【摘要】 本文报道在1.32μm声光Q开关Nd:YAG激光器泵浦下,从多模光纤中获得由受激喇曼散射及四光子混频产生的宽带非线性散射谱的实验。结果表明,在1.32μm泵浦下产生了明显的连续谱本底,并认为它是由光纤零材料色散区的宽带参量增益四光子混频产生的。观察到激光器1.34μm微弱输出在光纤中明显放大的新现象,并指出放大来自玻璃光纤的宽带喇曼增益。更多还原

【Abstract】 Generation of wideband Raman scattering spectra in multimode optical fibres, pumped by an 1.32μm A-O Q-switched Nd:YAG laser, is reported. Discussion shows that the spectra are generated by stimulated Raman scattering and four-photon mixing. Results show that considerable optical continuum is formed because 1.32μm pumping and its Stokes components are near the zero-material-dispersion range of fibers. A new amplification phenomena of the small 1.34μm output of the laser in fibers is observed. It is considered that the amplification comes from the wideband Raman gain of the glass optical fibers.更多还原