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:
Sep. 26, 2006
Filed:
Mar. 10, 2003
Anderson Stevens Leonidas Gomes, Recife, BR;
Michael Lee Sundheimer, Recife-PE, BR;
Mariana Torres Carvalho, Camaragibe, BR;
Joaquim Ferreira Martins-filho, Recife, BR;
Carmelo José Albanez Bastos-filho, Recife, BR;
Walter Margulis, Huddinge, SE;
Anderson Stevens Leonidas Gomes, Recife, BR;
Michael Lee Sundheimer, Recife-PE, BR;
Mariana Torres Carvalho, Camaragibe, BR;
Joaquim Ferreira Martins-Filho, Recife, BR;
Carmelo José Albanez Bastos-Filho, Recife, BR;
Walter Margulis, Huddinge, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
An arrangement and method provide an optical thulium doped fiber amplifier utilizing a dual wavelength pumping scheme for amplifying an optical signal. The method includes the steps of: a first deposition (a) of energy into the fiber amplifier by pumping with radiation of a first wavelength; and a second deposition (b) of energy into the fiber amplifier by pumping with radiation of a second wavelength. The radiation of the first wavelength is arranged to induce, by single photon absorption, a population to theHlevel of the thulium dopant, and the radiation of the second wavelength primarily depopulates theFlevel, by excited absorption of a single photon, preferably by strong excited state absorption to theFlevel. The steps gives a population inversion between theHand theFlevels and facilitate a power efficient high gain amplification.