Nath & Associates
Real time wavelength monitoring circuit
 A real time multi-channel wavelength monitoring circuit for monitoring Waveguide Division Multiplexing communications networks (WDM) is disclosed. The monitoring circuit monitors the full wavelength of an input signal by providing center offset inputs into a Phased Array Waveguide Grating (PAWG). By providing center offset inputs to a PAWG the passband crossover point can be changed optimizing a different dynamic range and wavelength resolution. 
University of Maryland Baltimore County
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Yung Jui Haifeng Shan
Chen Li Zhong