Effectively nonreciprocal evanescent-wave optical-fibre directional coupler
1985; Institution of Engineering and Technology; Volume: 21; Issue: 5 Linguagem: Inglês
10.1049/el
ISSN1350-911X
Autores Tópico(s)Semiconductor Lasers and Optical Devices
ResumoAn effectively nonreciprocal directional coupler has been demonstrated using evanescent coupling between a single-mode and a multimode optical fibre. At least 17 dB difference in coupling efficiency between transmit and receive branches has been measured. The near-field mode patterns show coupling between the single-mode fibre and a few high-order modes of the multimode fibre.
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