In-line optical-fibre filter for wavelength multiplexing
- 15 August 1985
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 21 (17) , 724-725
- https://doi.org/10.1049/el:19850511
Abstract
An optical-fibre wavelength-selective directional coupler has been fabricated using evanescent-wave coupling between fibres of dissimilar core radii and refractive-index profiles. This device has a nonperiodic filter response with a bandpass of 90 nm FWHM centred around 1.22 μm, and has a peak coupling efficiency of 60% with an excess loss of 0.2 dB.Keywords
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