Two-dimensional distributed feedback lasers using a broadband, red polyfluorene gain medium

Autor:	Ifor D. W. Samuel, Donal D. C. Bradley, Ruidong Xia, G. Heliotis, Piers Andrew, William L. Barnes, Graham A. Turnbull
Rok vydání:	2004
Předmět:	Amplified spontaneous emission Materials science Active laser medium business.industry Physics::Optics General Physics and Astronomy Output coupler Injection seeder Laser law.invention Semiconductor laser theory Optics law Optoelectronics Photonics business Tunable laser
Zdroj:	Journal of Applied Physics. 96:6959-6965
ISSN:	1089-7550 0021-8979
Popis:	We report the fabrication of widely tuneable (627–702nm) optically pumped two-dimensional distributed feedback polymer lasers that utilize a red-emission fluorene copolymer as the active gain medium. The lasers exhibit efficient, low threshold operation and emit highly directional output beams as a result of the enhanced two-dimensional photonic confinement provided by the employed resonator. Their emission and operating characteristics are described in detail. We demonstrate that the very wide spectral range (Δλ⩾75nm) over which these lasers can be systematically tuned is in very good agreement with theoretical predictions based on a simple waveguide model. In addition, we show that the lasers have long operating lifetimes τ1∕2⩾2×107 pulses and we discuss the impact that degradation has on the laser output characteristics.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f9b1433df447197d0f47c99a82cb3bca https://doi.org/10.1063/1.1811374 Zobrazit plný text záznamu