Zhu X L, Lam S K, Lo D
Department of Physics, Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
Appl Opt. 2000 Jun 20;39(18):3104-7. doi: 10.1364/ao.39.003104.
Dye-doped solgel silica lasers with distributed feedback were demonstrated. Solgel silica slabs doped with Rhodamine 6G or Coumarin 460 dyes were fabricated. Periodic gain modulation in dye-doped solgel silica slabs were created by the interference pattern of the pumped laser beams diffracted by a holographic grating. Laser pulse trains with subnanosecond spikes were induced. Laser emission wavelengths were centered at 480 and 585 nm for Rhodamine 6G and Coumarin 460, respectively. It was possible for us to tune approximately 20 nm around the emission centers by varying the intersection angle. The laser linewidth was of the order of 60 pm.
展示了具有分布反馈的染料掺杂溶胶-凝胶二氧化硅激光器。制备了掺杂若丹明6G或香豆素460染料的溶胶-凝胶二氧化硅平板。通过全息光栅衍射的泵浦激光束的干涉图样，在染料掺杂的溶胶-凝胶二氧化硅平板中产生了周期性增益调制。诱导出了具有亚纳秒尖峰的激光脉冲序列。对于若丹明6G和香豆素460，激光发射波长分别以480和585 nm为中心。通过改变相交角度，我们有可能在发射中心周围调谐约20 nm。激光线宽约为60 pm。
