H. Li et al., FULL COVERAGE MULTICHANNEL WAVELENGTH MONITORING CIRCUIT USING CENTER-OFFSET PHASED-ARRAY WAVE-GUIDE GRATING, Electronics Letters, 34(22), 1998, pp. 2149-2151
An integrated multichannel optical wavelength monitoring circuit for w
avelength division multiplexing communication systems is presented. Fu
ll wavelength coverage of the working range without any blind spot is
realised by a centre-offset phased-array waveguide grating design. The
monitor exhibits a wavelength resolution of 0.02nm/dB (200GHz channel
spacing).