-tors,3.beam parameters of PCR,4.PCR having frequency shift,5.sta-bility of PCR.Some questions are proposed and discussed.
Using matrix optics methods,the following subjects are analysed;1.two forms of transfer matrix for PCM and their physical meaning,2.comparison between PCR and conventional stable resona-tors,3.beam parameters of PCR,4.PCR having frequency shift,5.sta-bility of PCR.Some questions are proposed and discussed.
1991, 15(2): 84-87.
Abstract:
A new type of CO2 laser device,TE01 mode CO2 wave-guide laser,whose CW output is more than 5W in 400mm total length,has been reported.Based on this an experimental system of hollow cylindrical metallic waveguide has been set up.For φ1.2mm×1150mm Ni waveguide the transnission losses are loss than 2.27dB/m.
A new type of CO2 laser device,TE01 mode CO2 wave-guide laser,whose CW output is more than 5W in 400mm total length,has been reported.Based on this an experimental system of hollow cylindrical metallic waveguide has been set up.For φ1.2mm×1150mm Ni waveguide the transnission losses are loss than 2.27dB/m.
1991, 15(2): 88-92.
Abstract:
Based on Hugens-Fresnel diffraction integral,the trans-formation formula that describes the propagation of anisotropic Gaus-sian-Schell model beams through optical systems has been derived.Further,the relation between their propagation characteristics in the free-space and the parameters of their sources is discussed.
Based on Hugens-Fresnel diffraction integral,the trans-formation formula that describes the propagation of anisotropic Gaus-sian-Schell model beams through optical systems has been derived.Further,the relation between their propagation characteristics in the free-space and the parameters of their sources is discussed.
1991, 15(2): 93-96.
Abstract:
The relationships between focal length,oriented error of focal plane of the mirror and span,optic axis parallelism of the laser products are described.A method for orienting more precise position of focal plane is presented.
The relationships between focal length,oriented error of focal plane of the mirror and span,optic axis parallelism of the laser products are described.A method for orienting more precise position of focal plane is presented.
1991, 15(2): 97-103.
Abstract:
The measurement system for laser beam intensity profile using a microcomputer for data processing and a CCD detector of the two-dimensional array is introduced.The design of the whole system and the software are discussed.The error analysis is presented.A real time and automatic measurement of intensity profile of pulsed and CW laser beam has been realized.
The measurement system for laser beam intensity profile using a microcomputer for data processing and a CCD detector of the two-dimensional array is introduced.The design of the whole system and the software are discussed.The error analysis is presented.A real time and automatic measurement of intensity profile of pulsed and CW laser beam has been realized.
1991, 15(2): 104-108.
Abstract:
In this paper,experimental results of intensity fluctua-tion(scintillation) and dancing(angle-of-arrival fluctuation and isoplanatic angle)of laser beam at Dawanshan Islands are reported.The results are comparied with the data of turbulent intensity measu-red simulteneously.It is indicated that the turbulence in marine atmosphere of the South China Sea during late autumn and early winter is rather violent,and it's effect on laser propagation is remarkable.
In this paper,experimental results of intensity fluctua-tion(scintillation) and dancing(angle-of-arrival fluctuation and isoplanatic angle)of laser beam at Dawanshan Islands are reported.The results are comparied with the data of turbulent intensity measu-red simulteneously.It is indicated that the turbulence in marine atmosphere of the South China Sea during late autumn and early winter is rather violent,and it's effect on laser propagation is remarkable.
1991, 15(2): 108-111.
Abstract:
A new type of continuously adjustable optical attenuator based on the principle of polarization beam splitting is described.The results of both theoretical analyses and experimental measurement show that the device has advantages of large dynamic range,polarization-independent attenuation properties and no change in polarization state and space distribution of the beam.
A new type of continuously adjustable optical attenuator based on the principle of polarization beam splitting is described.The results of both theoretical analyses and experimental measurement show that the device has advantages of large dynamic range,polarization-independent attenuation properties and no change in polarization state and space distribution of the beam.
1991, 15(2): 111-116.
Abstract:
Laser processing ceramic materials is a new application of laser technology.The laser processing technology is used to make some special ceramic materials physically or chemically,and meets some special processing conditions for ceramic materials.Advance and state of the technology are reviewed in research and application of interaction of laser with ceramics.Some problems on the application and methods for overcoming them are discussed.
Laser processing ceramic materials is a new application of laser technology.The laser processing technology is used to make some special ceramic materials physically or chemically,and meets some special processing conditions for ceramic materials.Advance and state of the technology are reviewed in research and application of interaction of laser with ceramics.Some problems on the application and methods for overcoming them are discussed.
1991, 15(2): 117-121.
Abstract:
Based on the Chang-electrode theory and its procedure designing,the concept,design theory and procedure about the non-sym-metry Chang-electrode are described.The process of the Chang-elec-trode with numerically-controlled machinery.
Based on the Chang-electrode theory and its procedure designing,the concept,design theory and procedure about the non-sym-metry Chang-electrode are described.The process of the Chang-elec-trode with numerically-controlled machinery.
1991, 15(2): 122-126.
Abstract:
A simplified laser heating analytical model is analyzed,and the pertinent condition for application of the model is pointed out.
A simplified laser heating analytical model is analyzed,and the pertinent condition for application of the model is pointed out.
1991, 15(2): 126-128.
Abstract:
A new technique for making rainbow hologram to reconstructe large viewing angle and distortionless image by use of holographic optical element is described and the result of experiment is given.
A new technique for making rainbow hologram to reconstructe large viewing angle and distortionless image by use of holographic optical element is described and the result of experiment is given.
