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. 18, 1992
Filed:
Aug. 12, 1991
Akira Hasegawa, New Providence, NJ (US);
Yuji Kodama, Worthington, OH (US);
Dietrich Marcuse, Lincroft, NJ (US);
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
In soliton optical fiber communication systems that comprise a multiplicity of spaced-apart intermediate non-electronic amplifiers, pulse arrival time jitter can be substantially reduced by incorporation into the transmission path of spaced-apart bandwidth-limiting elements. Exemplarily, the bandwidth-limiting elements are optical filters of bandwidth B.sub.f, with a filter associated with each intermediate amplifier, and with B.sub.f chosen to fall within the range B.sub.sol (N.sub.f /3).sup.1/2, where B.sub.sol is the FWHM spectral width of the soliton pulses, and N.sub.f is the number of intermediate filters in the system. More generally, the bandwidth-limiting elements are selected such that >.delta.t.sup.2 >, the variance of the jitter, is at most 90% of the variance associated with an, otherwise identical, comparison system that does not contain the bandwidth-limiting elements. Systems according to the invention thus can overcome the Gordon-Haus limit on the bit rate/distance product.