Evanescent‐field amplification in Nd3+‐doped fluoride planar waveguide

作者： T. Ohtsuki , S. Honkanen , N. Peyghambarian , M. Takahashi , Y. Kawamoto

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摘要: Planar channel waveguides of rare‐earth doped fluoride glass are demonstrated with single mode excitation and propagation losses below 3 dB/cm. The waveguide core was fabricated by Ag+–Na+ molten salt ion exchange process in a borosilicate (BGG31), Nd3+‐doped ZBLAN used as cladding. A 0.45 dB signal amplification at 1.064 μm observed the 1 cm long waveguide, 0.9 is expected emission peak (1.049 μm). Modeling results show 2.5 dB/cm potential gain improvement surface flatness glass.