Abstract
Simultaneous monitoring of channel wavelengths is important in wavelength division multiplexing (WDM) systems owing to the wavelength drift of distributed feedback (DFB) lasers.1,2 For this purpose, a simple method was proposed using the crossover transmission property of the arrayed-waveguide grating (AWG).3 Each channel wavelength is measured from the output power ratio of two adjacent AWG outputs in dB scale.
© 2002 Optical Society of America
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