Illuminated and non-illuminated photodiodes for monitoring...

Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems

Reexamination Certificate

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C250S2140RC

Reexamination Certificate

active

07045752

ABSTRACT:
Embodiments of the present invention utilize two photodiodes on the same substrate, one illuminated monitor photodiode to monitor an optical beam out of a back facet (or back scattered) of a laser, and one non-illuminated reference photodiode to characterize in real time radio frequency (RF) parameters/performance to control extinction ratio and optical modulation amplitude of the laser beam.

REFERENCES:
patent: 5371360 (1994-12-01), Bardos et al.

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