Quad 14Gbps L-Band VCSEL-based System for WDM Migration of 4-lanes 56 Gbps Optical Data Links

We report on migrating multiple-lane link into an L-band VCSEL-based WDM system. Experimental validation achieves successful transmission over 10 km of SMF at 4x14Gbps. Inter-channel crosstalk penalty is observed to be less than 0.5 dB and a transmission penalty around 1 dB. The power budget margin ranges within 6 dB and 7 dB

All-VCSEL based digital coherent detection link for multi Gbit/s WDM passive optical networks

We report on experimental demonstration of a digital coherent detection link fully based on vertical cavity surface emitting lasers (VCSELs) for the transmitter as well as for the local oscillator light source at the receiver side. We demonstrate operation at 5 Gbps at a 1550 nm wavelength with record receiver sensitivity of -36 dBm after transmission over 40 km standard single mode fiber. Digital signal processing compensates for frequency offset between the transmitter and the local oscillator VCSELs, and for chromatic dispersion. This system allows for uncooled VCSEL operation and fully passive fiber transmission with no use of optical amplification or optical dispersion compensation. The proposed system demonstrates the potential of multi-gigabit coherent passive optical networks with extended reach and increased capacity. Moreover, this is, to the best of our knowledge, the first demonstration of coherent optical transmission systems using a low-cost VCSEL as the local oscillator as well as for the transmitter

Estudio experimental del problema 2 + p−COL aleatorio

El problema 2 + p−COL aleatorio interpola suavemente desde el problema polinomial 2−COL aleatorio al problema NP-Completo 3−COL aleatorio. En este artículo se presenta un extenso estudio experimental del comportamiento de la transición de fase y el costo computacional de este problema. Se introdujo un nuevo parámetro para el estudio experimental de la transición de fase. Los resultados para el n de la transición de fase se ajustan a los valores obtenidos teóricamente por otros autores. El estudio del costo computacional, realizado en la frontera de la fase, mostró un escalamiento polinomial para p 0,7 y exponencial para p 0,8