ABSTRACT
Over the past few years there has been a growing interest in the use of
optical fibres for information distribution systems and sensors.
Consequently the fabrication of multiport fibre devices to divide or
combine transmission signals, called power couplers, has been
developed. Fibre couplers are the most important devices in fibre
applications such as high-speed data link systems, wavelength
demultiplexer-multiplexer systems, coherent transmission systems,
fibre sensors and fibre optics measurement systems.
