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RSS1991 Vol. 15, No. 4
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1991, 15(4): 193-198.
[Abstract]
[PDF 1581KB]
Abstract:
A pulsed YAG laser is used to ignite detonating powder to produce a explosive field and combustion field.The time series interferograms of the explosive field and initial combustion process are obtained with a time series interferometry which consists of a large aperture and long path interferometer,a series pulsed laser source and a rotating right angle prism type of high speed canning camera. These time series interferograms form the basis of studying the characteristics of the explosive field and combustion field of the detonating powder.
A pulsed YAG laser is used to ignite detonating powder to produce a explosive field and combustion field.The time series interferograms of the explosive field and initial combustion process are obtained with a time series interferometry which consists of a large aperture and long path interferometer,a series pulsed laser source and a rotating right angle prism type of high speed canning camera. These time series interferograms form the basis of studying the characteristics of the explosive field and combustion field of the detonating powder.
1991, 15(4): 199-201.
Abstract:
In this paper,a high power laser reflector with a semi-conduction freezer is discussed.Using the freezer,the distortion and vibration of the reflector produced in conventional water-colding system are not generated.
In this paper,a high power laser reflector with a semi-conduction freezer is discussed.Using the freezer,the distortion and vibration of the reflector produced in conventional water-colding system are not generated.
1991, 15(4): 202-209.
Abstract:
By using the self-consistent method of the complex curvature tensor Q-1,the characteristics of the axially asymmetric resonator bounded by cylindrical-spherical mirrors are analysed and illustrated with an numerical example.Our experiment of the slab solid state laser with an axially asymmetric resonator is reported and discussed.
By using the self-consistent method of the complex curvature tensor Q-1,the characteristics of the axially asymmetric resonator bounded by cylindrical-spherical mirrors are analysed and illustrated with an numerical example.Our experiment of the slab solid state laser with an axially asymmetric resonator is reported and discussed.
1991, 15(4): 210-214.
Abstract:
In this paper,the research content and progress of laser chemistry are introduced.From the view of new knowledge and new technology,the utilization of laser chemistry is commented.
In this paper,the research content and progress of laser chemistry are introduced.From the view of new knowledge and new technology,the utilization of laser chemistry is commented.
1991, 15(4): 215-217.
Abstract:
In view of the confusion in definition and application of laser beam diameter,this paper discusses the problems of difinition and application of laser beam diameter in laser protection.
In view of the confusion in definition and application of laser beam diameter,this paper discusses the problems of difinition and application of laser beam diameter in laser protection.
1991, 15(4): 218-220.
Abstract:
The infraed spectrum character of the PbF2 thin film is presented.The formula used to calculate the optical index of the thin film from the spectrum character is modified and according to the modified formula,the optical index of PbF2 thin film is obtained.It is pointed out that the PbF2 is a good material for infrared coating.
The infraed spectrum character of the PbF2 thin film is presented.The formula used to calculate the optical index of the thin film from the spectrum character is modified and according to the modified formula,the optical index of PbF2 thin film is obtained.It is pointed out that the PbF2 is a good material for infrared coating.
1991, 15(4): 220-224.
Abstract:
The experiment of synthesizing superfine Si3N4 powder by using the CW CO2 laser to irradiate the fast flowing gases (SiH4+NH3) is described.The effect of the laser spectrum variation on the synthesis reaction has been revealed.The deformation phenomenon of the infrared absorption spectrum of the powder has been discovered.
The experiment of synthesizing superfine Si3N4 powder by using the CW CO2 laser to irradiate the fast flowing gases (SiH4+NH3) is described.The effect of the laser spectrum variation on the synthesis reaction has been revealed.The deformation phenomenon of the infrared absorption spectrum of the powder has been discovered.
1991, 15(4): 224-229.
Abstract:
The functional relationship between the diffraction efficiency τi(⊿ω)of a tunable-laser induced transient grating and the lifetime in ith energy level is derived from the theory of three-level rate equations and Maxwell equations.In this paper,the diffraction line shape τi(⊿ω)is analyzed and discussed.The experiment result of the longitudinal relaxation time T1 associated with the S0-S1 electronic transition of Malachite Green solution is also reported.
The functional relationship between the diffraction efficiency τi(⊿ω)of a tunable-laser induced transient grating and the lifetime in ith energy level is derived from the theory of three-level rate equations and Maxwell equations.In this paper,the diffraction line shape τi(⊿ω)is analyzed and discussed.The experiment result of the longitudinal relaxation time T1 associated with the S0-S1 electronic transition of Malachite Green solution is also reported.
1991, 15(4): 229-231.
Abstract:
The laser wavelength resonated on the 605.134nm transition in atomic uranium was determined by means of the phenomena of laser-excited population decrease and emitted minus fluorescence signal on the resonant transitional lower level.By combining the methods in this work with that in Ref.[4],laser wavelengths resonated on the actually existential transitions in all the atoms and ions might be determined accurately and veraciously.
The laser wavelength resonated on the 605.134nm transition in atomic uranium was determined by means of the phenomena of laser-excited population decrease and emitted minus fluorescence signal on the resonant transitional lower level.By combining the methods in this work with that in Ref.[4],laser wavelengths resonated on the actually existential transitions in all the atoms and ions might be determined accurately and veraciously.
1991, 15(4): 232-238.
Abstract:
A phased laser array system associated with many lowerpower lasers can give a high power laser beam.The progress of the theory and experiment technique of the phased laser array is summarized.
A phased laser array system associated with many lowerpower lasers can give a high power laser beam.The progress of the theory and experiment technique of the phased laser array is summarized.
1991, 15(4): 238-244.
Abstract:
The recent developments of solid-state laser materials in the respects of high average power,high efficiency,tunable characteristics and multiple wavelengths are reviewed and discussed.
The recent developments of solid-state laser materials in the respects of high average power,high efficiency,tunable characteristics and multiple wavelengths are reviewed and discussed.
1991, 15(4): 244-247.
Abstract:
To form the clear image in a wider view-field,the focus objective of the laser scanning system is either fθ lens or a parabolic mirror in front of the objective.In this paper,the imaging characters and design methods of the parabolic mirror scanning system are analyzed theoretically.
To form the clear image in a wider view-field,the focus objective of the laser scanning system is either fθ lens or a parabolic mirror in front of the objective.In this paper,the imaging characters and design methods of the parabolic mirror scanning system are analyzed theoretically.
1991, 15(4): 248-254.
Abstract:
The use of the optical phase conjugation process for optical logic computation is described.The optical logic variables can be represented by orthogonal polarization states.The relation among the polarization states of the phase conjugate wave,pump wave and the incident wave is derived from the Maxwell field equation.
The use of the optical phase conjugation process for optical logic computation is described.The optical logic variables can be represented by orthogonal polarization states.The relation among the polarization states of the phase conjugate wave,pump wave and the incident wave is derived from the Maxwell field equation.
1991, 15(4): 255-257.
Abstract:
The characteristics of acumination condyloma in different region,the operating method and treatment of laser medicine are described emphatically.
The characteristics of acumination condyloma in different region,the operating method and treatment of laser medicine are described emphatically.
