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Type: Artigo de evento
Title: Optical Ppm Generator By Direct-frequency Shifting
Author: Mazzali C.
Fragnito H.L.
Abstract: A modulator-less scheme of pulse position modulation (PPM) which converts a digital FM signal applied directly on the laser source to a PPM signal with a natural synchronization pulse is proposed. The laser source is directly modulated at a center frequency of 2.33 GHz. The reflected pulses provide a synchronization signal at the output of the fiber coupler, while the transmitted ones represent time-shifted replicas. The key point of this loop device is that the small variation in the period of the 2.33 GHz carrier when it is frequency-shifted by few kHz is multiplied by the number of pulsed inside the loop, producing a long decay (50-200 ps) between synchronization and replicated pulses.
Editor: IEEE, Piscataway, NJ, United States
Rights: fechado
Identifier DOI: 
Date Issue: 1998
Appears in Collections:Unicamp - Artigos e Outros Documentos

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