Abstract
A 1.5μm GaInAsP travelling-wave amplifier (TWA), which has a residual facet reflectivity of 0.04% is realised through the application of SiOx antireflection coatings on both facets. The TWA has wide signal gain spectra with undulation of 1.5dB within one free spectral range for a 24.5dB signal gain. The saturation output power of the 24.5dB signal gain. The saturation output power of the TWA fora 20dB signal gain is +7dBm, which is 20dB greater than that provided by the Fabry-Perot amplifier.
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