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:
Jun. 26, 2001
Filed:
Dec. 21, 1999
Applicant:
Inventor:
Henry A. Blauvelt, San Marino, CA (US);
Assignee:
Ortel Corporation, Alhambra, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 1/004 ;
U.S. Cl.
CPC ...
H04B 1/004 ;
Abstract
Nonlinear optical effects, such as stimulated Brillouin scattering, limit the power density of an optical signal that can be launched into an optical fiber. The SBS threshold is increased by a triple frequency modulation scheme, wherein an optical source is modulated by a low frequency sinusoid, e.g., 10-100 kHz, as well as an amplitude modulated high frequency signal, e.g. 6 GHz. In addition, the optical beam is externally phase modulated at a frequency which is not less than twice the frequency of the highest signal frequency being transmitted by the fiber, e.g. 2 GHz for a CATV transmission.