Operating characteristics of a travelling-wave semiconducting polymer optical amplifier

G Heliotis, DDC Bradley, M Goossens, S Richardson, Graham Alexander Turnbull, Ifor David William Samuel

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

We report a study of light amplification in dilute solutions of the semiconducting polymer poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT). The operating characteristics of the F8BT solution amplifier are investigated in detail, and we show that it provides a large optical gain (>40 dB/cm) across a wide (>48 nm) spectral bandwidth in the green. The saturation characteristics of the amplifier are found to be in excellent agreement with theoretical predictions, allowing an estimate of the F8BT stimulated emission cross-section, sigma. We find sigmasimilar to1.7x10(-16) cm(2), comparable with the reported values for established laser dyes and other high-gain conjugated polymers. (C) 2004 American Institute of Physics.

Original languageEnglish
Pages (from-to)6122-6124
Number of pages3
JournalApplied Physics Letters
Volume85
DOIs
Publication statusPublished - 20 Dec 2004

Keywords

  • CONJUGATED POLYMER
  • GAIN MEDIA
  • EMISSION
  • LASERS

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