Tunable laser action in a dye-doped nematic liquid-crystal waveguide under holographic excitation based on electric-field-induced TM guided-mode modulation
Tunable laser action in a dye-doped nematic liquid-crystal waveguide under holographic excitation based on electric-field-induced TM guided-mode modulation
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DOI：
10.1364/josab.21.001651
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发表时间：
2004-09
影响因子：
1.9
通讯作者：
T. Matsui;M. Ozaki;K. Yoshino
中科院分区：
文献类型：
--
作者：
T. Matsui;M. Ozaki;K. Yoshino
通过全息激发，在染料掺杂向列相液晶(NLC)光波导中实现了电调谐激光作用。光反馈由双光束干涉产生的分布反馈通过劳埃德镜结构提供。由于NLC分子的重新取向引起NLC核心层有效折射率的变化，从而实现了对激光波长的电调谐。基于波导模理论，对外加电场作用下的TM导模进行了数值分析，并详细研究了场诱导调谐激光波长。展望了实现单模运转和激光波长调谐的前景。
Electrically tunable laser action has been demonstrated in a dye-doped nematic liquid-crystal (NLC) waveguide by holographic excitation. The optical feedback was provided by the distributed feedback induced by two-beam interference by use of the Lloyd mirror configuration. Electrical tuning of the lasing wavelength was realized owing to the change of the effective refractive index of the NLC core layer caused by the reorientation of NLC molecules. On the basis of a waveguiding mode theory, numerical analysis of a TM guided mode in the presence of an applied electric field was performed, and field-induced tuning of the lasing wavelength was investigated in detail. Prospects for the realization of a single-mode operation and tuning of the lasing wavelength were also shown.