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A semiconductor optical amplifier, a grating demultiplexer and a photodiode array were integrated in InGaAsP/InP to form a WDM receiver chip. 10 wavelength channels (TE or TM polarisation) in the 1.54 µm wavelength region with a channel spacing of 2 nm were detected with a crosstalk of less than –20 dB and a responsivity of up to 8 A/W.
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Cremer et al. (1994) studied this question.
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