The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 2002
Filed:
Jan. 11, 2001
Ganesh K. Gopalakrishnan, Bethesda, MD (US);
Codeon Corporation, Columbia, MD (US);
Abstract
An optical modulation system for externally modulating two independent optical signals with first, second, third and fourth electrical input signals with two modulators. The system includes a first modulator with a first electrode receiving the first electrical input signal, a second electrode receiving the second electrical input signal, a first optical signal path co-propagating the first optical input signal with the first electrical signal and counter-propagating the second optical input signal to generate a first modulated optical signal, and a second optical signal path co-propagating the second optical input signal with the second electrical input signal and counter-propagating the first optical input signal to generate a second modulated optical signal. The second modulator includes a third electrode receiving the third electrical input signal, a fourth electrode receiving the fourth electrical input signal, a third optical signal path co-propagating the first optical input signal with the third electrical input signal and counter-propagating the second optical input signal to generate a third modulated optical signal, and a fourth optical signal path co-propagating the second optical input signal with the fourth electrical input signal and counter-propagating the first optical input signal to generate a fourth modulated optical signal.