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RSS1992 Vol. 16, No. 4
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1992, 16(4): 193-196.
[Abstract]
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Abstract:
In this paper,the circular polarizing mirrors for high power lasers have been theoretically and experimentally studied,the circular polarizing mirror coated with multiple-film,which could induce 90° phase retardation is prepared experimentally.
In this paper,the circular polarizing mirrors for high power lasers have been theoretically and experimentally studied,the circular polarizing mirror coated with multiple-film,which could induce 90° phase retardation is prepared experimentally.
1992, 16(4): 197-201.
Abstract:
In this paper,the properties,refractive indices,phase-matching angle and frequency doubling at room-temperature of heavily MgO-doped LiNbO3 have been reported.
In this paper,the properties,refractive indices,phase-matching angle and frequency doubling at room-temperature of heavily MgO-doped LiNbO3 have been reported.
1992, 16(4): 202-205.
Abstract:
The working principle and main circuits of laser dynamic detector are introduced in this paper.While a tested workpiece passes the laser-beam of the detector,the detector will automatically display the climensions of the workpiece with the signal process circuit.The detector is a high accuracy,rapid speed and non-contact measuring instrument.
The working principle and main circuits of laser dynamic detector are introduced in this paper.While a tested workpiece passes the laser-beam of the detector,the detector will automatically display the climensions of the workpiece with the signal process circuit.The detector is a high accuracy,rapid speed and non-contact measuring instrument.
1992, 16(4): 206-209.
Abstract:
With the aid of multi-step trials,the active monitoring method adopted to control the deposition of the AR coatings on the facets of the semiconductor lasers has been optimized.As a result,a travelling-wave semiconductor amplifier with an average facet reflectivity of less than 3×10-4 has been obtained,and 20dB signal gain at 1.3μm has been observed.
With the aid of multi-step trials,the active monitoring method adopted to control the deposition of the AR coatings on the facets of the semiconductor lasers has been optimized.As a result,a travelling-wave semiconductor amplifier with an average facet reflectivity of less than 3×10-4 has been obtained,and 20dB signal gain at 1.3μm has been observed.
1992, 16(4): 210-214.
Abstract:
The relationship between operating state and cavity cons-truct parameters of waveguide CO2 laser is investigated.Compared with parameter λ/a,Fresnel number N is direct and quantitative in deciding the operating state of CO2 waveguide laser.And researches also show that CO2 laser with N≤1 is a typcal waveguide laser.The research results have distinct meanings in designing CO2 waveguide laser.
The relationship between operating state and cavity cons-truct parameters of waveguide CO2 laser is investigated.Compared with parameter λ/a,Fresnel number N is direct and quantitative in deciding the operating state of CO2 waveguide laser.And researches also show that CO2 laser with N≤1 is a typcal waveguide laser.The research results have distinct meanings in designing CO2 waveguide laser.
1992, 16(4): 215-217.
Abstract:
In this paper,an application of black-and-white(ASA5) combined with a specialized developer instead of holo film as a new recording medium for dynamic speckle is reported.With this recording medium,double pulse dynamic laser specklc patterns for real bodies are obtained.
In this paper,an application of black-and-white(ASA5) combined with a specialized developer instead of holo film as a new recording medium for dynamic speckle is reported.With this recording medium,double pulse dynamic laser specklc patterns for real bodies are obtained.
1992, 16(4): 218-224.
Abstract:
In this paper,a simple and clear index expression of planar microlenses is obtained through actually measuring the index distribution and mathematically simulating.The index function is the sum of decomposed functions of radial distance and axial distance.By using the basical optical equation,the ray trace is calculated and these equations describing the imaging property of planar microlenses are derived.In this paper,the numerical aperture and the effect of the swelled structure are also discussed.
