Theory of stimulated Raman scattering with broad-band lasers
Theory of stimulated Raman scattering with broad-band lasers
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DOI：
10.1103/physreva.19.2304
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发表时间：
1979-06
影响因子：
2.9
通讯作者：
M. Raymer;J. Mostowski;J. Carlsten
中科院分区：
文献类型：
--
作者：
M. Raymer;J. Mostowski;J. Carlsten
摘要：作者扩展了受激拉曼散射理论，包括激光带宽的影响，在瞬态和稳态制度。两个相互作用的激光束，泵浦激光和探测（斯托克斯）激光的情况下，处理。利用激光带宽的相位扩散模型，证明了在无色散情况下，前向拉曼增益在高增益极限下基本上与激光带宽无关，而在低增益极限下增益系数与带宽之和成反比。当抽运光带宽远大于拉曼介质的线宽时，在高增益极限下，受激斯托克斯光输出呈现与抽运光相同的光谱。这些结果的一个可能的解释进行了讨论，假设相位锁定的斯托克斯相位的泵浦激光相位的波动，由于通过拉曼介质的两个光束的非线性相互作用。
Abstract : The authors have extended the theory of stimulated Raman scattering to include the effects of laser bandwidths, in both the transient and steady-state regimes. The case of two interacting laser beams, a pump laser and a probe (Stokes) laser, is treated. Using the phase-diffusion model for laser bandwidth, the authors demonstrate that in the absence of dispersion, the forward Raman gain is essentially independent of the laser bandwidths in the high-gain limit, while in the low gain limit the gain coefficient is inversely proportional to the sum of the bandwidths. It is further shown that when the pump-laser bandwidth is much larger than the linewidth of the Raman medium, the stimulated Stokes output assumes the same spectrum as the pump laser in the high-gain limit. A possible interpretation of these results is discussed assuming a phase-locking of the Stokes phase to the fluctuations in the pump-laser phase, due to the nonlinear interaction of the two beams through the Raman medium.