Operating Characteristics of High-Order Distributed Feedback Polymer Lasers

Polymers

Puxi Zhou¹  Lianze Niu²  Anwer Hayat²  Xinping Zhang²  Fengzhao Cao²  Tianrui Zhai² 

[1] Department of Electrical Engineering and Computer Science, Samueli School of Engineering, University of California Irvine, Irvine, CA 92697, USA;Institute of Information Photonics Technology and College of Applied Sciences, Beijing University of Technology, Beijing 100124, China;

关键词: polymer lasers;    high-order;    laser threshold;    slope efficiency;   

DOI  :  10.3390/polym11020258

来源: DOAJ

【 摘 要 】

In this study, high-order distributed-feedback (DFB) polymer lasers were comparatively investigated. Their performance relies on multiple lasing directions and their advantages include their high manufacturing tolerances due to the large grating periods. Nine laser cavities were fabricated by spin-coating the gain polymer films onto a grating structure, which was manufactured via interference lithography that operated at the 2^nd, 3^rd, and 4^th DFB orders. Low threshold lasing and high slope efficiency were achieved in high-order DFB polymer lasers due to the large grating groove depth and the large gain layer thickness. A high-order DFB configuration shows possible advantages, including the ability to control the lasing direction and to achieve multiple-wavelength lasers. Furthermore, our investigation demonstrates that the increase in threshold and decrease in slope efficiency with an increase in the feedback order can be limited by controlling the structural parameters.

【 授权许可】

Unknown