Nutraceutical
发表于 2025-3-21 19:57:43
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难解
发表于 2025-3-21 23:54:50
Stability of Monochromatic Generations case established theoretical ideas led to the conclusion that it is possible to produce only one line within the width of the spontaneous emission line . In these investigations, however, either the optical inhomogeneity of the medium , or the change in the gain curve , established in Chapter in, was ignored.
Postmenopause
发表于 2025-3-22 01:27:25
Book 1970al and temporal development of generation, despite the obvious importance of such data in the use of giant light pulses in in vestigations of the nonlinear interaction of radiation and matter. From a systematic con sideration of a relatively simple model of a Q-switched laser we analytically inves
中和
发表于 2025-3-22 05:12:52
Monochromatic Generationproximation. The limitation on the increase in field may be due to the fact that the current induced by the field depends nonlinearly on the field. Physically non-linearity may occur when the probabilities of induced and relaxation transitions are comparable. Calculation of the current is a quantum-mechanical problem, to which Part I was devoted.
一美元
发表于 2025-3-22 10:45:02
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Glower
发表于 2025-3-22 13:49:24
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敌意
发表于 2025-3-22 18:49:54
Nonlinear Interactions of Electromagnetic Waves in an Active Medium and Their Possible Application teffects, such as Raman scattering, resonance fluorescence, etc., had been observed even before lasers were produced. Multiquantum processes were investigated theoretically in the early years of quantum mechanics; for instance, two-photon emission and absorption were examined as long ago as 1931 .
aggressor
发表于 2025-3-22 22:07:20
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讥笑
发表于 2025-3-23 02:18:13
Spontaneous Emission with Induced Transitions Taken into Accountted atom. Hence, the spectral composition of the spontaneous emission will also undergo changes. Thus, we must revise the theory of spontaneous emission and include induced transitions in it. This question is considered in this chapter.
tangle
发表于 2025-3-23 09:33:00
Some Questions of Gas Laser Theoryas formulated as long ago as the beginning of the twentieth century by Einstein , who predicted the process of induced emission. The second idea consisted essentially in the application of thermodynamically unstable and temporally unsteady systems. In such systems amplification (and not absorptio