Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 29, Issue 2, Pages 244-248Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.29.000244
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Funding
- U.S. National Science Foundation (NSF) [ECCS-1028825]
- Georgia Research Alliance
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1028825] Funding Source: National Science Foundation
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Even so-called complete ultrashort laser pulse-measurement techniques actually have ambiguities and so are not truly complete. In particular, the spectral-interferometry technique called scanning SEA TADPOLE measures the complete spatiotemporal intensity and phase of arbitrary ultrashort pulses (using a previously characterized spatially uniform reference pulse), but the difficulty of maintaining the stability of the required interferometer to submicron resolution while scanning in space usually blurs the frequency-independent spatial component of the pulse phase. We show here, however, that this information is actually still contained in the measured SEA TADPOLE data, and using a simple Gerchberg-Saxton-like phase-diversity algorithm, it can be recovered from measurements in only two planes, yielding a truly complete spatiotemporal measurement of the pulse field, limited only by any possible ambiguities present in the reference pulse. (C) 2012 Optical Society of America
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