Influence of the Laser Detuning and Optical Filter Cascading in WDM Networks.pdf

Influence of the Laser Detuning and Optical Filter Cascading in WDM Networks Mário J. N. Lima, António L. J. Teixeira, J. Ferreira da Rocha Instituto de Telecomunicações and Dep. de Electrónica e Telecomunicações, Universidade de Aveiro, Aveiro, Portugal Abstract neff neff The laser wavelength dependence on the temperature, polarization current, aging, can represent a problem in neff (a) (b) (c) optical networks where multiple multiplexing and Fig. 1 Refractive index perturbations along the grating demultiplexing operations occur. These demultiplexing considering Gaussian apodization. (a) Positive-only; operations are commonly performed using fiber Bragg (b) Negative-only; (c) Zero-dc. gratings, due to their versatility and unique filtering 1 ) capabilities.