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|Type:||Artigo de evento|
|Title:||Optical Ppm Generator By Direct-frequency Shifting|
|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|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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