1993 Vol. 17, No. 2
Display Method:
1993, 17(2): 65-68.
Abstract:
In this article, the number of the artificial guide stars and the brightness of the guide stars used in the partial-correction adaptive optical system with 0.5 Strehl rate(or 0.13 residual rms wavefront error over the subaperture) have been presented. Comparing to the correspondent results of the conventional system, we find that the partial correction system is simple and easy to realize.
In this article, the number of the artificial guide stars and the brightness of the guide stars used in the partial-correction adaptive optical system with 0.5 Strehl rate(or 0.13 residual rms wavefront error over the subaperture) have been presented. Comparing to the correspondent results of the conventional system, we find that the partial correction system is simple and easy to realize.
1993, 17(2): 69-74.
Abstract:
The development situation of the military laser technology is reviewed. It is proposed that the important subject in this area should be heterodyne CO2 lidar in our country
The development situation of the military laser technology is reviewed. It is proposed that the important subject in this area should be heterodyne CO2 lidar in our country
1993, 17(2): 75-77.
Abstract:
Based on the conditions that the transverse amplification and the point source position of unstable resonator must be the real number, we have demonstrated the unstable conditions of the Gaussian reflectivity mirror(GRM) resonator and point out that using the GRM resonator is impossible to form an unstable resonator.
Based on the conditions that the transverse amplification and the point source position of unstable resonator must be the real number, we have demonstrated the unstable conditions of the Gaussian reflectivity mirror(GRM) resonator and point out that using the GRM resonator is impossible to form an unstable resonator.
1993, 17(2): 78-82.
Abstract:
In this paper, the designing and coating of special film system for near-infrared laser oscillation of Na2 are reported. In 1988, with this film, laser oscillation of the lowest triplet transition of Na2 was obtained for the first time.
In this paper, the designing and coating of special film system for near-infrared laser oscillation of Na2 are reported. In 1988, with this film, laser oscillation of the lowest triplet transition of Na2 was obtained for the first time.
1993, 17(2): 83-87.
Abstract:
In this paper,the correlation functions and spectrum functions of the laser scattering light in colloid for monodisperse system are demonstrated.These functions are based on the classical electromagnetic field theory and Brownnian movement. Under the condition of long time, the approximate expressions are presented too.
In this paper,the correlation functions and spectrum functions of the laser scattering light in colloid for monodisperse system are demonstrated.These functions are based on the classical electromagnetic field theory and Brownnian movement. Under the condition of long time, the approximate expressions are presented too.
1993, 17(2): 88-90.
Abstract:
This paper describes the overall design concept of the flight laser firing simulator and the application of the semiconductor in the simulator.
This paper describes the overall design concept of the flight laser firing simulator and the application of the semiconductor in the simulator.
1993, 17(2): 90-92.
Abstract:
In this paper a broad waveguide CO2 laser excited transversely by radio frenquency(RF) is presented. The size of the waveguide is 2mm×30mm×400mm. Laser output power is over 100W and the efficiency is about 10%.
In this paper a broad waveguide CO2 laser excited transversely by radio frenquency(RF) is presented. The size of the waveguide is 2mm×30mm×400mm. Laser output power is over 100W and the efficiency is about 10%.
1993, 17(2): 93-96.
Abstract:
This paper analysis the dispersion features of various gratings and presents the concept of the RGTD(reflective grating time dispersion). On this basis, the first order diffraction formula of the optical pulse is demonstrated.
This paper analysis the dispersion features of various gratings and presents the concept of the RGTD(reflective grating time dispersion). On this basis, the first order diffraction formula of the optical pulse is demonstrated.
1993, 17(2): 97-101.
Abstract:
Based on the ABCD matrix and Gaussian beam propagation theory, the Gaussian beam transforming formulas through a parabolic defocusing GRIN fiber lens are derived. The design principle of this defocusing fiber lens used as laser beam transforming device and application in an expanded beam coupling system are discussed.
Based on the ABCD matrix and Gaussian beam propagation theory, the Gaussian beam transforming formulas through a parabolic defocusing GRIN fiber lens are derived. The design principle of this defocusing fiber lens used as laser beam transforming device and application in an expanded beam coupling system are discussed.
1993, 17(2): 102-106.
Abstract:
A automatic null light instrument for measuring transverse magnetooptic Kerr effects with high sensitivity is introduced in this paper. The instrument can be used in the area of surface analysis, and we have applied it in studying the magnetic garnet films.
A automatic null light instrument for measuring transverse magnetooptic Kerr effects with high sensitivity is introduced in this paper. The instrument can be used in the area of surface analysis, and we have applied it in studying the magnetic garnet films.
1993, 17(2): 107-111.
Abstract:
In this paper, we report a high optical quality crystal Ti:Al2O3 grown with the use of Czochralski method. The effect of growing and annealing techniques on the crystal quality has been discussed. At the room temperature, we obtain 6.4mJ laser output(at 780nm wavelength), using Ti:Al2O3 laser rod 14.8mm long and a resonant cavity with the dispersion elements while a double frequency Nd:YAG laser(532nm wavelength, 35mJ output power) excites the laser. The laser efficiency is high up to 18%.
In this paper, we report a high optical quality crystal Ti:Al2O3 grown with the use of Czochralski method. The effect of growing and annealing techniques on the crystal quality has been discussed. At the room temperature, we obtain 6.4mJ laser output(at 780nm wavelength), using Ti:Al2O3 laser rod 14.8mm long and a resonant cavity with the dispersion elements while a double frequency Nd:YAG laser(532nm wavelength, 35mJ output power) excites the laser. The laser efficiency is high up to 18%.
1993, 17(2): 112-113.
Abstract:
1993, 17(2): 114-119.
Abstract:
This article reviews a variety of measurement techniques of ultrashort optical pulses, and emphasizes the basic physical principles, the advantages and defects of these measurement techniques.
This article reviews a variety of measurement techniques of ultrashort optical pulses, and emphasizes the basic physical principles, the advantages and defects of these measurement techniques.
1993, 17(2): 120-124.
Abstract:
The 8-shaped 4-mirror ring resonator containing two flat mirrors and two concave mirrors is widely used in color center lasers, laser gyroes and other research fields. With the model of a thermal thin lens, we give an equivalent linear cavity to analyst its beam characteristics. The thermal influences on its basic properties are discussed in detail. And the insensitive condition of the 4-mirror ring resonator to thermal thin lens is given. The results are useful to guide the resonator design and its application.
The 8-shaped 4-mirror ring resonator containing two flat mirrors and two concave mirrors is widely used in color center lasers, laser gyroes and other research fields. With the model of a thermal thin lens, we give an equivalent linear cavity to analyst its beam characteristics. The thermal influences on its basic properties are discussed in detail. And the insensitive condition of the 4-mirror ring resonator to thermal thin lens is given. The results are useful to guide the resonator design and its application.