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Proceedings Paper

26dB optical gain in a rib waveguide dye-doped polymer amplifier operating at 625 nm
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Paper Abstract

We demonstrate optical signal amplification in a solid-state dye-doped polymer with a rib waveguide structure. The device consists of a 1μm x 120μm poly(methyl methacrylate) (PMMA) waveguide, doped with 1% by weight Rhodamine 640 dye, spin coated onto a silica substrate. A 625nm pulsed signal and a co-linear 575nm pump are facet coupled into the waveguide and optical amplification of the signal is demonstrated. Depending on the signal intensity, a maximum internal gain in the 21-26dB range at 625nm is achieved using a 1.2cm long waveguide. The device exhibits a promising signal-to-noise ratio in the 9-16dB range and has the potential for tuning in a 40-50nm wavelength window with the same dye, and throughout the visible spectrum using other dyes. The wavelength operating range of this device is also analyzed. We therefore present a compact, easy to fabricate, high gain block suitable for use in conjunction with plastic optical fibers, which have a low-loss window at around 640nm. Since most of the optical amplification takes place in a short region (<10μm), an even more compact device geometry can be envisaged using a shorter waveguide.

Paper Details

Date Published: 4 April 2005
PDF: 9 pages
Proc. SPIE 5724, Organic Photonic Materials and Devices VII, (4 April 2005); doi: 10.1117/12.590359
Show Author Affiliations
Mark A. Reilly, Univ. of Cambridge (United Kingdom)
Miguel Ramon, Imperial College of Science, Technology and Medicine (United Kingdom)
Claudio Marinelli, Univ. of Cambridge (United Kingdom)
Christopher N. Morgan, Univ. of Cambridge (United Kingdom)
Marilu Ariu, Imperial College of Science, Technology and Medicine (United Kingdom)
Ruidong Xia, Imperial College of Science, Technology and Medicine (United Kingdom)
Richard V. Penty, Univ. of Cambridge (United Kingdom)
Ian H. White, Univ. of Cambridge (United Kingdom)
Donal D. C. Bradley, Imperial College of Science, Technology and Medicine/London (United Kingdom)

Published in SPIE Proceedings Vol. 5724:
Organic Photonic Materials and Devices VII
James G. Grote; Toshikuni Kaino; Francois Kajzar, Editor(s)

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