Abstract
The coherent combination of separate laser beams into a single beam offers an attractive route to power scaling of ultra-high intensity lasers because it offers the advantage that it reduces the requirements for laser amplifiers to a more modest level. The coherent combination of laser beams can be achieved through spectral or amplitude addition. The coherent combination of free space lasers has been demonstrated in the CW and nanosecond pulsed regimes [1-2]. A proof-of-principle experiment conducted on the Astra-Gemini laser facility [3] was performed [4] to investigate the visibility to extend that technique to femtosecond pulses at high power.
© 2015 IEEE
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