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Double-pulse characterization by self-referenced spectral interferometry

Research output: Contribution to journalArticle

L. Gulyás Oldal, T. Csizmadia , P. Ye, N. G. Harshitha, M. Füle, A. Zaïr

Original languageEnglish
Article number051106
JournalAPPLIED PHYSICS LETTERS
Volume115
Issue number5
Early online date31 Jul 2019
DOIs
Accepted/In press12 Jul 2019
E-pub ahead of print31 Jul 2019

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Abstract

The reconstruction of ultrashort optical pulses with a complex intensity substructure is demonstrated using the Self-Referenced Spectral Interferometry (SRSI) pulse characterization technique with a modified phase retrieval algorithm. A correction spectral phase term is extracted by the manipulation of the temporal interferogram, allowing the treatment of scenarios with complicated pulse shapes, where the original algorithm fails. The improved SRSI algorithm is verified through the application on two temporally well-separated pulses having the same polarization direction and spectral shape, generated by duplicating 37 fs-long amplified pulses of a Ti:Sa based laser system. The spectral phase of highly chirped double pulses with equal or different amplitude ratios is numerically retrieved. The collinear and achromatic experimental arrangement results in a compact and easy-to-align system.

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