초록 ▼

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 bandwid

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 Bf, with a filter associated with each intermediate amplifier, and with Bf chosen to fall within the range Bsol(Nf/3)½, where Bsol is the FWHM spectral width of the soliton pulses, and Nf is the number of intermediate filters in the system. More generally, the bandwidth-limiting elements are selected such that >d2>, 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.

대표청구항 ▼

A first optical fiber communication system comprising a) means for generating optical pulses, associated with said pulses being a center frequency wo and a bandwidth Bsol; b) means responsive to the optical pulses, said responsive means being spaced apart from said generating means; c) a length L of

A first optical fiber communication system comprising a) means for generating optical pulses, associated with said pulses being a center frequency wo and a bandwidth Bsol; b) means responsive to the optical pulses, said responsive means being spaced apart from said generating means; c) a length L of transmission path pulse-transmissively connecting said generating means and said responsive means, said length of transmission path comprising single mode optical fiber and a multiplicity Namp of spaced-apart non-electronic amplifiers, the first communication system being adapted for operation as a soliton fiber communication system; CHARACTERIZED IN THAT d) the transmission path comprises a multiplicity Nf of spaced-apart bandwidth-limiting elements, associated with said elements being a nominal gain characteristic g(wwd2>) at the responsive means is at most 90% of d2>associated with a comparison optical fiber communication system which is identical to the first communication system except that the transmission path of the comparison system does not comprise said bandwidth-limiting elements.