共查询到20条相似文献,搜索用时 15 毫秒
1.
L. P. Feoktistov A. V. Charushin V. G. Louzhnov V. C. Roerikh Yu. A. Satov N. G. Shchepetov Yu. B. Smakovskii A. N. Starodub A. E. Stepanov N. P. Zaretskii 《Journal of Russian Laser Research》2002,23(6):503-516
The design and parameters of the UV-preionized discharge module Katran are described. A particular feature of the scheme is a high-voltage pulse formation technique for sharp discharge current ignition to stabilize the self-sustained glow discharge. The free-running laser based on the discharge module allows one to obtain high specific laser power exceeding 145 MW/liter in the P(20) line for the 10-m band for an active volume of 3 liters. Duration of the first spike of generation is 30 ns FWHM and energy content is about 65% of the total pulse energy. The high reliability and reproducibility of the module's operation for a wide range of parameters ensures laser suitability for different scientific and technical applications. 相似文献
2.
ZHENG Yongzhen Micheal X. 《核工业西南物理研究院年报(英文版)》2006,(1):64-65
Absorption spectroscopy is a fundamental technique for measuring quantities like inner-shell and double-electron excitations, photoionization, oscillator strength and autoionization, both for neutral and ionized atoms. Moreover, it is specifically useful for testing the validity of theoretical calculations of atomic or ionic structure. In spite of its importance, very little absorption spectroscopy of ionized species has been performed to this date, because of the difficulty in generating a suitably dense, stable and reproducible absorbing column of multicharged ions. 相似文献
3.
The fault-tolerant quantum computation scheme proposed by Gottesman (Phys. Rev. A 64, 012310 (2001)) can be performed using relatively simple linear optical resources and provides a natural protection against arbitrary small errors. On the other hand, preparing the initial GKP states is a difficult task. A few proposals to generate GKP states have been done over the last years. Our objective here is to analyze the performance of a particular GKP generator that uses cat states, linear optical devices, squeezing, and homodyne detection. We use numerical simulations to study the behavior of the fidelity between the generated and the ideal states and show that the proposal in consideration is indeed a promising scheme. 相似文献
4.
B. F. Kuntsevich 《Journal of Applied Spectroscopy》2002,69(3):388-394
The nonlinear dynamics of a CO2 laser having continuous electrical discharge pumping and loss modulation and generating in three vibrationalrotational lines of the same vibrational band is investigated theoretically. It is shown that it is possible to monitor the time and energy parameters of radiation in rather wide ranges by changing the depth and frequency of modulation and also the relationship between the constant components of losses. The character of the response of the threewave laser in loss modulation in one or two channels at certain parameters is similar to the response of a system with two degrees of freedom. In loss modulation simultaneously in three channels the response is equivalent to the response of a system with one degree of freedom. 相似文献
5.
《Solid State Ionics》1987,24(4):281-287
The electromotive force (EMF) of the COCO2 sensor using Na2CO3 and NASICON (Na3Zr2Si2PO12) as solid electrolytes has been examined in COCO2Ar atmospheres. The EMF is related to the partial pressures of CO and CO2 and proportional to log(P2CO2P−1CO). The simultaneous use of the oxygen sensor of stabilized zirconia gives the EMF proportional to log(PCO2P−1CO). The EMF's of two sensors permit to determine individually partial pressures of CO and CO2. The existence of H2 with high concentration does not affect the EMF's. This fact proves the applicability of the two-sensor system to the monitoring and the controlling of reducing atmospheres in industrial processes. 相似文献
6.
TheExperimentalStudyofa100WCopperVaporLaserCHENLinTAOYongxianYINXianhuaWANGRenwen(ShanghaiInstituteofOpticsandFineMechanics,C... 相似文献
7.
Zazymkina D. A. Ionin A. A. Kinyaevskiy I. O. Klimachev Yu. M. Kozlov A. Yu. Kormashova D. I. Kotkov A. A. Lampin J.-F. Mityagin Yu. A. Savinov S. A. Sagitova A. M. Sinitsyn D. V. Ionin M. V. 《Physics of Atomic Nuclei》2021,84(10):1765-1769
Physics of Atomic Nuclei - A terahertz NH3 laser optically pumped by “long” (~100 μs) pulses of an electron-beam-sustained-discharge CO2 laser is demonstrated for the first time.... 相似文献
8.
9.
DING Xin YAO Jianquan YU Yizhong YU Xuanyi XU Jingjun ZHANG Guangyin 《Chinese Journal of Lasers》2001,(6)
1 Introduction Ti∶sapphirelaseristhemostwidelytunablelaserinthecurrentlasertechnologyandhasatuningrangefrom 0 .68to 1 .1 μm .Soitis quiteimportantandusefulwithnonlinearopticalfrequencyconversiontechnologytoexpanditsoutputwavelength .Nonlinearwavelengthconver… 相似文献
10.
In this paper the theoretical and experimental results of sum-frequency mixing of a Ti∶sapphire laser and a 1.064 μm Nd∶YAG laser are presented. By using two KTP crystals cut at θ=76° and 85° (φ=90° in both crystals), respectively, the sum-frequency mixing tuning range from 459.3 to 509.6 nm in one Ti∶sapphire laser setup is experimentally achieved. The maximum output energy was 14.6 mJ and the energy conversion efficiency was up to 15.2%. 相似文献
11.
