Method and apparatus to generate and monitor optical signals...

Details Method and apparatus to generate and monitor optical signals... Method and apparatus to generate and monitor optical signals...

2006-08-29

2006-08-29

Menefee, James (Department: 2828)

Coherent light generators

Particular beam control device

Optical output stabilization

C372S032000, C372S050110, C372S050120, C372S050210

Reexamination Certificate

active

07099360

ABSTRACT:
An optical transmitter includes an external cavity laser array formed in a PLC, a trench-based detector array and an AWG. The external cavity laser is formed using an array of substantially similar laser gain blocks and an array of gratings formed in waveguides connected to the gain blocks. Each grating defines the output wavelength for its corresponding external cavity laser. Each detector of the detector array includes a coupler to cause a portion of a corresponding laser output signal of the laser array to propagate through a first sidewall of a trench and reflect off a second sidewall of the trench to a photodetector. In one embodiment, the photodetector outputs a signal indicative of the power level of the reflected signal, which a controller uses to control the laser array to equalize the power of the laser output signals.

REFERENCES:
patent: 6192170 (2001-02-01), Komatsu
patent: 6320888 (2001-11-01), Tanaka et al.
patent: 2003/0223672 (2003-12-01), Joyner et al.
patent: 2005/0018951 (2005-01-01), Mossberg et al.
Sasaki, T. et al.; “Multi-Channel Power Level Monitor with Upward-Reflector and Sensor-Array Integrated in Planar Lightwave Circuit”, 2000 Optical Society of America.

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