Experimental results of a demultiplexer using an aberration corrected concave grating for an optical system are described. The demultiplexer has 10 channels and a wavelength spacing of 20 mm from 0.7 to 0.9 μm wavelengths. Insertion losses and crosstalk were less than 2.5 dB and -30 dB, respectively, for all channels.
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Watanabe et al. (1980) studied this question.