The performance of the upstream moderator for neutron beams 1, 4, 5, 6, and 9 extracted from the IBR-2 reactor is simulated towards selecting its optimum configuration. For different moderator options, gain factors with respect to the existing comb-shaped water moderator are computed. Taking into account the technological issues in manufacturing a combined moderator, the scheme with optimal physical characteristics is selected. 相似文献
12.
Modulation Frequency Multiplexed Tunable Diode Laser Spectroscopy System for Simultaneous CO, CO2 Measurements
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A modulation frequency multiplexed dual diode-laser system is developed for simultaneous detection of the two most common fire gas products CO and CO2. Simultaneous detection is achieved by modulating each laser at different frequencies, demodulating the signal by a pair of lock-in amplifiers for each gas. Laser beams are combined and detected by one detector after passing through an identical optical path. The experimental results show little performance degradation associated with modulation frequency multiplexing, and no cross-talk between the two multiplexed detection channels is measured. 相似文献
13.
ProposalforEfficiencyEnhancementofaFarInfraredFreeElectronLaser¥HUSuxing;FUEnsheng;XUZhizhan(ShanghaiInstiuteofOpticsandFineM... 相似文献
14.
1 Introduction BecauseLiF∶F- 2 color centercrystalhasitsowndistinguishedcharacteristics[1~ 5] ,ithasbeenusedasactivemediums[4 ,6,7] orasmodulatedelements[8,9] .Inthispaper,wewillintroduceanotherkindofusage ,thatis ,itisusedbothasanactivemediumforcolorcenterlasertuna… 相似文献
15.
A New Formula for the Spectra of Axial Symmetric and Transition Nuclei and a Quantity to Identify the Nuclear γ Deformation
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The analytical limits of a speacial potential of the Bohr Hamiltonian are discussed in detail.A new formula for the axial symmetric,triakial deformed and the γ-soft nuclei is presented.The nuclear γ deformation can be identified with this formula.The calculations of some nuclear yrast lines seproduce the experiment al results very Well,and the degree of the nuclear γ deformation is obtained. 相似文献
16.
Effects of Correlations Between the Real and Imaginary Parts of Quantum Noise on Intensity Fluctuation for a Single-Mode Laser 总被引:1,自引:0,他引:1
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We study the effects of correlations between the real and imaginary parts of quantum noise on the intensity fluctuation for a single-mode laser. The analytic expressions of the intensity correlation function C(r) and the associated relaxation time Tc in the case of a stable locked phase resulting from the cross-correlation λq between the real and imaginary parts of quantum noise are derived by means of projection operator method. Based on numerical computations it is found that the presence of cross-correlations between the real and imaginary parts of quantum noise causes the intensity fluctuation to increase. A slowing-down phenomenon exists in the sense that Tc increases as a function of |λq|. Thus the decay o[ intensity fluctuation becomes slower. 相似文献
17.
CHENGQing-Hua CAOLi WANGJun WUDa-Jin 《理论物理通讯》2004,42(3):365-368
Using the linear approximation method, we calculated the steady-state mean normalized intensity fluctuation for a loss-noise model of a single-mode laser driven by a pump noise and a quantum noise, whose real part and imaginary part are cross-correlated. We analyzed the valid range for the linear approximation method by studying the influences on the steady-state mean normalized intensity fluctuation by the cross-correlation coefficient, the intensities of the quantum and pump noise, the net gain, and the amplitude and frequency of the input signal, and we found that the valid range becomes wider when the cross-correlation between the real and imaginary part of quantum noise is weaker, the noise intensities of quantum and pump are weaker, the laser system is far from the threshold and the signal has smaller amplitude and higher frequency. 相似文献
18.
1IntroductionThestudyofdynamicalsystemsperturbedbynoiseisrecurentinmanycontextsofphysics.Inparticular,inthecontextofmorereali... 相似文献
19.
Using CO2 and N2O lasers, we have measured and assigned nineteen ν4 and nine ν6 rotation-vibration resonances of the type ΔM = 0 and M = J. These transitions were combined with the zero-field pure rotational spectra in order to determine the two fundamental vibrational frequencies, the rotational constants of both excited states, the Coriolis coupling constant, and the dipole moments of each of the three states. The ground-state rotational constants and centrifugal distortion constants were taken from a microwave study and the centrifugal distortion constants of the excited states were assumed equal to those of the ground state. The following results were obtained (standard deviations in parentheses):
938.0345 (6) | 989.2519 (18) | (cm?1) | ||||
139 579 (150) | 143 323 (150) | (MHz) | ||||
31 873.6 (5) | 32 379.5 (7) | (MHz) | ||||
26 242.9 (6) | 25 994.4 (8) | (MHz) | ||||
136 178 (770) | (MHz) | |||||
μ | 2.319 (10) | 2.347 (4) | (D) | |||
μ(ground state) | 2.3464 (8) | (D) |