Abstract

Optical time domain multiplexed (OTDM) systems are expected to play an important role in increasing the aggregate fibre capacity in telecommunications networks beyond the levels attainable with electronic systems. Within these systems, one of the key elements is a flexible optical demultiplexer, and recently attention has been focused on the use of the Kerr effect in silica based fibres to produce optically controlled switching elements^1,2. However, whilst offering attractive functionality, the relatively low nonlinear coefficientin silica fibres leads to excessively long devices and consequent latency, timing and stability issues. It is also necessary to carefully select the fibre properties and signal wavelengths for these switches to achieve a desired function. Thus a compact sub millimetre device, offering similar overall levels of nonlinearity offers clear advantages.

© 1993 Optical Society of America