Stimulated Rayleigh-Bragg scattering enhanced by two-photon excitation

Guang S. He, Tzu Chau Lin, Paras N. Prasad

研究成果: 雜誌貢獻期刊論文同行評審

20 引文 斯高帕斯(Scopus)


A frequency-unshifted and backward stimulated Rayleigh scattering can be produced in a linearly transparent but two-photon absorbing medium. Using a novel two-photon active dye solution as the nonlinear medium pumped by 532-nm and ∼10-ns laser pulses, a highly directional backward stimulated scattering at the pump wavelength can be readily observed. The experimental results on spectral structure, spatial and temporal behaviors, and output/input relationship of this new type of stimulated scattering are presented. To explain the observed phenomenon and its experimental behaviors, a physical model of feedback mechanism provided by a two-photon-excitation enhanced Bragg grating inside the scattering medium is proposed. Comparing to other types of stimulated scattering, the stimulated Rayleigh-Bragg scattering exhibits the advantages of no-frequency shift, low threshold, and low requirement for pump spectral line-width.

頁(從 - 到)5952-5961
期刊Optics Express
出版狀態已出版 - 11月 2004


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