System for regulating optical output power

Optical communications – Diagnostic testing – Determination of communication parameter

Reexamination Certificate

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C398S120000, C398S123000, C398S137000, C398S162000, C398S195000, C398S206000, C398S209000, C398S213000, C372S038010, C372S029020, C372S029010, C372S029011

Reexamination Certificate

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10337617

ABSTRACT:
Systems and methods for regulating optical power are described. A system for regulating optical power includes a laser driver circuit that receives an enable/disable signal and a data modulator input. The enable/disable signal regulates asynchronous mode operation. The system also includes a laser module including a laser diode emitter and a photodiode detector. The laser module is coupled to the laser driver circuit and receives a laser bias current from the laser driver circuit. The system also includes a switch coupled to the photodiode to receive a signal from the photodiode detector. The system also includes an automatic power control (APC) feedback circuit that receives a signal from the switch and provides a laser bias current feedback signal to the laser driver circuit to compensate for power output changes in the laser diode emitter over time.

REFERENCES:
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patent: 6219165 (2001-04-01), Ota et al.
patent: 2002/0027690 (2002-03-01), Bartur et al.
patent: 2002/0093999 (2002-07-01), Tanaka
patent: 2002/0114365 (2002-08-01), Gilliland et al.
Mechatronics, Electronic control system in mechanical and electrical engineering, 2nd edition, by W. Bolton, Prentice Hall, 1999, p. 291.
Maxim High-Frequency/Fiber Communications Group, Modification of the MAX3867 for Burst-Mode Applications, Jun. 8, 2001, pp. 1-4.
Maxim Integrated Products, MAXIM +3.3V, 2.5Gbps SDH/SONET Laser Driver with Automatic Power Control, Sep. 1998, pp. 1-12.
Maxim High-Frequency/Fiber Communications Group, Modifications of the MAX3867 for Burst-Mode Applications, Aug. 2, 2001, pp. 1-5.
Maxim Integrated Products, MAXIM MAX3867 Evaluation Kit, Jun. 2000, pp. 1-12.

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