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Controlling the Performance of Polymer Lasers via the Cavity Coupling

Institute of Information Photonics Technology, College of Applied Sciences, Beijing University of Technology, Beijing 100124, China
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Polymers 2019, 11(5), 764; https://doi.org/10.3390/polym11050764
Received: 9 April 2019 / Revised: 25 April 2019 / Accepted: 25 April 2019 / Published: 1 May 2019
(This article belongs to the Special Issue Laser Processing of Polymer Materials)
The polarization and threshold of distributed feedback (DFB) polymer lasers were controlled by adjusting the cavity coupling. The cavity of DFB polymer lasers consisted of two gratings, which was fabricated by a two-beam multi-exposure holographic technique. The coupling strength of the cavity modes was tuned by changing the angle between the two gratings. The threshold of the polymer lasers decreased with reducing the coupling strength of the cavity modes. A minimum threshold was observed at the lowest coupling strength. Moreover, the azimuthally polarized output of the polymer lasers was modified by changing the cavity coupling. These results may provide additional perspectives to improve the performance of DFB polymer lasers. View Full-Text
Keywords: DFB polymer lasers; cavity coupling; azimuthally polarized output; lasing threshold DFB polymer lasers; cavity coupling; azimuthally polarized output; lasing threshold
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Zhang, S.; Tong, J.; Chen, C.; Cao, F.; Liang, C.; Song, Y.; Zhai, T.; Zhang, X. Controlling the Performance of Polymer Lasers via the Cavity Coupling. Polymers 2019, 11, 764.

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