Title :
Performance degradations of WDM systems due to laser and optical filter misalignments
Author :
Khrais, N.N. ; Elrefaie, A.F. ; Wagner, R.E.
Author_Institution :
Dept. of Electr. Eng., City Univ. of New York, NY, USA
fDate :
7/6/1995 12:00:00 AM
Abstract :
Laser and optical filter misalignment tolerances for WDM systems with two optical filters are almost the same at 2.5 Gbit/s and 10 Gbit/s per optical channel. For the three types of optical filters used. Multilayer dielectric film optical filters have the highest misalignment tolerances. Grating-based optical filters have lower tolerances, and multiple-path interferometer optical filters have the lowest tolerances. Using two grating-based optical filters, laser misalignments of about ±30 GHz for 25 GHz filter misalignments produce 1 dB system excess loss
Keywords :
diffraction gratings; measurement errors; optical communication equipment; optical fibre communication; optical fibre filters; optical fibre losses; wavelength division multiplexing; 1 dB; 10 Gbit/s; 2.5 Gbit/s; 25 GHz; WDM systems; grating-based optical filters; laser misalignments; misalignment tolerances; multilayer dielectric film optical filters; multiple-path interferometer optical filters; optical channel; optical filter misalignments; performance degradations; system excess loss;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19950702
