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The authors demonstrate an electroabsorption modulator operating at 1.55 µm wavelength, which is integrated with passive waveguide gradually tapered spotsize transformers allowing a low loss coupling to cleaved flat optical fibres. The modulator has 10.1 dB total fibre to fibre insertion loss with 15 dB extinction ratio and 300 Å spectral range. The modulator polarisation sensitivity is lower than 0.5 dB.
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Koren et al. (1994) studied this question.
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