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RSS1996 Vol. 20, No. 1
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1996, 20(1): 1-4.
[Abstract]
[PDF 1145KB]
Abstract:
The advantages of employing a variable reflectivity mirror in a stable resonator are evaluated.A radial variable Fabry-Perot interferometer (RAVI) has been applied to a pulsed TEA CO2 laser with a geometrical stable resonator to improve the intensity profile of output laser beam.
The advantages of employing a variable reflectivity mirror in a stable resonator are evaluated.A radial variable Fabry-Perot interferometer (RAVI) has been applied to a pulsed TEA CO2 laser with a geometrical stable resonator to improve the intensity profile of output laser beam.
1996, 20(1): 5-8.
Abstract:
This paper points out that the main reason of failure of home-made helium-cadmium lasers is the deposition of cadmimum vapor in discharge capillary.Here,the phenomenon is analyzed in detail,and the repair techniques are given.
This paper points out that the main reason of failure of home-made helium-cadmium lasers is the deposition of cadmimum vapor in discharge capillary.Here,the phenomenon is analyzed in detail,and the repair techniques are given.
1996, 20(1): 9-13.
Abstract:
This paper analyzes theoretically the mechanism of magnetic switch for excimer laser,in detail,and points out that the main factors of effecting of operating characteristics of multistage LC magnetic switch are the match of saturation inductance and unsaturation inductance of stages,properly selecting of capacitors and section area of magnetic switch.Corresponding to this analySis,the principles ofdesigning of magnetic switch are concluded.A new magnetic switch is developed,which has high output power over 1kW,effectiveness 88.6%,pulse width 80us.
This paper analyzes theoretically the mechanism of magnetic switch for excimer laser,in detail,and points out that the main factors of effecting of operating characteristics of multistage LC magnetic switch are the match of saturation inductance and unsaturation inductance of stages,properly selecting of capacitors and section area of magnetic switch.Corresponding to this analySis,the principles ofdesigning of magnetic switch are concluded.A new magnetic switch is developed,which has high output power over 1kW,effectiveness 88.6%,pulse width 80us.
1996, 20(1): 14-19.
Abstract:
In this paper,by using the stationary-phase method the propagation properties of diffraction-free beams are analyzed in detail and compared with those of Gaussian beams.An axicon is used to produce the zeroth-order Bessel beam and then its propagation properties are studied experimentally.Theresults are consistent with the theoretical prediction.
In this paper,by using the stationary-phase method the propagation properties of diffraction-free beams are analyzed in detail and compared with those of Gaussian beams.An axicon is used to produce the zeroth-order Bessel beam and then its propagation properties are studied experimentally.Theresults are consistent with the theoretical prediction.
1996, 20(1): 20-25.
Abstract:
The crystal structure,spectrum properties and laser performances of a Cr4+-doped YAGare introduced systematically in this Paper.We also expound the limitation in tuning range and lasingproperties by the excited-state absorption,the polarization and the Passive Q-switch behavior by saturation absorption.
The crystal structure,spectrum properties and laser performances of a Cr4+-doped YAGare introduced systematically in this Paper.We also expound the limitation in tuning range and lasingproperties by the excited-state absorption,the polarization and the Passive Q-switch behavior by saturation absorption.
1996, 20(1): 26-29.
Abstract:
The object of the paper is to introduce the new phenomena of gas sensing optical transmission of SnO2:TiO2 two-dimension film of thickness less 1μm,and the phenomenon is much differentfrom the Phenomena of thickness 10pm.When the concentration of the combustible gas is lower,thetransmission spectra of the film move towards short-wave with the increasing of the gas concentration.And in higher gas concentration,the transmissivity increase with increasing of gas concentration.
The object of the paper is to introduce the new phenomena of gas sensing optical transmission of SnO2:TiO2 two-dimension film of thickness less 1μm,and the phenomenon is much differentfrom the Phenomena of thickness 10pm.When the concentration of the combustible gas is lower,thetransmission spectra of the film move towards short-wave with the increasing of the gas concentration.And in higher gas concentration,the transmissivity increase with increasing of gas concentration.
1996, 20(1): 29-31.
Abstract:
A complex achromatic λ/4 waveplate,which is composed of a λ/4 waveplate and a λ/2 waveplate,has been developed.The fast axes of the waveplates make an angle of 60 degree with eachother.The experiment shows that the complex λ/4 waveplate is chromatic at the range of 0.48-0.76λm.
A complex achromatic λ/4 waveplate,which is composed of a λ/4 waveplate and a λ/2 waveplate,has been developed.The fast axes of the waveplates make an angle of 60 degree with eachother.The experiment shows that the complex λ/4 waveplate is chromatic at the range of 0.48-0.76λm.
1996, 20(1): 32-34.
Abstract:
In this paper,the annealing procedure of proton-exchange LiNbO3 waveguide isanalyzed.Experimentally,elctron-opticcal index of LiNbO3,relationship of thickness of waveguide andannealing time are studied.
In this paper,the annealing procedure of proton-exchange LiNbO3 waveguide isanalyzed.Experimentally,elctron-opticcal index of LiNbO3,relationship of thickness of waveguide andannealing time are studied.
1996, 20(1): 34-36.
Abstract:
The subject of this paper is to emphasize the results of experimental study of relationship of the Position of rod and modulator with output power,mode volume and power stability of mode-locked Nd:YAG laser.The optimal position of laser rod is given.
