Controlling the Performance of Polymer Lasers via the Cavity Coupling

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...

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Bibliographic Details
Published in:Polymers 2019-05, Vol.11 (5), p.764
Main Authors: Zhang, Shuai, Tong, Junhua, Chen, Chao, Cao, Fengzhao, Liang, Chengbin, Song, Yanrong, Zhai, Tianrui, Zhang, Xinping
Format: Article
Language:English
Subjects:
Coupling
Experiments
Glass substrates
Lasers
Performance enhancement
Polymers
Simulation
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Summary: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.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym11050764