Stimulated Rayleigh-Bragg scattering enhanced by two-photon excitation

被引：20

作者：

He, GS ^{[1
]}

Lin, TC ^{[1
]}

Prasad, PN ^{[1
]}

机构：

[1] SUNY Buffalo, Inst Lasers Photon & Biophoton, Buffalo, NY 14260 USA

来源：

OPTICS EXPRESS | 2004年 / 12卷 / 24期

关键词：

D O I：

10.1364/OPEX.12.005952

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 similar to 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. (C) 2004 Optical Society of America.

引用

页码：5952 / 5961

页数：10

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