Slope efficiency characteristics of mode-hop driven tunable single-mode cholesteric liquid crystal laser
Slope efficiency characteristics of mode-hop driven tunable single-mode cholesteric liquid crystal laser
复制标题
DOI：
10.1117/12.893208
复制
发表时间：
2011-09
期刊：
影响因子：
--
通讯作者：
Yo Inoue;H. Yoshida;K. Inoue;Y. Shiozaki;H. Kubo;A. Fujii;M. Ozaki
中科院分区：
文献类型：
--
作者：
Yo Inoue;H. Yoshida;K. Inoue;Y. Shiozaki;H. Kubo;A. Fujii;M. Ozaki
本文报道了一种三层结构的可调谐液晶（ChLC）腔的可调谐单模激光输出。该器件由一个具有宽反射带的光聚合ChLC层、另一个具有陷波反射带的ChLC层和作为增益介质的掺杂罗丹明-6G的离子液体层组成。在这种器件结构中可以获得单模激光，因为具有陷波反射带的ChLC层仅强烈反射法布里-珀罗腔模式中的一个。通过调谐陷波ChLC的反射带来实现激射波长的调谐。该装置显示出16%的最大斜率效率，这被认为是约1.5倍大于普通的ChLC激光器掺杂的吡咯亚甲基597激光染料。
We report tunable single-mode lasing with an improved slope efficiency from a cholesteric liquid crystal (ChLC) cavity with a three-layered structure. The device consists of one photopolymerized ChLC layer with a wide reflection band, another ChLC layer with a notch reflection band and a Rhodamine-6G-doped ionic liquid layer acting as the gain medium. Single-mode lasing can be obtained in this device structure because the ChLC layer with the notch reflection band strongly reflects only one of the Fabry-Perot cavity modes. Tuning of the lasing wavelength is achieved by tuning the reflection band of the notch ChLC. The device showed a maximum slope efficiency of 16%, which was found to be approximately 1.5 times larger than that of ordinary ChLC lasers doped with the pyrromethene 597 laser dye.