Title :
Polarising fibre coupler with high extinction ratio
Author :
Yokohama ; Okamoto, K. ; Kawachi, M. ; Noda, J.
Author_Institution :
NTT Ibaraki Electrical Communication Laboratory, Tokai, Japan
Abstract :
Fused polarising fibre couplers have been fabricated using single-polarisation single-mode fibres. When circularly polarised light is fed into the coupler, one of the two orthogonal polarisation modes suffers strong attenuation, and only one polarisation mode couples in the fused biconical taper region. The extinction ratio of the coupler is 41 dB at a wavelength ¿ = 1.3 ¿m with a coupling ratio of 48:52.
Keywords :
optical communication equipment; optical couplers; optical fibres; circularly polarised light; coupling ratio; extinction ratio; fused biconical taper region; optical communication equipment; orthogonal polarisation modes; polarising fibre couplers; single-polarisation single-mode fibres;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840683
