Controlling the Performance of Polymer Lasers via the Cavity Coupling

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
Main Authors: Shuai Zhang, Junhua Tong, Chao Chen, Fengzhao Cao, Chengbin Liang, Yanrong Song, Tianrui Zhai, Xinping Zhang
Format: Article
Language:English
Published: MDPI AG 2019-05-01
Series:Polymers
Subjects:
DFB polymer lasers
cavity coupling
azimuthally polarized output
lasing threshold
Online Access:https://www.mdpi.com/2073-4360/11/5/764
Description
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

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