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Updated: Jan 25, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
Published on: April 24, 2014
Controlling the Performance of Polymer Lasers via the Cavity Coupling
Shuai Zhang1, Junhua Tong2, Chao Chen3
1Institute of Information Photonics Technology, College of Applied Sciences, Beijing University of Technology, Beijing 100124, China. zhangshuai@emails.bjut.edu.cn.
Abstract:
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.
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