High traffic and high capacity communications are believed to become cost-effective with the use of all-optical networks based on OFDM (optical frequency division multiplexing). In such networks, new strategies for OA and M (operation, administration and maintenance) functions need to be developed so as to suit the introduction of a new optical layer where in wavelength routing is exploited and faults are detected in a transparent manner. In this paper, we propose a scheme to monitor optical channels in the optical layer for supporting OA and M functions of a transparent and scalable photonic network.
Amrani, A.; Roldan, J.; Zhang, Y.; Prat, J.; Rafel, A.; Aventin, A.; Junyent, G. Proceedings of SPIE, the International Society for Optical Engineering Vol. 3230, p. 323-328 DOI: 10.1117/12.290392 Data de publicació: 1997-11 Article en revista
This paper concers the design and present results of a CPFSK optical receiver for a 2.5 Gbit/s coherent system operating at 1.55 ¡.¡m. The received CPFSK modulated signal is converted into the electrical domain by means of optical mixing at photodetection. This is implemented by a balanced configuration in arder to obtain the optimum profit of the optical power, reducing the local oscillator intensity noise. Next, it is electrically amplified, demodulated and digitally regenerated.
A 2.5 Gbit/s MI-DD optical receiver is designed. In order to optimize it, we considerate the noise and the intersimbol interference; hence, a realizable filtre has been studied and developed. A noise parametrization of the preamplifier has been done.
In this work an adaptive method for the equalization of the laser FM response is proposed and analyzed, for the application in a optical coherent CPFSK 2.5Gbit/s communication system. Its main feature is its independence on the particular laser and system response.