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Distributed-feedback laser based on low-scattering and high-gain holographic polymer dispersed liquid crystal grating

Diao Zhi-Hui Huang Wen-Bin Deng Shu-Peng Liu Yong-Gang Peng Zeng-Hui Yao Li-Shuang Xuan Li

Distributed-feedback laser based on low-scattering and high-gain holographic polymer dispersed liquid crystal grating

Diao Zhi-Hui, Huang Wen-Bin, Deng Shu-Peng, Liu Yong-Gang, Peng Zeng-Hui, Yao Li-Shuang, Xuan Li
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  • Received Date:  08 April 2012
  • Accepted Date:  04 September 2012
  • Published Online:  05 February 2013

Distributed-feedback laser based on low-scattering and high-gain holographic polymer dispersed liquid crystal grating

  • 1. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Science, Changchun 130033, China;
  • 2. University of Chinese Academy of Sciences, Beijing 100049, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant Nos. 60736042, 11174274, 11174279).

Abstract: In this paper, we utilize the acrylate monomer of low functionality to fabricate a holographic polymer dispersed liquid crystal grating with polymer-scaffolding morphology. It is effective to reduce the scattering loss in the grating which acts as a resonator in distributed-feedback laser since there is no droplet of liquid crystal. Moreover, the use of the monomer with high refractive index (RI) ensures the formation of grating with high RI modulation and, correspondingly, high feedback gain. For these two factors mentioned above, an excellent laser property is obtained from the dye-doped laser pumped by Nd:YAG pulse laser at 532 nm. A spectral linewidth of 0.3 nm is observed at pump energy threshold 0.8 μJ/pulse and a conversion efficiency of 1.2% is achieved at operating wavelength 635 nm. The laser performance is improved in some aspects such as threshold energy, linewidth and conversion efficiency to some extent compared with those reports proeviously.

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