An optical multichannel controller that gives full access to 12 individual wavelength channels is reported. The device consists of two waveguide grating routers integrated with semiconductor optical amplifiers. It exhibits a channel spacing of exactly 3.2nm (400 GHz) and an off-peak signal rejection of more than –40 dB. The amplifiers compensate for the multiplexer insertion losses.
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Zirngibl et al. (1994) studied this question.
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