Polymeric distributed-feedback resonator with sub-micrometer fibers fabricated by two-photon induced photopolymerization

@article{Li2007PolymericDR,
  title={Polymeric distributed-feedback resonator with sub-micrometer fibers fabricated by two-photon induced photopolymerization},
  author={Chun-Fang Li and Xianzi Dong and Feng Jin and Wei Jin and Wei-qiang Chen and Zhen Sheng Zhao and Xuan-Ming Duan},
  journal={Applied Physics A},
  year={2007},
  volume={89},
  pages={145-148}
}
The authors observed amplified spontaneous emission (ASE) action with an ultra-low threshold under optical excitation from an active polymeric distributed-feedback (DFB) resonator which consists of sub-micrometer fiber grating. A dendrimer was used to modify the laser dye and increased its concentration up to 4.95 wt. % in the photocured resin. The DFB resonator was fabricated by using two-photon induced polymerization (TPIP) technique. The ASE at 556 nm was observed with a threshold of 0.30 μJ… 
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