Title :
Polarisation characteristics of fused-fibre coupler as quarter-wave device in 1.55μm-wavelength region
Author :
Namihira, Yoshinori ; Ryu, Sang-Burm ; Yamamoto, Seiichi ; Mochizuki, K.
Author_Institution :
KDD Research & Development Laboratories, Tokyo, Japan
Abstract :
Polarisation characteristics of the fused-taper-twisted single-mode-fibre coupler as a quarter-wave device are reported for the first time. In the case that circular polarisation is launched into the input port of the fused-fibre coupler, linear polarisation was observed at two output ports of the coupler, and an extinction ratio of about 30dB was obtained.
Keywords :
light polarisation; optical couplers; optical fibres; 1.55 micron; circular polarisation; extinction ratio; fused-fibre coupler; linear polarisation; quarter-wave device; single-mode-fibre coupler;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19860841
