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RSS1991 Vol. 15, No. 1
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1991, 15(1): 1-4.
[Abstract]
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Abstract:
Operating characteristics of UV Cu+ ion lasers with helical hollow cathodes have been investigated. The UV outputs of the lasers with different helical structures have been measured. A maximum peak power of 660mW at 260.0nm was obtained with a helical hollow cathode of 1.2m length, 6mm inner diameter and 9mm coil pitch.
Operating characteristics of UV Cu+ ion lasers with helical hollow cathodes have been investigated. The UV outputs of the lasers with different helical structures have been measured. A maximum peak power of 660mW at 260.0nm was obtained with a helical hollow cathode of 1.2m length, 6mm inner diameter and 9mm coil pitch.
1991, 15(1): 5-8.
Abstract:
The gain spectra of the diode laser with antireflective coatings on its facets has been measured under the condition of biassing higher than its threshold. The experimental results agree with the theoretical predictions.
The gain spectra of the diode laser with antireflective coatings on its facets has been measured under the condition of biassing higher than its threshold. The experimental results agree with the theoretical predictions.
1991, 15(1): 9-13.
Abstract:
A acousto-optic Q-switched continuous DC discharged waveguide CO2 laser has been developed for the first time by using a germanium single crystal as acousto-optic medium. The pulse repetition frequency of the Q-switched laser can be freely adjuted from 0 to 200 kHz. The performance of the laser is described.
A acousto-optic Q-switched continuous DC discharged waveguide CO2 laser has been developed for the first time by using a germanium single crystal as acousto-optic medium. The pulse repetition frequency of the Q-switched laser can be freely adjuted from 0 to 200 kHz. The performance of the laser is described.
1991, 15(1): 14-17.
Abstract:
A new multi-beam combining and shaping technique is proposed for laser diodes(LDs) with the advantages of simplicity and almost no-limited beam's number. With considering the optically feedback noise of LD,the polarization isolating unit batween feedback lights and LDs has been analysed so as to gat the technical requireinents during designing, manufacturing and adjusting.
A new multi-beam combining and shaping technique is proposed for laser diodes(LDs) with the advantages of simplicity and almost no-limited beam's number. With considering the optically feedback noise of LD,the polarization isolating unit batween feedback lights and LDs has been analysed so as to gat the technical requireinents during designing, manufacturing and adjusting.
1991, 15(1): 17-21.
Abstract:
The half-shade Polarization prism is an important device for determining and measuring accurately the azimuth of a beam of Plane Polarized light. In this paper, the theoretic analysis of the device was given systematically. Experimental test of the half-shade Polarization prism was made. The results show that the setting precision agrees well with the theoretic design.
The half-shade Polarization prism is an important device for determining and measuring accurately the azimuth of a beam of Plane Polarized light. In this paper, the theoretic analysis of the device was given systematically. Experimental test of the half-shade Polarization prism was made. The results show that the setting precision agrees well with the theoretic design.
1991, 15(1): 21-24.
Abstract:
The experimental Procedure for the TiN laser alloying in the carbonic steel surface by using a CO2 laser is described. A comprehensive analysis of the phase structure, the phase morphology, the distribution profile of the alloying elements, the hardness, and the resistance to abrasion of the alloyed layer after laser treatment is introduced. The results indicate that TiN laser surface alloying will give many strengthening effects on the carbonic steel surface. The characteristic of the base metal surface can be greatly ameliorated.
The experimental Procedure for the TiN laser alloying in the carbonic steel surface by using a CO2 laser is described. A comprehensive analysis of the phase structure, the phase morphology, the distribution profile of the alloying elements, the hardness, and the resistance to abrasion of the alloyed layer after laser treatment is introduced. The results indicate that TiN laser surface alloying will give many strengthening effects on the carbonic steel surface. The characteristic of the base metal surface can be greatly ameliorated.
1991, 15(1): 25-32.
Abstract:
In order to obtain the numerical value solution of a dye Q-switch laser rate equation. It is necessary to divide the Q-spoiling process into four stages and solve them with the aid of computer respectively.These four stages are:1.initial process, 2.prelasering process, 3.dye bleaching process, 4.giant pulse process. The solutions which we obtained coinside with the exparimantal results very well.This method is similar to simulate experiment and it can be used for laser engineering design.
