Title :
In-line optical-fibre filter for wavelength multiplexing
Author :
Whalen, M.S. ; Walker, Katherine L.
Author_Institution :
AT&T Bell Laboratories, Crawford Hill Laboratory, Holmdel, USA
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 ¿m, and has a peak coupling efficiency of 60% with an excess loss of 0.2 dB.
Keywords :
band-pass filters; directional couplers; frequency division multiplexing; optical communication equipment; optical couplers; optical fibres; optical filters; bandpass filter; core radii; evanescent-wave coupling; excess loss 0.2 dB; nonperiodic filter response; optical fibre wavelength-selective directional coupler; optical-fibre filter; peak coupling efficiency; refractive-index profiles; wavelength multiplexing;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850511
