Title :
Wide-bandwidth, sharp-cutoff bandpass filter for WDM transmission
Author :
Minowa, J. ; Fujii, Yuka
Author_Institution :
NTT Yokosuka Electrical Communication Laboratory, Yokosuka, Japan
Abstract :
A new interference bandpass filter for use in optical multi/demultiplexers is presented. This filter is a 37-layer, 5-cavity filter made of TiO2 and SiO2. The cavity layers are the 4th, 11th, 19th, 27th and 34th layers. A fabricated filter (centre wavelength at 1.3 ¿m) had a 77 nm bandwidth and a 0.64 dB/nm cutoff slope. The transmittance in the passband was 0.97 or greater.
Keywords :
band-pass filters; frequency division multiplexing; optical fibres; optical filters; optical links; 0.64 dB/nm cutoff slope; 37 layer filter; 77 nm bandwidth; SiO2; TiO2; WDM transmission; interference bandpass filter; optical communications; optical fibre links; optical filters; optical multiplexing; sharp-cutoff bandpass filter; transmittance; wavelength 1.3 micron; wavelength division multiplexing;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850646
