4 March 2014 Simplified hollow-core microstructural optical fiber laser with intense output and polarized radial emission
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Abstract
We demonstrate a novel simplified hollow-core microstructural optical fiber (SHMOF) laser with intense output and purely radial emission. The SHMOF comprises a large hexagonal core with six surrounding crown-like air holes. The microfluidic channel is composed of a nearly cylindrical center hole of the SHMOF, which is made by selectively blocking off other holes of the SHMOF. The novel SHMOF based laser device is integrated with the silica ring surroundings and the gain medium microchannel. The fiber core formed cavity which filled with a microfluidic gain medium (Rhodamine 6G) plug was lateral pumped by a nanosecond pulse laser. For pump energy at threshold as low as 80 nJ/pulse, single mode laser oscillation was observed at about 570 nm. And when pump energy was added to a higher value above the threshold, an intense output of a unique radiating field pattern characterized by cylindrical symmetry emerged in the azimuthal direction of the fiber. The explanation of this result lies in the particularity structure of the SHMOF in our experiment. This attractive capability presents opportunities in fiber laser array composed microsystems and fluorescence signal amplification for chemical and biological analysis.
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Zhi-Li Li, Wen-Yuan Zhou, Yan-Ge Liu, Min Yan, Jian-Guo Tian, "Simplified hollow-core microstructural optical fiber laser with intense output and polarized radial emission", Proc. SPIE 8960, Laser Resonators, Microresonators, and Beam Control XVI, 89600K (4 March 2014); doi: 10.1117/12.2037497; https://doi.org/10.1117/12.2037497
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