Performance degradations of WDM systemsdue to laser and optical filter misalignments
- 6 July 1995
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 31 (14) , 1179-1180
- https://doi.org/10.1049/el:19950702
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
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