Tunable optical add/drop multiplexer with multi-function...

Optical waveguides – Integrated optical circuit

Reexamination Certificate

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C385S010000, C385S016000

Reexamination Certificate

active

06888973

ABSTRACT:
A photonic circuit includes a tunable drop filter arrangement that includes a plurality of resonators. The drop filter arrangement is tuned to remove a selected frequency from an input data stream from a waveguide. A wavelength sensor coupled to the drop filter to monitor the selected frequency to which the drop filter arrangement has been tuned. A tunable laser presents a new signal of a defined frequency indicative of a signal to be added to the input data stream. A modulator coupled to the tunable laser for receiving the new signal and forming a modulated signal. An add filter arrangement coupled to the modulator for receiving the modulated signal and adding the modulated signal to the data stream.

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“Integrated Real Time Multi-channel wavelength monitoring circuit using phased-array waveguide grating,” Zhong et al.Optical Fiber Communication Conference and the International Conference on Integrated Optics and Optical Fiber Communications. Feb., 1999. San Diego, CA.

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