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Proceedings Paper

Optical gain in dye-doped polymer waveguides using oxidized porous silicon cladding
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Paper Abstract

We report on a novel organic/inorganic hybrid waveguide approach, which is composed of a cladding of extremely low refractive index oxidized porous silicon formed on a bulk silicon substrate and of it, a polymeric (polymethylmethacrylate) core doped with a visible laser dye (Nile-Blue) was deposited by spin coating. The waveguiding properties of the structures have been characterised by means of the m-line technique, demonstrating that the use of oxidized porous silicon as a cladding can considerably improve the mode confinement factor of single-mode waveguides. The low refractive index achievable in the cladding (n=1.16) allows forming waveguides with a low index polymer cores. Variable stripe length (VSL) measurements have been also performed in order to characterise the amplification properties of the waveguides. We demonstrate a clear transition from losses to gain at 694nm with a pump threshold of 28mJ/cm2. Values of net optical gain up to 104dB/cm have been measured at this wavelength.

Paper Details

Date Published: 12 June 2007
PDF: 8 pages
Proc. SPIE 6593, Photonic Materials, Devices, and Applications II, 659321 (12 June 2007); doi: 10.1117/12.721400
Show Author Affiliations
Daniel Navarro-Urrios, Nanoscience Lab., Univ. of Trento (Italy)
Mher Ghulinyan, Nanoscience Lab., Univ. of Trento (Italy)
Paolo Bettotti, Nanoscience Lab., Univ. of Trento (Italy)
Néstor Capuj, Univ. of La Laguna (Spain)
Claudio J. Oton, Univ. of Southampton (United Kingdom)
Fernando Lahoz, Univ. of La Laguna (Spain)
Inocencio R. Martin, Univ. of La Laguna (Spain)
Lorenzo Pavesi, Nanoscience Lab., Univ. of Trento (Italy)


Published in SPIE Proceedings Vol. 6593:
Photonic Materials, Devices, and Applications II
Ali Serpengüzel; Gonçal Badenes; Giancarlo C. Righini, Editor(s)

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