A characterization of Rhodamine 640 for optical amplification

Collinear pump and signal gain properties in solutions, thin-film polymer dispersions, and waveguides

M. C. Ramon, M. Ariu, R. Xia, D. D.C. Bradley, M. A. Reilly, C. Marinelli, C. N. Morgan, R. V. Penty, I. H. White

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We report a study of the optical signal amplification properties of Rhodamine 640 in solution, in thin-film format dispersed within a poly(methyl methacrylate) (PMMA) polymer matrix, and in a waveguiding structure created by coating polymer-dispersed Rhodamine 640 onto a patterned quartz substrate. The optical signal amplification experiments were carried out using a collinear pump and signal setup. Depending on both pump and signal energies, gains of up to 41 dB were achieved in solution, while 1% by weight dye-doped PMMA films showed net gains of 54 cm-1, and associated losses of 16 cm-1. Using the same concentration dye/PMMA dispersions, waveguide structures were fabricated with a 120×1 μm2 cross section and a length of 1.2 cm. The internal optical gain values measured at 625 and 650 nm were found to be as high as 26 and 8 dB, respectively. The corresponding signal-to-noise ratio was in the 7-21-dB range at 625 nm and in the 3-21-dB range at 650 nm. Both in solution and in the waveguide structures we found that amplified spontaneous emission had a detrimental effect on the optical gain characteristics through a decrease in the signal-to-noise ratio.

Original languageEnglish
Article number073517
JournalJournal of Applied Physics
Volume97
Issue number7
DOIs
Publication statusPublished - 1 Apr 2005

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

A characterization of Rhodamine 640 for optical amplification : Collinear pump and signal gain properties in solutions, thin-film polymer dispersions, and waveguides. / Ramon, M. C.; Ariu, M.; Xia, R.; Bradley, D. D.C.; Reilly, M. A.; Marinelli, C.; Morgan, C. N.; Penty, R. V.; White, I. H.

In: Journal of Applied Physics, Vol. 97, No. 7, 073517, 01.04.2005.

Research output: Contribution to journalArticle

Ramon, M. C. ; Ariu, M. ; Xia, R. ; Bradley, D. D.C. ; Reilly, M. A. ; Marinelli, C. ; Morgan, C. N. ; Penty, R. V. ; White, I. H. / A characterization of Rhodamine 640 for optical amplification : Collinear pump and signal gain properties in solutions, thin-film polymer dispersions, and waveguides. In: Journal of Applied Physics. 2005 ; Vol. 97, No. 7.
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