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5 August 2015 Progress of diagnostics for coherent beam combination on ultrashort pulse
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Proceedings Volume 9621, 2015 International Conference on Optical Instruments and Technology: Advanced Lasers and Applications; 962106 (2015) https://doi.org/10.1117/12.2189707
Event: International Conference on Optical Instruments and Technology 2015, 2015, Beijing, China
Abstract
Ultrashort pulse is important to exploring laser acceleration in many areas, such as fast ignition, advanced radiography capability. Petawatt laser should not only improve output energy on a single beam, but also combine multi-beams coherently. Diagnostics of temporal and phase synchronization is developed for coherent beam combination on a 10ps laser pulse. When two pulses are guided into the diagnostics, one goes through a temporal delay unit and a lens with a focal length 500mm, then arrives at detector unit, the other goes through a phase delay unit and the same lens, and then arrives at detector unit, too. First, temporal synchronization is adjusted by temporal delay unit and monitored by a cross-correlation generator in the detector unit. Second, phase synchronization is adjusted by phase delay unit and monitored by a far field interferogram in the detector unit. In our design, temporal resolution is 6.7fs in temporal synchronization, and phase resolution is 0.007π in phase synchronization. Experiment has proved that this diagnostics is useful to realize synchronization between two ultrashort pulses both in temporal and in spatial.
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Xiaoping Ouyang, Yang Wang, Baoqiang Zhu, Jian Zhu, and Jianqiang Zhu "Progress of diagnostics for coherent beam combination on ultrashort pulse", Proc. SPIE 9621, 2015 International Conference on Optical Instruments and Technology: Advanced Lasers and Applications, 962106 (5 August 2015); https://doi.org/10.1117/12.2189707
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