Optical gain at 650 nm from a polymer waveguide with dye-doped cladding

M. A. Reilly, B. Coleman, E. Y.B. Pun, R. V. Penty, I. H. White, M. Ramon, R. Xia, D. D.C. Bradley

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45 Citations (SciVal)


Signal amplification at the polymer optical fiber low-loss window of 650 nm is reported in an SU8 rib waveguide coated with Rhodamine-640 doped poly(methyl methacrylate). A signal beam is end-fired into the facet of a 7×100 μm waveguide and amplified by top pumping of the 2-μm -thick cladding region with a pulsed pump source focused into a 9-mm-long stripe. A gain of 14dB and a minimum signal-to-noise ratio of around 2 dB are achieved in a 15-mm-long device with a low threshold pump intensity of 0.25 μJ mm2, which is an order of magnitude lower than previously reported.

Original languageEnglish
Article number231116
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number23
Publication statusPublished - 12 Dec 2005

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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