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RSS1991 Vol. 15, No. 6
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1991, 15(6): 321-326.
[Abstract]
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Abstract:
A systematic experiment on the dual-frequency tuning characteristic of the dye mixture of Rh6G and CV in ethyl alcohol has been made,and by using the theory of energy transfer in the dye mixture and the principle of dual-frequency correlated tuning in single dye,the tuning characteristeic is discussed and analyzed.
A systematic experiment on the dual-frequency tuning characteristic of the dye mixture of Rh6G and CV in ethyl alcohol has been made,and by using the theory of energy transfer in the dye mixture and the principle of dual-frequency correlated tuning in single dye,the tuning characteristeic is discussed and analyzed.
1991, 15(6): 326-330.
Abstract:
A positive-branch unstable resonator with a step reflectivity mirror used in high power CO2 laser is presented.This resonator is investigated both theoretically and experimentally.The output power of this resonator is 700 watts.W.ith on efficiency of 7.9 percent.The divergent angle of far-field is 2.1 mrad.
A positive-branch unstable resonator with a step reflectivity mirror used in high power CO2 laser is presented.This resonator is investigated both theoretically and experimentally.The output power of this resonator is 700 watts.W.ith on efficiency of 7.9 percent.The divergent angle of far-field is 2.1 mrad.
1991, 15(6): 331-334.
Abstract:
The propagation of high-power CW CO2 laser beam in near-ground atmosphere is described in this paper.The laser power is from 3 to 5 kilowatts and the measured propagation distance is from 77 to 107 meters.The laser beam patterns influenced by atmosphere and the distortion patterns of the beam itself has been obtained.
The propagation of high-power CW CO2 laser beam in near-ground atmosphere is described in this paper.The laser power is from 3 to 5 kilowatts and the measured propagation distance is from 77 to 107 meters.The laser beam patterns influenced by atmosphere and the distortion patterns of the beam itself has been obtained.
1991, 15(6): 335-340.
Abstract:
In this paper,the operating principle and characteristic of Moire deflectometry are analysed strictly on the basis of physical optics meshod,some new and strict conclusions about Moire deflectometry are obtained.The conclusions are confirmed by experimental results.
In this paper,the operating principle and characteristic of Moire deflectometry are analysed strictly on the basis of physical optics meshod,some new and strict conclusions about Moire deflectometry are obtained.The conclusions are confirmed by experimental results.
1991, 15(6): 341-344.
Abstract:
The microstructure of 4Cr5MoV1Si steel treated by means of CO2 laser rapid melting was studied.The results show that the melted region is fine extensional growing cellular crystals and cellular dendrite crystals.In the melted region,the distribution of alloying elements is homogeneous,all carbides are melted and inclusions are eliminated.The microstructure of the melted region is martensite and the amount of lath martensite is more than that of the steel usually quenched.
The microstructure of 4Cr5MoV1Si steel treated by means of CO2 laser rapid melting was studied.The results show that the melted region is fine extensional growing cellular crystals and cellular dendrite crystals.In the melted region,the distribution of alloying elements is homogeneous,all carbides are melted and inclusions are eliminated.The microstructure of the melted region is martensite and the amount of lath martensite is more than that of the steel usually quenched.
1991, 15(6): 344-348.
Abstract:
this paper presents a new method of real-time monitoring the thickness of ZnO film in isoaxis magnetron sputtering device with laser.TCJ-300 type isoaxis magnetron sputter machine is made in our institute.The experimental results show that this method has more adwantages than other methods of monitoring film thickness have.It can show the homogeneity and the thickness of the film as well as the sputtering velocity in process of sputtering.The experimental set and its operation are simple.The monitoring accuracy of the thick of film is better than 1.5%.
this paper presents a new method of real-time monitoring the thickness of ZnO film in isoaxis magnetron sputtering device with laser.TCJ-300 type isoaxis magnetron sputter machine is made in our institute.The experimental results show that this method has more adwantages than other methods of monitoring film thickness have.It can show the homogeneity and the thickness of the film as well as the sputtering velocity in process of sputtering.The experimental set and its operation are simple.The monitoring accuracy of the thick of film is better than 1.5%.
1991, 15(6): 349-353.
