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:
Oct. 25, 2005
Filed:
Dec. 23, 2002
David a Beal, Loveland, CO (US);
John Bernard Medberry, Windsor, CO (US);
Patricia S Miller, Berthoud, CO (US);
David A Beal, Loveland, CO (US);
John Bernard Medberry, Windsor, CO (US);
Patricia S Miller, Berthoud, CO (US);
Agilent Technologies, Inc., Palo Alto, CA (US);
Abstract
A method for measuring in-band crosstalk in an optical amplifier, such as a Raman amplifier, in which a modulated optical signal is generated using an input modulator. The modulated optical signal is passed through the optical amplifier to obtain a first output optical signal, the power level of which is measured when the input modulator is in its off-state. The modulated optical signal is then attenuated by a factor equal to the extinction ratio of the input modulator to obtain an attenuated modulated optical signal which is passed through the optical amplifier to obtain a second output optical signal. The power level of the second output optical signal is measured when the input modulator is in its on-state. The in-band crosstalk is calculated by subtracting the power level of the second output optical signal from the power level of the first output optical signal.