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RSS1993 Vol. 17, No. 4
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1993, 17(4): 195-197.
[Abstract]
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Abstract:
In this paper,the refraction indices of Ti:Mg:LiNbO3 crystal has been experimentally studied and the Sellmeir equations have been given out.By using the crystal and an audio-optical modulator,the frequency doubling from 1.064μm to 0.532μm at room temperature is well developed,the conversion efficiency is more than 50％.
In this paper,the refraction indices of Ti:Mg:LiNbO3 crystal has been experimentally studied and the Sellmeir equations have been given out.By using the crystal and an audio-optical modulator,the frequency doubling from 1.064μm to 0.532μm at room temperature is well developed,the conversion efficiency is more than 50％.
1993, 17(4): 198-200.
Abstract:
In this paper,a dispersion-compensated femtosecond laser system synchronously pumped by a CW mode-locked intraeative-doubled Nd:YAG laser is introduced.The pulses of 38fs duration are stably generated at repetition rate of 200 MHz with average output power of 20mW.The construction of the pumping source also diseussed
In this paper,a dispersion-compensated femtosecond laser system synchronously pumped by a CW mode-locked intraeative-doubled Nd:YAG laser is introduced.The pulses of 38fs duration are stably generated at repetition rate of 200 MHz with average output power of 20mW.The construction of the pumping source also diseussed
1993, 17(4): 201-204.
Abstract:
The purpose of the paper is to introduce a new technique of improving the laser alignment accuracy which is built on the basis that the laser beam drift can he described by trigonometrical functions under the certain conditions.The drift volume f(ι):of cach related point in a effective work area can be calculated.Finding the function f(ι):of each measured point in the length l,we can compensated the error of the measured point with the computer technique.So the measure and alignment accuracy can he improved.This technique is more flexible and convenient.
The purpose of the paper is to introduce a new technique of improving the laser alignment accuracy which is built on the basis that the laser beam drift can he described by trigonometrical functions under the certain conditions.The drift volume f(ι):of cach related point in a effective work area can be calculated.Finding the function f(ι):of each measured point in the length l,we can compensated the error of the measured point with the computer technique.So the measure and alignment accuracy can he improved.This technique is more flexible and convenient.
1993, 17(4): 205-208.
Abstract:
A pumped phase conjugator is introduced,in this paper.By using the KNSBN:Ce crystal as both memory material and phase conjugative mirror,an optical associative memory is built.The primary experimental results are given out.
A pumped phase conjugator is introduced,in this paper.By using the KNSBN:Ce crystal as both memory material and phase conjugative mirror,an optical associative memory is built.The primary experimental results are given out.
1993, 17(4): 209-214.
Abstract:
The purpose of this paper is to intduce a dividing region computation model for designing reachthrough avalanche photodiode(RAPD).The eomputed results of the junction parameters and muhiplieationcharacteristics of avalanche region of RAPD are presented.
The purpose of this paper is to intduce a dividing region computation model for designing reachthrough avalanche photodiode(RAPD).The eomputed results of the junction parameters and muhiplieationcharacteristics of avalanche region of RAPD are presented.
1993, 17(4): 215-219.
Abstract:
The atmospheric scintillation,atmospheric dispersion and anisoplanatism set a limit to the application of adaptive optical technique in atmosphere.In this paper,this limit is summarized,and the methods to reduce these effects are introduced.
The atmospheric scintillation,atmospheric dispersion and anisoplanatism set a limit to the application of adaptive optical technique in atmosphere.In this paper,this limit is summarized,and the methods to reduce these effects are introduced.
1993, 17(4): 220-224.
Abstract:
Laser cladding of Ni based-WC alloy coatings on steel 45 has been performed with a 2kW CO2 laser.The experimental results show that the laser cladded layer of the specimen possesses higher hardness,wear and corrosion resistance.The effects of WC content variation in alloys on wear resistance of laser clsdded layer are also discussed in this paper.
