C. de Mello Gallep

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Semi-circadian rhythms of spontaneous photon emission from wheat seedlings germinated and grown in a constant environment (darkened chamber) were found to be synchronized with the rhythm of the local gravimetric (lunisolar) tidal acceleration. Time courses of the photon-count curves were also found to match the growth velocity profile of the seedlings.(More)
Measurements of spontaneous ultra-weak light (biophoton) emission from native Brazilian and German wheat seedlings in three simultaneous series of germination tests are presented, two run in Germany and one in Brazil. Seedlings in both countries presented semi-circadian rhythms of emission that were in accordance with the local lunisolar gravimetric tidal(More)
In order to corroborate the hypothesis that variations in the rate of spontaneous ultra-weak photon emission (UPE) from germinating seedlings are related to local variations of the lunisolar tidal force, a series of simultaneous tests was performed using the time courses of UPE collected from three plant species—corn, wheat and sunflower—and also from wheat(More)
The parameters of an encapsulated semiconductor optical amplifier (SOA) are obtained by a proper extraction algorithm using a technique based both on measurements and modeling. The theoretical model is based on rate equations and the experiments use continuous wave optical gain curves measured for different injected currents and optical input powers. The(More)
Simulations of ultra-long (10 mm) semiconductor optical amplifier's induced optical chirp (cross-phase modulation), with posterior conversion to amplitude modulation by proper filtering, show promising results for wavelength conversion with pulse re-amplifying and reshaping in 10 Gbps and 20 Gbps. The dependences on filter bandwidth and optical input power(More)
– Simulation results for the implementation of a high speed optical switch is presented. The optical switch uses a semiconductor optical amplifier with a pre-impulse-step injected current as the switching signal. The optical semiconductor amplifier may achieve less than 50 pico seconds off-on switching times. The simulated results have been partially(More)
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