Ragdale, C.M., Payne, D.N., de Fornel, F. and Mears, R.J.
Single-mode fused biconical taper fibre coupler.
In, IEE Colloquium Conference in Optical Fibre Sensors 221, London, GB,
26 - 28 Apr 1983.
In many single-mode optical fibre sensors, in particular those based on fibre interferometers, a single-mode 4-port directional coupler is needed to transfer light from one fibre to another. Although the coupling can be achieved with discrete components, a more stable and robust system with a lower insertion loss can be obtained if a fibre coupler is used
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