Yamashita Kenichi, Ito Masahiro, Sugimoto Shuhei, Morishita Takashi, Oe Kunishige
Department of Electronics, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki Goshokaidocho, Sakyo-ku, Kyoto 606-8585, Japan.
Opt Express. 2010 Nov 8;18(23):24092-100. doi: 10.1364/OE.18.024092.
A plastic waveguide laser doped with organic dye molecule was fabricated with self-written active (SWA) waveguide technique. The device has a Fabry-Perot resonator consisting of a pair of highly reflective dielectric mirrors, which has brought two advantages for efficient optical pumping; (i) the efficient optical feedback in the cavity can be induced, and (ii) the reflection band of the dielectric mirrors can be tuned to overlap only with the emission band of the doped dye. For the SWA waveguide devices, furthermore, the active waveguide core is essentially coupled with a fiber port for optical input. Owing to these advantages, an experimental configuration for the optical end pumping can be easily applied. The high absorption efficiency for the pumping light could be obtained in this pumping method. A remarkable lowering of the lasing threshold was observed. As the best results of this study, consequently, the lasing action under the optical pumping energy as low as 50 nJ was achieved.
采用自写入有源（SWA）波导技术制备了一种掺杂有机染料分子的塑料波导激光器。该器件具有由一对高反射介质镜组成的法布里-珀罗谐振器，这为高效光泵浦带来了两个优点：（i）可在腔内诱导出高效的光反馈，（ii）介质镜的反射带可调整为仅与掺杂染料的发射带重叠。此外，对于SWA波导器件，有源波导芯本质上与用于光输入的光纤端口耦合。由于这些优点，光端泵浦的实验配置可以很容易地应用。在这种泵浦方法中可以获得泵浦光的高吸收效率。观察到激光阈值显著降低。因此，作为本研究的最佳结果，实现了低至50 nJ的光泵浦能量下的激光作用。
