Title :
Low-loss 8Ã\x978 single-mode star coupler
Author_Institution :
British Telecom Research Laboratories, Ipswich, UK
Abstract :
The fabrication and performance of a stable single-mode transmissive 8×8 star coupler is described. The device exhibits very low excess loss (0.13 dB), good coupling uniformity (0.73 dB) and low near-end crosstalk (>64 dB). The star coupler is fabricated from eight lengths of single-mode fibre, by forming 3 dB fused coupling regions between appropriate fibre pairs. A Table of insertion loss measurements is presented, together with graphs showing the wavelength response between 1.2 and 1.7 ¿m.
Keywords :
optical couplers; optical fibres; 3 dB fused coupling regions; 8Ã\x978 single-mode star coupler; coupling uniformity; eight lengths of single-mode fibre; fabrication; graphs; insertion loss measurements; low excess loss; low near-end crosstalk; performance; wavelength range 1.2 to 1.7 micron; wavelength response;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850356
