Abstract
A scheme for gigabit range modulation without wavelength chirping is proposed. This technique uses the direct phase modulation property of a laser diode, and an optical interferometer with a time delay path. In a 4Gb/s experiment using a distributed feedback (DFB) laser diode with 1.54μm wavelength, the pulses passed through a 102 km nondispersionshifted fibre without being broadened.
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