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:
Aug. 22, 1995
Filed:
Mar. 24, 1994
Alcatel CIT, Paris, FR;
Abstract
A device for assessing the transmission quality of an optical amplifier includes a coupler for sampling on the upstream side of the amplifier equipment relative to the direction of propagation of the optical signal to be amplified by the amplifier equipment part of the power of an optical signal propagating in the direction opposite to the propagation direction and corresponding to that part of the noise generated by the amplifier equipment transmitted in the direction opposite to the propagation direction. It also includes a coupler for sampling on the downstream side of the amplifier equipment relative to the propagation direction part of the power of an optical signal propagating in the propagation direction and corresponding to the optical signal after amplification by the amplifier equipment superimposed on that part of the noise generated by the amplifier equipment and transmitted in the propagation direction. It assesses the signal-to-noise ratio of the amplifier equipment from the optical powers sampled as above.