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
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.
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.
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.
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.