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Characterizing the prepulse temporal contrast of optical pulses is required to understand their interaction with matter. Light with relatively low intensity can interact with the target before the main high-intensity pulse. Estimating the intensity contrast, instead of the spatially averaged power contrast, is important to understand intensity-dependent laser–matter interactions. A direct optical...
The focal spot of the incoherent pedestal preceding a high-energy laser pulse is predicted using the coherence properties of imaging systems, determining the on-shot intensity contrast of kilojoule laser pulses from OMEGA EP.
The OMEGA EP intensity contrast has been measured to be approximately 6 decades for kilojoule 10-ps pulses. The OPCPA front end is the primary source of the measured incoherent pedestal.
Two main applications are foreseen in the future communication environment for optical coherent transmission systems: long-haul high-capacity links and multichannel FDM systems. The technological developments in high-power, narrow-linewidth, single-mode semiconductor lasers and wide-band high-sensitivity coherent receivers lead to systems in which the main limitation to the maximum link length is...
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