Laser cladding of Ni based-WC alloy coatings on steel 45 has been performed with a 2kW CO2 laser.The experimental results show that the laser cladded layer of the specimen possesses higher hardness,wear and corrosion resistance.The effects of WC content variation in alloys on wear resistance of laser clsdded layer are also discussed in this paper.
1993, 17(4): 224-225.
Abstract:
In this paper we report the Raman shifting experimental results of.06μm unstable-reaonator laser with a high pressure CH4 gas.The main work is a comparison of beam quality between the Raman laser and the 1.06μm pump laser.
In this paper we report the Raman shifting experimental results of.06μm unstable-reaonator laser with a high pressure CH4 gas.The main work is a comparison of beam quality between the Raman laser and the 1.06μm pump laser.
1993, 17(4): 226-231.
Abstract:
Based on Taguchi method,an optimizing design of small-sized YAG laser is made.According to orthogonal layerout,the tests are arranged,and using signal-noiee-ratio(SNR)as the stability index of output characteristics of the laser,the optimum parameters combination of the laser is found out.This method greatly improves the dynamic efficiency of the laser.
Based on Taguchi method,an optimizing design of small-sized YAG laser is made.According to orthogonal layerout,the tests are arranged,and using signal-noiee-ratio(SNR)as the stability index of output characteristics of the laser,the optimum parameters combination of the laser is found out.This method greatly improves the dynamic efficiency of the laser.
1993, 17(4): 232-238.
Abstract:
We begin with a promise of the U-boat to land ultra short wave communication and land to U-boat myriametric wave communication,indicate the future tendency of laser communication and the characteristics of laser propagation,laser device and receiver optical filters.
We begin with a promise of the U-boat to land ultra short wave communication and land to U-boat myriametric wave communication,indicate the future tendency of laser communication and the characteristics of laser propagation,laser device and receiver optical filters.
1993, 17(4): 239-243.
Abstract:
This paper describes the theory of 2-D optical measurement in detail,points out the approximate relation between surface undulation and image of light spot,derives the accurate relation of all the components of triangulation device,and gives out the relation between the measuring range and the image of the light spot.At last,the possibility snd the method to adjust the measurement device is illustrated,according to the designed example.
This paper describes the theory of 2-D optical measurement in detail,points out the approximate relation between surface undulation and image of light spot,derives the accurate relation of all the components of triangulation device,and gives out the relation between the measuring range and the image of the light spot.At last,the possibility snd the method to adjust the measurement device is illustrated,according to the designed example.
1993, 17(4): 244-247.
Abstract:
The purpose of the article is to introduce the progress of titannium alloy laser cutting,non-metal laser cutting and the applications of laser cutting in automobile industry.The non-residue cutting and laser clean-cutting are described too.
The purpose of the article is to introduce the progress of titannium alloy laser cutting,non-metal laser cutting and the applications of laser cutting in automobile industry.The non-residue cutting and laser clean-cutting are described too.
1993, 17(4): 248-249.
Abstract:
A practical temperature controlling for system nou-critical phase matching LiNbO3 frequency doublers in,reported.The characteristics are low costaand high temperature stability,when the system was used in the Nd_1 YAG double frequency laser,it continuously operated stably work.The random pulse energy indicates the fluctuation of output energy is less than 3%.
A practical temperature controlling for system nou-critical phase matching LiNbO3 frequency doublers in,reported.The characteristics are low costaand high temperature stability,when the system was used in the Nd_1 YAG double frequency laser,it continuously operated stably work.The random pulse energy indicates the fluctuation of output energy is less than 3%.
1993, 17(4): 250-251.
Abstract:
A Comparison of the effect of CO2 laser operation and routine operation method has heen made.The laser treatment results are greatly satisfied.The procedure has these advantages,such as easy to use,less trauma,safety and less post-operation reaction.
A Comparison of the effect of CO2 laser operation and routine operation method has heen made.The laser treatment results are greatly satisfied.The procedure has these advantages,such as easy to use,less trauma,safety and less post-operation reaction.
