Deep-ultraviolet picosecond flat-top pulses by chirp-matched sum frequency generation

Author
Vicario, Carlo
Trisorio, Alexandre
Arisholm, Gunnar
Hauri, Christoph P.
Date Issued
2012
Keywords
TermsetEmneord::Optikk
TermsetEmneord::Elektronstråler
Permalink
http://hdl.handle.net/20.500.12242/443
http://publications.ffi.no/handle/123456789/443
DOI
10.1364/OL.37.001619
Collection
Articles
Description
Vicario, Carlo; Trisorio, Alexandre; Arisholm, Gunnar; Hauri, Christoph P.. Deep-ultraviolet picosecond flat-top pulses by chirp-matched sum frequency generation. Optics Letters 2012 ;Volum 37.(10) s. 1619-1621
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Abstract
Picosecond, flat-top, deep-UV pulses are needed to generate high-brightness electron beams to efficiently drive x-ray free electron lasers. Current metal photocathodes have low efficiency and therefore require high-energy pulses, and the generation of high-energy, flat-top pulses in the deep UV is still challenging. The low efficiencies of both the harmonic generation and deep-UV pulse shapers restrict the accessible pulse energy. Moreover, the acceptance bandwidth of the harmonic generation limits the minimum rise time of the flat-top profile. We present the generation of few-hundred microjoule, picosecond, deep-UV pulses using chirp-matched sum frequency generation. This scheme combined with IR spectral manipulation is a novel approach for deep-UV pulse shaping. It permits flat-top pulses with high energy and fast rise time, highly suited for high-brightness photoelectron beam production.
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