Title :
Performance degradation of multiwavelength optical networks due to laser and (de)multiplexer misalignments
Author :
Khrais, N.N. ; Elrefaie, A.F. ; Wagner, R.E. ; Ahmed, S.
Author_Institution :
Dept. of Electr. Eng., City Coll. of New York, NY, USA
Abstract :
In this letter, we use computer simulation techniques to evaluate the performance degradation for a multiwavelength optical network with a cascade of 30 randomly misaligned (de)multiplexers. Two types of (de)multiplexers are used in the simulation and modeled as third-order and first-order Butterworth filters, both with a full width half maximum (FWHM) of 125 GHz. For WDM systems at 10 Gb/s per optical channel with 30 uniformly misaligned filters, laser misalignment tolerances (at 0.3 dB distortion-induced-eye-closure penalty) vary from /spl plusmn/30 GHz (/spl plusmn/0.24 nm) for systems using third-order Butterworth filters to /spl plusmn/20 GHz (/spl plusmn/16 mm) for systems using first-order filters.<>
Keywords :
Butterworth filters; demultiplexing; optical fibre networks; optical filters; simulation; wavelength division multiplexing; 10 Gbit/s; computer simulation technique; demultiplexer misalignments; distortion-induced-eye-closure penalty; first-order Butterworth filters; laser misalignment tolerances; laser misalignments; multiwavelength optical networks; optical channel; performance degradation; simulation; third-order Butterworth filters; uniformly misaligned filters; Computational modeling; Computer simulation; Degradation; Laser modes; Laser noise; Optical distortion; Optical fiber networks; Optical filters; Quantum cascade lasers; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
