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In order to meet the high demand of the entire technology processing, the error compensation method is usually used to correct them and is premised on a good understanding of error sources and the law of the errors. In this paper, based on the theories of Collins's Integral and Collins's EIKONAL Function and the MATLAB software, we simulated and calculated the spatial distribution of optical beam in the cavity of the ring laser gyro under the resonator's maladjustment caused by the technology processing. From the simulation results, we can get that to the small-gain lasers, the same amount of disorders in the different structures have different effects on the spatial distribution of the beam, and the structures using the spherical mirrors relatively have the small impact on the beam; under the same disorder in the same cavity shape, the signal light and the calibration light which are respectively detected from the mirror M 1 and M 4 are different; under the same structures, different mirrors with the same amount of disorder will cause the different beat frequency difference; because of the disorders, the spot centers of clockwise and counterclockwise waves happen shift and will seriously affect the normal operation of the laser gyro if the imbalance reaches a certain degree. This work has a guiding role in the mirror adjustment of the laser gyros' technology processing, and has a reference value to the survival rate of the laser gyros and the improvement of measurement accuracy.

In the paper, appearance and composition of an optical interference multi-layer coatings derived by sol-gel process were introduced. In particular, it is given that the distribution function of micro particles diameter size and the variety situation of porousness and graininess, as well as the influence of heat-treated temperature on optical quality of coatings. A lot of measurement result is supported by ESCA, AES, SEM and AFM and so on.

In this paper, Xe and He-Ne atomic lasers and CO2 molecular lasers excited by 30 MHz approximately 2 GHz frequency have been studied, and then put forward the key of getting high efficiency is how to control the electron energy of discharge space. In the mobility-dominated discharge space of Xe laser, the product of gas pressure and input power is constant. In He-Ne laser, the product of gas pressure and power supply frequency is a constant in plasma discharge space of the glass tube under the optimum laser output. As to the slab waveguide CO2 laser, the center of discharge space is quasi-Faraday dark region. But to the high power CO2 laser (flow gas) the discharge space is plasma. Since there demand much lower electron energy, and high density for CO2 laser, only in discharge structure there are several designing schemes can be referenced.© (1998) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

In this paper, we think that in rf discharge carbon-dioxide lasers there are only cathode space and quasi-Faraday dark region but not plasma area. The electron motive equation in the cathode space and quasi-Faraday region of the rf discharge space are given. We use the ponder motive force to calculate the electron energy in these spaces as well as the size of the quasi-Faraday dark region. At last, some problems of the high power carbon-dioxide laser are discussed.© (1997) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

study laser. But we think that it needs revise too.The photon degeneracy of laser beam is the most nature of lasers. macroscopic parameter is power (energy)and coherence. In there. coherence includes the space coherence and time coherence. if we discuss the problem ofspace quality oflaser beam we should discuss the beam space coherence except for power and energy. It is luckly.space coherence is determind by the product of beam waist spot—size and divergence angle of far field and haverelation with the space intensity distribution of beam.

In this paper, the dynamical behaviors of the class D lasers with modulated term are investigated numerically. The result shows that there exists the so-called generalized bistability in the period-doubling bifurcations, and the two stable states possess space reflected symmetry.© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

In the previous reports, investigations of DC discharge, pulsed discharge were described and RF discharge pumped frequency of Xenon laser is about 20MHz-30MHz. In this paper we report more high frequency pumping laser 3.508´ radiation in neutral Xenon using a transversely excited pure Xenon and helium-Xenon discharge. The discharge constructure is 1). the glass discharge tube is put in the stripline and 2). the matel parallel electrodes is made discharge tube. The discharge is excited traveling wave with 200MHz-1000MHz. The result of experiment indicate that satisfactory frequency is 200MHz-460MHz for glass discharge tube and about 640MHz for matel parallel electrodes. We also observed that product of pressure with input power as maximum output laser power is constant and relative efficiency no charge for pure Xe lasers in matel parallel electrodes. We had measured 9923 angstrom spontaneous radiation by OMA-III as the frequency of excited discharge is changed. Since the transitions originates on the lower laser level. It's intensity relates to laser radiation.© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

A study of RF discharge for CO2 lasers is made on the basis of RF discharge theory. The relation among dimension of potential fall area, excitation frequency, gas pressure and other parameters is given. The relation among dimension of central dim area, excitation frequency and other parameters is given as well. The study shows dimension of potential area to contract with increasing excitation frequency and gas pressure; dimension of central dim area increases when excitation frequency and gas pressure increases. These results are consistent with experimental results. In the first type of RF discharge, the central dim area is not plasma. In the second type of RF discharge, the central bright area is plasma.© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.