From amplified spontaneous emission to laser oscillation: dynamics in a short cavity polymer laser

Authors
van den Berg, SA den Bezemer, RHV Schoo, HFM 't Hooft, GW Eliel, ER
Citation
Sa. Van Den Berg et al., From amplified spontaneous emission to laser oscillation: dynamics in a short cavity polymer laser, OPTICS LETT, 24(24), 1999, pp. 1847-1849
Citations number
12
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICS LETTERS
ISSN journal
01469592 → ACNP
Volume
24
Issue
24
Year of publication
1999
Pages
1847 - 1849
Database
ISI
SICI code
0146-9592(199912)24:24<1847:FASETL>2.0.ZU;2-F
Abstract
We present an experimental study of the input-output characteristics of an ultrashort pumped P-conjugated polymer in solution. By comparing the result s for configurations with zero, one, and two mirrors around the polymer, we show that the physics is driven by amplified spontaneous emission and not by cooperative emission. This finding is substantiated by picosecond-time-s cale measurements of the evolution of the emission of the polymer. For the two-mirror configuration a sharply defined threshold for laser oscillation is found; the output of the laser exhibits strong pulsations. (C) 1999 Opti cal Society of America OCIS codes: 140.7300, 140.3380.