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Stimulated Raman scattering (SRS) in a long-distance fiber-optic communication line with wavelength-division multiplexing (WDM) is studied theoretically at a high power of the signal transmitted. A new criterion for determining the SRS threshold is used to calculate the critical input power versus the number of optical channels and frequency separation between them. The theoretical model is verified experimentally. SRS interaction between two channels in a communication line with an SRS amplifier for which the optical waveguide of the line serves as a nonlinear medium is measured. 相似文献
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The results of investigations of the electrical and thermal conductivity of indium in the pressure range up to 27 GPa and
at temperatures up to 1000 K are presented. In this pressure range, the electrical resistance of indium samples is measured
under multishock compression. The equation of state constructed for indium is used to calculate the evolution of the thermodynamic
parameters of indium in shock wave experiments; then, the dependences of the electrical resistivity and thermal conductivity
coefficient on the volume and temperature are determined. It is demonstrated that, in the pressure and temperature ranges
under investigation, the thermal conductivity coefficient of indium does not depend on temperature and its threefold increase
is caused only by the change in the volume under compression. 相似文献
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Calculations are made for the dynamic susceptibility of a weakly ferromagnetic mesoparticle in the macroscopic quantum coherence
region and the probability of conservation of the initial polarized state in a pulsed magnetic field.
Fiz. Tverd. Tela (St. Petersburg) 39, 1240–1243 (July 1997) 相似文献
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A new variant of the method of finding the equation of state in the Mie–Grüneisen form is presented. It is based only on high-pressure isotherms of solids. Using this procedure, the semiempirical equation of state and shock adiabats of solids may be found at high pressures and high temperatures. The method is tested on periclase MgO within the range of shock pressures up to 300–500 GPa. 相似文献
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Magnetic Transformations and Polymorphic Transition of Ferromagnetic Steels under Shock-Wave Loading
Technical Physics - A method for recording magnetic transformation is presented for ferromagnetic steels under shock-wave loading. The operation of the magnetic transformation gauge is considered... 相似文献
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Yu. V. Afonin A. P. Golyshev A. M. Orishich Yu. M. Prikhod’ko V. P. Fomichev 《Thermophysics and Aeromechanics》2009,16(3):491-498
CO2 lasers with transverse discharge and convective gas cooling find ever-increasing application. On strategy in making such
lasers more efficient radiators is increasing the rate of the gas flow through the discharge zone with the help of diametral
disk fans-heat exchangers. The application of such fans-heat exchangers, however, entails serious difficulties related to
the glow discharge-gas flow interaction. In the present study, we investigate the stability problem for volume discharge in
the gas loop of a CO2 laser with diametral dis fans-heat exchangers. 相似文献
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