The subject of this paper is to emphasize the results of experimental study of relationship of the Position of rod and modulator with output power,mode volume and power stability of mode-locked Nd:YAG laser.The optimal position of laser rod is given.
1996, 20(1): 37-40.
Abstract:
The requirement of adaptive optical system to artificial guide star is discussed and two kinds of laser guide star have been introduced briefly.In this paper,the mechanism of sodium laser guide star and laser systems used in this guide star are emphasized.
The requirement of adaptive optical system to artificial guide star is discussed and two kinds of laser guide star have been introduced briefly.In this paper,the mechanism of sodium laser guide star and laser systems used in this guide star are emphasized.
1996, 20(1): 41-43.
Abstract:
A optical system,used as an optical Pen in a large size marker,is employed to fucus the Nd:YAG laser beam transmitted with the optical fiber.The focused beam diameter can be less than 0.2mm or 0.1mm and can be controlled by hand.The optical Pen may mark the workpiece or weldingelectronic elements.
A optical system,used as an optical Pen in a large size marker,is employed to fucus the Nd:YAG laser beam transmitted with the optical fiber.The focused beam diameter can be less than 0.2mm or 0.1mm and can be controlled by hand.The optical Pen may mark the workpiece or weldingelectronic elements.
1996, 20(1): 44-46.
Abstract:
In this Paper,the gAs excise rate β and the operation stablity of TEA CO2 laser are analyzed,when a automatic gas exchange system is used.The mathematical equation of βis derived.The examment results shag that the caledatiou and measusement are well coincident.
In this Paper,the gAs excise rate β and the operation stablity of TEA CO2 laser are analyzed,when a automatic gas exchange system is used.The mathematical equation of βis derived.The examment results shag that the caledatiou and measusement are well coincident.
1996, 20(1): 46-49.
Abstract:
This paper emphasized the transference features of beam waist D0 and far field divergence θ,defined by factor M2,while a light beam goes through a lens system A generalized parameter R(z) and q(z) are defined with the propagation factor M2 and plofile diameter of the light beam.Thefact is proved,that the parameter R(z) and q(z) obey the generalized ABCD rule.
This paper emphasized the transference features of beam waist D0 and far field divergence θ,defined by factor M2,while a light beam goes through a lens system A generalized parameter R(z) and q(z) are defined with the propagation factor M2 and plofile diameter of the light beam.Thefact is proved,that the parameter R(z) and q(z) obey the generalized ABCD rule.
1996, 20(1): 50-52.
Abstract:
Gas life is an important factor for operation of excimer laser.The gas lifetime of the XeCl excimer laser is mainly dependent on the ingredient of halogen gas and the actinic absorption.In experimental study,HCI gas was added when laser output reduced to 70%.Filially,the relationship of laser output and HCI additive was obtained.The experimental results show that the gas lifetime can be prolonged with the HCI gas additivc.
Gas life is an important factor for operation of excimer laser.The gas lifetime of the XeCl excimer laser is mainly dependent on the ingredient of halogen gas and the actinic absorption.In experimental study,HCI gas was added when laser output reduced to 70%.Filially,the relationship of laser output and HCI additive was obtained.The experimental results show that the gas lifetime can be prolonged with the HCI gas additivc.
1996, 20(1): 53-57.
Abstract:
considering study of the energy loss,energy spread and their corresponding significance of a free-electron laser with magnetostatic field independent of z axis,the relationship of energy spread and spontaneous emission is derived.The results show that tile spontaneous emission is proportional to electron energy spread,and the optical power gain is proportional to average electron enelgy loss.
considering study of the energy loss,energy spread and their corresponding significance of a free-electron laser with magnetostatic field independent of z axis,the relationship of energy spread and spontaneous emission is derived.The results show that tile spontaneous emission is proportional to electron energy spread,and the optical power gain is proportional to average electron enelgy loss.
1996, 20(1): 58-61.
Abstract:
This paper introduces a microcomputer claied-loop controller used to control the exciting current of laser power source.The controller is a one chip computer,moded 8031,which is used as a controller and a trigger.The current sampler is a current Hall sensor to provide the exciting current signal.The system is simple and reliable,can widely used in CW Nd:YAG lasers.
This paper introduces a microcomputer claied-loop controller used to control the exciting current of laser power source.The controller is a one chip computer,moded 8031,which is used as a controller and a trigger.The current sampler is a current Hall sensor to provide the exciting current signal.The system is simple and reliable,can widely used in CW Nd:YAG lasers.
1996, 20(1): 61-64.
Abstract:
The design procedure of copper vapor laser is emphasize,in this paper.on the basis of large amount of expelment data,the selection principles of discharge tube size and input discharge perwer unit volume are presented.According to the gas temperature distribution in dischage tube and coaxi heat conductivity laal.The thicknes of alumina fiber can be determined.The phenomena called"black center of beam" is analyzed and the solvable metals is suggested.The design idea is verified verywell with a SW copper vapor laser developed by us recently.
The design procedure of copper vapor laser is emphasize,in this paper.on the basis of large amount of expelment data,the selection principles of discharge tube size and input discharge perwer unit volume are presented.According to the gas temperature distribution in dischage tube and coaxi heat conductivity laal.The thicknes of alumina fiber can be determined.The phenomena called"black center of beam" is analyzed and the solvable metals is suggested.The design idea is verified verywell with a SW copper vapor laser developed by us recently.
