Optical Soliton Transmission Research Articles

2.8 Gbit/s optical soliton transmission employing all laser diodes

2.8 Gbit/s optical soliton transmission is successfully demonstrated using a gain-switched 1.55 μm distributed feedback laser diode and a Ti : LiNbO3 intensity modulator. An Er3+-doped fibre amplifier and a Raman amplifier, both pumped by 1.47 μm laser diodes, are employed to achieve intense optical pulses and fibre-loss compensation, respectively.

20 Gbit/s soliton transmission over 200 km using erbium-doped fibre repeaters

A 20 Gbit/s optical soliton transmission over 200 km has been successfully achieved for the first time by using multiple erbium-doped fibre repeaters. The erbium-doped amplifiers are used as lumped amplifiers. The repeater spacing is 25 km and the soliton pulse width is 20 ps. The erbium-doped fibre amplifiers are pumped by InGaAsP laser diodes.

Numerical study of optical soliton transmission amplified periodically by the stimulated Raman process

Stability of optical solitons amplified periodically by the stimulated Raman process in a fiber is numerically studied for various ranges of parameters. A stable transmission of ≳10-G bit soliton train can be achieved by a careful choice of parameters with reasonably large amplifier spacings (≃30 km) and small soliton and pump powers (≃30 mW).