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. 21, 2008
Filed:
Mar. 07, 2003
Jian Liu, Sunnyvale, CA (US);
Zheng Wang, San Jose, CA (US);
Yonglin Huang, Milpitas, CA (US);
Xuejun LU, Fremont, CA (US);
Jian Liu, Sunnyvale, CA (US);
Zheng Wang, San Jose, CA (US);
Yonglin Huang, Milpitas, CA (US);
Xuejun Lu, Fremont, CA (US);
Finisar Corporation, Sunnyvale, CA (US);
Abstract
An optical amplifier utilizes two or more doped fiber segments or portions to achieve a lower noise figure and a higher saturation power than would be possible using any one of the doped fiber segments. Each doped fiber portion may be considered to be a doped fiber optical amplifier, and has a different doping level than each of the other doped fiber portions. Each such doped fiber portion has distinct amplitude gain and noise characteristics relative to each of the other doped fiber potions. The two or more doped fiber portions are coupled to each other in series and most often in a predefined order based on their relative amplitude gain, noise and saturation power characteristics.