Abstract:
By selecting the aqueous solution of Rh6G with polyglycol additives,the parameters,such as laser output,laser threshold and harmonious spectra are studied experimentally.Through these experiments,we have studied the properties of the enhancement of Rh6G laser with polyglycol.We also qualitively discuss effect on fluorescence and laser of dye molecule of the viscosity of solution.
By selecting the aqueous solution of Rh6G with polyglycol additives,the parameters,such as laser output,laser threshold and harmonious spectra are studied experimentally.Through these experiments,we have studied the properties of the enhancement of Rh6G laser with polyglycol.We also qualitively discuss effect on fluorescence and laser of dye molecule of the viscosity of solution.
1991, 15(6): 353-358.
Abstract:
The bium metaborete crystal in low temperature phase is a new nonlinear optical material.In this paper,the measuring results of crystal defects by means of the positron annihilation lifeti me spectroscopy are reported,the kind of defects and the formation mechanism are analysed and the study provides scientific basis for over-coming defects and growing high quality crystals.
The bium metaborete crystal in low temperature phase is a new nonlinear optical material.In this paper,the measuring results of crystal defects by means of the positron annihilation lifeti me spectroscopy are reported,the kind of defects and the formation mechanism are analysed and the study provides scientific basis for over-coming defects and growing high quality crystals.
1991, 15(6): 359-364.
Abstract:
The paper gives a approach of modulating backscatter wave,in order to reduce lock-in regien in ring laser gyroscope and analyses modulated amplitude,modulating frequency and the effect on frequency stability.
The paper gives a approach of modulating backscatter wave,in order to reduce lock-in regien in ring laser gyroscope and analyses modulated amplitude,modulating frequency and the effect on frequency stability.
1991, 15(6): 364-367.
Abstract:
Three new techniques in holographic experiments are introduced.With them,some problems bothering holographic workers can be smoothly overcome.They must be very helpful to researchers in holography.
Three new techniques in holographic experiments are introduced.With them,some problems bothering holographic workers can be smoothly overcome.They must be very helpful to researchers in holography.
1991, 15(6): 367-370.
Abstract:
A ruggedized design method for shaping diode laser beams,which can totally eliminate the effects caused by the temperature change or laser wavelength shift on output beam direction,is described.
A ruggedized design method for shaping diode laser beams,which can totally eliminate the effects caused by the temperature change or laser wavelength shift on output beam direction,is described.
1991, 15(6): 370-374.
Abstract:
A computer controlled system for measuring diode laser characteristics is built up.In this paper,the system design,component function,software design,etc.are emphasized.A series experimental results are given.The results showy that the computer testing technique is much better than previcus testing technique and very useful for diode laser manufacture and application.
A computer controlled system for measuring diode laser characteristics is built up.In this paper,the system design,component function,software design,etc.are emphasized.A series experimental results are given.The results showy that the computer testing technique is much better than previcus testing technique and very useful for diode laser manufacture and application.
1991, 15(6): 371-381.
Abstract:
The design of thermostat for a crystal device of frequency doubling and the basic circuits of temperature controll are described briefly,and the experimental results are given,too,in this paper.
The design of thermostat for a crystal device of frequency doubling and the basic circuits of temperature controll are described briefly,and the experimental results are given,too,in this paper.
1991, 15(6): 375-378.
Abstract:
CW CO2 and XeCl excimer laser surface-modification of rabit hair is studied,respectively.Experiments show that both of the lasers directly radiating rabit hair in air can change their fiber surface,XeCl excimer is more suitable for laser surface-modification of rabit hair.
CW CO2 and XeCl excimer laser surface-modification of rabit hair is studied,respectively.Experiments show that both of the lasers directly radiating rabit hair in air can change their fiber surface,XeCl excimer is more suitable for laser surface-modification of rabit hair.
1991, 15(6): 382-384.
Abstract:
The damages of the dielectric mirrors from 2.94μm laser beams in YAG:Er3+ crystal wave investigated.The test results of different basis plate and coatings materials show that the damage is causesed by the large absorption of“OH”at 2.94μm wavelength (α=8000cm-1).So,it is important to select statable materials and coat waterproof protection film.
The damages of the dielectric mirrors from 2.94μm laser beams in YAG:Er3+ crystal wave investigated.The test results of different basis plate and coatings materials show that the damage is causesed by the large absorption of“OH”at 2.94μm wavelength (α=8000cm-1).So,it is important to select statable materials and coat waterproof protection film.
