Fiber optic tunable add-drop multiplexer/demultiplexer

Details Fiber optic tunable add-drop multiplexer/demultiplexer Fiber optic tunable add-drop multiplexer/demultiplexer

2006-10-24

2006-10-24

Payne, David C. (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S083000, C398S085000

Reexamination Certificate

active

07127169

ABSTRACT:
Techniques for calibrating tunable optical devices using a probing signal as a reference so as to achieve an accurate control over an absolute wavelength of the tunable optical devices. A probing signal being a calibrated optical signal with a spectrum centered at a desired add/drop channel or wavelength is introduced into an N-port circulator coupled between two tunable optical devices. When the two tunable optical devices are tuned not exactly at the desired wavelength, a portion of probing signal will be reflected or dropped out by the two tunable optical devices. The dropped probing signal is detected and coupled to a signal processor or circuitry configured to generate adjustments to or the control signals for controlling the tunable optical devices in accordance with the reflected probing signal being maximized.

REFERENCES:
patent: 5982518 (1999-11-01), Mizrahi
patent: 5982791 (1999-11-01), Sorin et al.
patent: 6122096 (2000-09-01), Fatehi
patent: 6594410 (2003-07-01), Kersey et al.
patent: 6728445 (2004-04-01), Blomquist et al.
patent: 6738543 (2004-05-01), Beeson et al.
patent: 6751375 (2004-06-01), Meyer
patent: 6795610 (2004-09-01), Meyer

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