American Journal of Botany 78(6): 789-794. 1991. ALLOCATION OF REPRODUCTIVE RESOURCES WITHIN AND ... more American Journal of Botany 78(6): 789-794. 1991. ALLOCATION OF REPRODUCTIVE RESOURCES WITHIN AND AMONG INFLORESCENCES OF LAVANDULA STOECHAS (LAMIACEAE)1 Javier Herrera Departamento de Biologia Vegetal y Ecologia, Universidad de Sevilla, Apartado ...
The Information Society Technologies-all-optical LAbel SwApping employing optical logic Gates in ... more The Information Society Technologies-all-optical LAbel SwApping employing optical logic Gates in NEtwork nodes (IST-LASAGNE) project aims at designing and implementing the first, modular, scalable, and truly all-optical photonic router capable of operating at 40 Gb/s. The results of the first project year are presented in this paper, with emphasis on the implementation of network node functionalities employing optical logic gates and optical flip-flops, as well as the definition of the network architecture and migration scenarios. Index Terms-All-optical label swapping, all-optical logic gates, all-optical signal processing, Mach-Zehnder interferometer, optical flip-flops, optical packet switching, semiconductor optical amplifier, ultrafast nonlinear interferometer.
A two-bit all-optical correlator based on cascaded logic XOR gates is demonstrated with 10-Gb/s o... more A two-bit all-optical correlator based on cascaded logic XOR gates is demonstrated with 10-Gb/s optical labels. Error-free operation with 13-dB extinction-ratio performance is achieved after the second stage by adjusting the label signal input power. The signal degradation at the device output is mainly caused by the accumulated amplified spontaneous emission noise from each active Mach-Zehnder interferometer. The experimental results show the feasibility of this architecture to perform address-recognition functionalities in photonic routers.
A novel approach to reduce the dispersion-induced effects in microwave optical links based on the... more A novel approach to reduce the dispersion-induced effects in microwave optical links based on the interplay of intensity dependent phase modulation in semiconductor optical amplifiers (SOAs) and fiber chromatic dispersion has been proposed and experimentally demonstrated. The results show that the dispersion-induced radio-frequency carrier suppression ratio may be alleviated by more than 20 dB when the SOA is operated under saturation. Moreover, we have noticed that the SOA input power must be carefully controlled in order to avoid significant nonlinear distortion.
In this letter, we demonstrate that all-optical network subsystems, offering intelligence in the ... more In this letter, we demonstrate that all-optical network subsystems, offering intelligence in the optical layer, can be constructed by functional integration of integrated all-optical logic gates and flip-flops. In this context, we show 10-Gb/s all-optical 2-bit label address recognition by interconnecting two optical gates that perform XOR operation on incoming optical labels. We also demonstrate 40-Gb/s all-optical wavelength-switching through an optically controlled wavelength converter, consisting of an integrated flip-flop prototype device driven by an integrated optical gate. The system-level advantages of these all-optical subsystems combined with their realization with compact integrated devices, suggest that they are strong candidates for future packet/label switched optical networks.
Figura 1.14: El vector A es la suma vectorial de los tres vectores Axî, Ayĵ y Azk, a lo largo de ... more Figura 1.14: El vector A es la suma vectorial de los tres vectores Axî, Ayĵ y Azk, a lo largo de los ejes coordenados.
American Journal of Botany 78(6): 789-794. 1991. ALLOCATION OF REPRODUCTIVE RESOURCES WITHIN AND ... more American Journal of Botany 78(6): 789-794. 1991. ALLOCATION OF REPRODUCTIVE RESOURCES WITHIN AND AMONG INFLORESCENCES OF LAVANDULA STOECHAS (LAMIACEAE)1 Javier Herrera Departamento de Biologia Vegetal y Ecologia, Universidad de Sevilla, Apartado ...
The Information Society Technologies-all-optical LAbel SwApping employing optical logic Gates in ... more The Information Society Technologies-all-optical LAbel SwApping employing optical logic Gates in NEtwork nodes (IST-LASAGNE) project aims at designing and implementing the first, modular, scalable, and truly all-optical photonic router capable of operating at 40 Gb/s. The results of the first project year are presented in this paper, with emphasis on the implementation of network node functionalities employing optical logic gates and optical flip-flops, as well as the definition of the network architecture and migration scenarios. Index Terms-All-optical label swapping, all-optical logic gates, all-optical signal processing, Mach-Zehnder interferometer, optical flip-flops, optical packet switching, semiconductor optical amplifier, ultrafast nonlinear interferometer.
A two-bit all-optical correlator based on cascaded logic XOR gates is demonstrated with 10-Gb/s o... more A two-bit all-optical correlator based on cascaded logic XOR gates is demonstrated with 10-Gb/s optical labels. Error-free operation with 13-dB extinction-ratio performance is achieved after the second stage by adjusting the label signal input power. The signal degradation at the device output is mainly caused by the accumulated amplified spontaneous emission noise from each active Mach-Zehnder interferometer. The experimental results show the feasibility of this architecture to perform address-recognition functionalities in photonic routers.
A novel approach to reduce the dispersion-induced effects in microwave optical links based on the... more A novel approach to reduce the dispersion-induced effects in microwave optical links based on the interplay of intensity dependent phase modulation in semiconductor optical amplifiers (SOAs) and fiber chromatic dispersion has been proposed and experimentally demonstrated. The results show that the dispersion-induced radio-frequency carrier suppression ratio may be alleviated by more than 20 dB when the SOA is operated under saturation. Moreover, we have noticed that the SOA input power must be carefully controlled in order to avoid significant nonlinear distortion.
In this letter, we demonstrate that all-optical network subsystems, offering intelligence in the ... more In this letter, we demonstrate that all-optical network subsystems, offering intelligence in the optical layer, can be constructed by functional integration of integrated all-optical logic gates and flip-flops. In this context, we show 10-Gb/s all-optical 2-bit label address recognition by interconnecting two optical gates that perform XOR operation on incoming optical labels. We also demonstrate 40-Gb/s all-optical wavelength-switching through an optically controlled wavelength converter, consisting of an integrated flip-flop prototype device driven by an integrated optical gate. The system-level advantages of these all-optical subsystems combined with their realization with compact integrated devices, suggest that they are strong candidates for future packet/label switched optical networks.
Figura 1.14: El vector A es la suma vectorial de los tres vectores Axî, Ayĵ y Azk, a lo largo de ... more Figura 1.14: El vector A es la suma vectorial de los tres vectores Axî, Ayĵ y Azk, a lo largo de los ejes coordenados.
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