Las competencias matemáticas a partir de una estrategia didáctica en un ambiente de geometría dinámica

Se presenta una experiencia desarrollada en el contexto de la asignatura Práctica Educativa II del profesorado en matemática de la Facultad de Ciencias Exactas y Naturales de la Universidad Nacional del La Pampa. Dicha asignatura tiene entre sus objetivos la adquisición de competencias para diseñar unidades didácticas sobre los distintos contenidos curriculares de Matemática. La experiencia está centrada en la resolución de problemas con uso de tecnología, vivenciada por los futuros profesores para su posterior planificación y transferencia al ciclo básico de la educación secundaria. En particular se trabajó en el diseño de una actividad para la enseñanza de conceptos geométricos usando tecnología, con una mirada reflexiva al modo de plantear relaciones entre álgebra y geometría

Transmission impairments due to four-wave mixing in the 1310 nm window

High speed optical transmission in the 1310 nm window might have a potential for ACCESS and METRO applications considering the restricted distances and the virtual absence of dispersion related system penalties. On the other hand Four-Wave Mixing (FWM) is expected to play a major role in WDM transmission. The effects of FWM has been evaluated in a four channel 10 Gbit/s WDM experiment with 100 GHz channel spacing over 100 km Standard Single Mode Fibre employing semiconductor optical amplifiers (SOA’s) as a booster, in-line and preamplifier. Successful suppression of FWM penalties was achieved by using an unequal spaced channel allocation scheme

89 km 10 Gbit/s 1310 nm repeaterless transmission experiments using direct laser modulation and two SL-MQW laser preamplifiers with low polarization sensitivity

\u3cp\u3eAn unrepeatered 89 km 1310 nm 10 Gbit/s transmission experiment has been carried out for the first time employing an SL-MQW DFB laser diode and a high sensitivity optical front end with 1310 nm strained layer MQW optical amplifiers, enabling a total power budget of 35.8 dB. A record receiver sensitivity of -30.3 dBm at 10 Gbit/s @1310 nm has been demonstrated.\u3c/p\u3

Modeling and performance analysis of WDM transmission links employing semiconductor optical amplifiers

We theoretically explored the system limits of various single- and multichannel transmission links employing semiconductor optical amplifiers (SOAs). For this purpose, we developed an accurate model to describe the amplifier dynamics in the moderate and low saturation regimes. Our simulation results revealed the delicate balance between the level of saturation, the signal-to-noise ratio and the amount of gain per amplifier required for optimum system performance. The modeling results have been confirmed by recent experimental work in this area

Towards 1 Tbit/s SOA based 1310 nm transmission for LAN/Data Center Applications

The growing data traffic in the local area networks (LAN) is driving development of the cost-effective transmission systems that can carry it cost-efficiently. In this paper we propose and demonstrate the 1310 nm dense-wavelength-division multiplexed and polarization multiplexed transmission system. The demonstrated n×2×40 Gbit/s transmission system is based exclusively on semiconductor components without any form of the chromatic dispersion compensation or error-correction. Results of the conducted experiments show the excellent error-free 8×2×40 Gbit/s all-semiconductor transmission over 25 km of standard single-mode fiber. The demonstrated transmission system can be utilized to realize ultra-high speed connections like the next generation 400 Gbit/s and 1 Tbit/s Ethernet

High optical label switching add-drop multiplexer nodes with nanoseconds latency for 5G metro/access networks

\u3cp\u3eWe present a novel optical add-drop multiplexer for next-generation metro/access networks by exploiting optical label switching technology. Experimental results of a ring network show nanoseconds add/drop operation including multicasting and power equalization of 50Gb/s data.\u3c/p\u3

1310nm high-capacity waveband switch node for flat optical data center networks

Waveband switching capability of 1310nm SOA-based scalable and flow-controlled optical switching node is assessed. Experimental results show nanoseconds operation of 64-port switch node at 100 Gb/s WDM (4×25Gb/s) with >14dB dynamic range and <1.8dB penalty

Next-generation TDM-PON based on multilevel differential modulation

In this letter, a next-generation time-division multiplexed passive optical network (TDM-PON) based on multilevel differential modulation formats is proposed. Multilevel modulation enables the efficient scaling of bit rates without resorting to very high-speed electronics and photonics, while differential detection simplifies the detection process. The 40 Gb/s downstream signal is implemented with Star 16 quadrature amplitude modulation, while two upstream channels are evaluated, a simple, asymmetrical 10 Gb/s on-off keying signal and a 30-Gb/s differential eight phase-shift keying signal. Experimental results show very good receiver sensitivities, indicating the proposed modulation format's suitability for future very high-speed TDM-PONs

The raman amplifier in low-complexity PolMux DWDM 1310 nm transmission

In this paper, we experimentally investigate the impact of the Raman amplifier on the transmission quality in the high capacity and low complexity polarization multiplexed and dense wavelength division multiplexed transmission system in the 1310 nm wavelength domain. We compare its performance with the same system utilizing the semiconductor optical amplifier. Conducted experiments show that in the presented 1310 nm 8×2×40 Gbit/s transmission system, with the transmission line consisting of 25 km standard single mode fibre, the Raman amplifier can be successfully applied and its utilization leads to the 4 dB improvement of the average channel sensitivity in comparison with the system with a semiconductor optical amplifie