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Proceedings Paper

Slope efficiency characteristics of mode-hop driven tunable single-mode cholesteric liquid crystal laser
Author(s): Yo Inoue; Hiroyuki Yoshida; Kenta Inoue; Yusuke Shiozaki; Hitoshi Kubo; Akihiko Fujii; Masanori Ozaki
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Paper Abstract

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.

Paper Details

Date Published: 8 September 2011
PDF: 9 pages
Proc. SPIE 8114, Liquid Crystals XV, 811415 (8 September 2011); doi: 10.1117/12.893208
Show Author Affiliations
Yo Inoue, Osaka Univ. (Japan)
Hiroyuki Yoshida, Osaka Univ. (Japan)
Kenta Inoue, Osaka Univ. (Japan)
Yusuke Shiozaki, Osaka Univ. (Japan)
Hitoshi Kubo, Osaka Univ. (Japan)
Akihiko Fujii, Osaka Univ. (Japan)
Masanori Ozaki, Osaka Univ. (Japan)


Published in SPIE Proceedings Vol. 8114:
Liquid Crystals XV
Iam Choon Khoo, Editor(s)

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