Related Experiment Video
Updated: Jan 26, 2026

Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications
Published on: June 2, 2017
Operating Characteristics of High-Order Distributed Feedback Polymer Lasers
Puxi Zhou1, Lianze Niu2, Anwer Hayat3
1Department of Electrical Engineering and Computer Science, Samueli School of Engineering, University of California Irvine, Irvine, CA 92697, USA. puxiz@uci.edu.
Abstract:
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 2nd, 3rd, and 4th 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.
Related Concept Videos
Receiver Operating Characteristic Plot
Polymers: Molecular Weight Distribution
Feedback Inhibition
Polymers
Feedback Loops
Effects of feedback
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...

