Coherent light generators – Particular beam control device – Having particular beam control circuit component
Reexamination Certificate
2006-09-21
2009-11-17
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular beam control device
Having particular beam control circuit component
C372S029010, C372S029020, C372S032000, C372S030000
Reexamination Certificate
active
07620081
ABSTRACT:
A system for real-time linewidth reduction in an optical source includes a laser device comprising a back facet, wherein the laser device receives a modulated input current and generates an optical output signal; an etalon device disposed adjacent to the back facet of the laser device, wherein the etalon device receives an optical feedback output signal from the back facet of the laser device, and wherein the etalon device monitors the optical feedback output signal for changes in frequency and, if they exist, generates an optical correction output signal; a photo-detector device disposed adjacent to the etalon device, wherein the photo-detector device receives the optical feedback and correction output signals, and wherein the photo-detector device converts the optical feedback and correction output signals into an electrical signal; and a feedback correction loop coupled to the photo-detector device, wherein the feedback correction loop receives the electrical signal from the photo-detector device and generates a substantially linear feedback current. The input current is modified by the substantially linear feedback current to form the modulated input current.
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Bernard Christopher L.
Brown Tyler S.
Ciena Corporation
Clements Bernard PLLC
Harvey Minsun
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