In order to obtain the numerical value solution of a dye Q-switch laser rate equation. It is necessary to divide the Q-spoiling process into four stages and solve them with the aid of computer respectively.These four stages are:1.initial process, 2.prelasering process, 3.dye bleaching process, 4.giant pulse process. The solutions which we obtained coinside with the exparimantal results very well.This method is similar to simulate experiment and it can be used for laser engineering design.
1991, 15(1): 33-35.
Abstract:
From the plane semi-limitless one-dimensional active heat diffusion equation and biochemical reaction rate equation, the maximum dosage of defocusing CO2 laser irradiation for skin tissue are derived. The relationships between the laser dosage, temperature increasing and biochemical reaction rate are analyzed. Finally,the mechanism of CO2 laser temperature effects on open-wound skin tissue is discussed.
From the plane semi-limitless one-dimensional active heat diffusion equation and biochemical reaction rate equation, the maximum dosage of defocusing CO2 laser irradiation for skin tissue are derived. The relationships between the laser dosage, temperature increasing and biochemical reaction rate are analyzed. Finally,the mechanism of CO2 laser temperature effects on open-wound skin tissue is discussed.
1991, 15(1): 36-38.
Abstract:
In this paper, the coherence between incident light waves in four wave mixings (FWMs) in photorefractive crystals are discussed. Its effects on FWM experimental characteristics are analyzed. The experimental results are given,which prove the correctness of theoretical analyses.
In this paper, the coherence between incident light waves in four wave mixings (FWMs) in photorefractive crystals are discussed. Its effects on FWM experimental characteristics are analyzed. The experimental results are given,which prove the correctness of theoretical analyses.
1991, 15(1): 39-43.
Abstract:
The present studies of laser photosensitive ablation of atherosclerosis plaque, the mechanism of photosensitizer selective accumulating within atheroma and the mechanism of laser photosensitive ablation, and its application perspective are reviewed.
The present studies of laser photosensitive ablation of atherosclerosis plaque, the mechanism of photosensitizer selective accumulating within atheroma and the mechanism of laser photosensitive ablation, and its application perspective are reviewed.
1991, 15(1): 44-46.
Abstract:
In this paper recent developments of laser angioplasty in America are discussed.
In this paper recent developments of laser angioplasty in America are discussed.
1991, 15(1): 47-48.
Abstract:
The alignment method presented is suitable for the stable resonator which has a mirror with a big coupling hole. It is characterized by rapid and easy alignment without any additional light sources and aligning instruments. The alignment accuracy is above 1×10-5rad.
The alignment method presented is suitable for the stable resonator which has a mirror with a big coupling hole. It is characterized by rapid and easy alignment without any additional light sources and aligning instruments. The alignment accuracy is above 1×10-5rad.
1991, 15(1): 49-51.
Abstract:
In this paper, change of phase retardation of light is discussed, when it passes through a wave plate with tiny incident angle. The result is proved by the experiment.
In this paper, change of phase retardation of light is discussed, when it passes through a wave plate with tiny incident angle. The result is proved by the experiment.
1991, 15(1): 52-55.
Abstract:
Problems of the basic working principle, design and error signal handling for a method of the critical angle are analysed emphatically.
Problems of the basic working principle, design and error signal handling for a method of the critical angle are analysed emphatically.
1991, 15(1): 56-58.
Abstract:
A method for increasing gain and decreasing loss of slab laser medium by optimal selection of its geometry parameters is presented. The effects of processing errors on optical energy loss rate are discussed in detail. The experimental results of pulsed Nd:YAG slab laser built recently are also reported.
A method for increasing gain and decreasing loss of slab laser medium by optimal selection of its geometry parameters is presented. The effects of processing errors on optical energy loss rate are discussed in detail. The experimental results of pulsed Nd:YAG slab laser built recently are also reported.
1991, 15(1): 59-62.
Abstract:
The experimental method and the results of high voltage measurement are described. In the experiment, the liquid-core optical fiber is filled with nitrobenzene.
The experimental method and the results of high voltage measurement are described. In the experiment, the liquid-core optical fiber is filled with nitrobenzene.
