Abstract
A waveguide amplifier with a large core was fabricated by the vapour transport method, which allows the dense dispersion of DCM into the PMMA plate inhibiting its aggregation. The cladding layer of the amplifier was formed by the dispersal of organofluorine compounds with a low refractive index. Amplification of the signal beam at 650 nm was observed upon top pumping with a pulsed laser at 488 nm. The gain of the amplifier was 3.76 dB cm−1 at the maximum and was one order of magnitude greater than that of a fibre optical amplifier.
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