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. 21, 1999
Filed:
Dec. 31, 1997
Andrew N Robinson, Plano, TX (US);
Scott A Welch, Allen, TX (US);
MCI Communications Corporation, Washington, DC (US);
Abstract
The present invention provides an improved terrestrial optical fiber communications network link including an increased number of amplification sites spaced at intervals along the link in series with shorter optical fiber spans. One embodiment of the invention includes an improved long-haul terrestrial optical fiber link having low-power line optical amplifiers (LPLAs) at the amplification sites connected together by optical fiber spans. In other embodiments of the present invention, some or all of the LPLAs have integrated dispersion compensation modules (DCMs). Another embodiment of the improved optical fiber link system uses proper adjustment and spacing of LPLA amplifiers (e.g., spaced between 30-60 km long fiber spans) to eliminate the need for lightwave regenerators (LREs) even along very long (e.g., 300-2500 km long or even longer) links. The long-haul optical link is transparent to wavelength or combination of wavelengths in the erbium band, and any combination of modulations applied to those wavelengths. The long-haul terrestrial optical fiber link of the present invention has several differences from the traditional optical fiber links. Low-power line amplifiers (LPLAs) of the present invention differ in several ways from bi-directional line amplifiers (BDLAs). The low-power line amplifiers of the present invention also differ from submarine amplifiers.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile