Coherent light generators – Particular beam control device – Optical output stabilization
Reexamination Certificate
2005-03-22
2005-03-22
Harvey, Minsun O. (Department: 2828)
Coherent light generators
Particular beam control device
Optical output stabilization
C372S029015, C372S025000, C372S038100
Reexamination Certificate
active
06870864
ABSTRACT:
An optical margin testing system is provided for automatic power control loops. An optical circuit includes a laser diode and a monitor diode coupled to the automatic power control loop. A bias generator circuit generates a control signal. The control signal is applied to the automatic power control loop. The control signal enables an operation point of the laser diode to both increase and decrease by a set percentage value for optical margin testing. The bias generator circuit includes a tri-state receiver. An input signal is applied to the tri-state receiver for selecting one of a normal operational mode, an increased set percentage value operational mode, and a decreased set percentage value operational mode. A current mirror is coupled to the tri-state receiver provides the control signal that is applied to the automatic power control loop.
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Harvey Minsun O.
Nguyen Dung T.
Pennington Joan
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