In this paper,a simple and clear index expression of planar microlenses is obtained through actually measuring the index distribution and mathematically simulating.The index function is the sum of decomposed functions of radial distance and axial distance.By using the basical optical equation,the ray trace is calculated and these equations describing the imaging property of planar microlenses are derived.In this paper,the numerical aperture and the effect of the swelled structure are also discussed.
1992, 16(4): 225-228.
Abstract:
We present an accurate route,which is suitable for the design of nonlinear optical frequency translator of biaxial crystals, to calculate the effective second-order nonlinear coefficients.
We present an accurate route,which is suitable for the design of nonlinear optical frequency translator of biaxial crystals, to calculate the effective second-order nonlinear coefficients.
1992, 16(4): 229-234.
Abstract:
The technology of airborne laser bathymetry has been developing rapidly since it first appeared in America and Australia in the middle of 1960's.Compared with the traditional technology of sonar detection,it is characteristic of hoghly tactical flexibility,rapid survey rate and particularly useful for coastal waters.There are also a lot of civilian application in many areas.
The technology of airborne laser bathymetry has been developing rapidly since it first appeared in America and Australia in the middle of 1960's.Compared with the traditional technology of sonar detection,it is characteristic of hoghly tactical flexibility,rapid survey rate and particularly useful for coastal waters.There are also a lot of civilian application in many areas.
1992, 16(4): 234-238.
Abstract:
In this paper,a theoretical analysis of the farfield inten-sity distribution of SHB waveguide array lasers is presented and the effects of a tilted mirror on pairwise farfield distribution are also di-scussed.
In this paper,a theoretical analysis of the farfield inten-sity distribution of SHB waveguide array lasers is presented and the effects of a tilted mirror on pairwise farfield distribution are also di-scussed.
1992, 16(4): 238-241.
Abstract:
The article presents our experimental procedure of N-B alloying in the 45 steel surface by a CO2 laser beam.The phase structure,the distribution of the elements,the microstructure,the hardness and the resistance to abrasion of the alloy layer are examined and analyzed.The results indicate that the alloy layer will provide many strengthening effects.
The article presents our experimental procedure of N-B alloying in the 45 steel surface by a CO2 laser beam.The phase structure,the distribution of the elements,the microstructure,the hardness and the resistance to abrasion of the alloy layer are examined and analyzed.The results indicate that the alloy layer will provide many strengthening effects.
1992, 16(4): 242-248.
Abstract:
Using the transfer matrix,we have studied the transmission characteristics of Gaussian beam propagating through a reversal parabolic GRIN rod,such as beam spot radius,the relation between the curvature radius of wavefront and the matrix elements.Bases on the stady,we also consider the reversal parabolic GRIN rod can be used as a laser collimation element.
Using the transfer matrix,we have studied the transmission characteristics of Gaussian beam propagating through a reversal parabolic GRIN rod,such as beam spot radius,the relation between the curvature radius of wavefront and the matrix elements.Bases on the stady,we also consider the reversal parabolic GRIN rod can be used as a laser collimation element.
1992, 16(4): 249-252.
Abstract:
In this paper,a sampling method for single pulse energy and data processing are reported.The detecting system is reasonably employed in measurement of nonlinear properties of the media,using synchro correlation detection technique and programme control.
In this paper,a sampling method for single pulse energy and data processing are reported.The detecting system is reasonably employed in measurement of nonlinear properties of the media,using synchro correlation detection technique and programme control.
1992, 16(4): 252-257.
Abstract:
By means of electromagnetic theory of light,this paper analyses the polarization state distribution of emergent light while the spherical wave front of the light is reflected by a Brewster polarizer. We find the device is not perfect,except in a special line.The result is useful for studying polarization aberration of Brewster polarizer in non-plane wave.
By means of electromagnetic theory of light,this paper analyses the polarization state distribution of emergent light while the spherical wave front of the light is reflected by a Brewster polarizer. We find the device is not perfect,except in a special line.The result is useful for studying polarization aberration of Brewster polarizer in non-plane wave.
