10 Gbit/s Optical Transmisson beyond Dispersion Limit

Abstract

SummaryMethods that enable 10 Gbit/s optical transmission beyond the dispersion limit imposed by traditional system solutions are presented and evaluated. Each solution is evaluated using the criteria transmission distance, cost and technological maturity, compatibility with the present systems and upgradability.

Optical Dispersion Equalisation using a Double-Coupler Double-Ring Resonator

“…Recently there are great interests in transmission of optical information beyond the limit of dispersion [1] thus optical fiber communications systems have been developed towards much longer distance and faster bit rates. Naturally the maximum distance and the maximum bit rate of an optical fiber communications depend upon the loss and the group delay of the optical guided waves propagating in the optical fiber.…”

“…Optical dispersion equalisation can be performed using dispersion compensating fiber [1], spectral inversion devices [11] placed at the mid point of the repeaterless distance along the transmission length, electrical dispersion compensation [12] and optical resonators [13]. These techniques are different by the position of the equaliser in the system whether it is at the transmission end or receiving end or at the mid point between the transmitter and receiver.…”

“…The electric field at the fiber output for a monochromatic light source is given by [1,2]: Expressing (12) in terms of the system physical parameters, resulting: Moreover, the broadening of pulses depends on the value of D, hence the values of ßö and L. Without loss of generality, the source is assumed to be monochromatic in the following analysis, i. e. W s = 0.…”