Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 26, Issue 9, Pages 1818-1830Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.26.001818
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Funding
- European Commission [MRTN-CT-2003-505138]
- Engineering and Physical Sciences Research Council (UK) (EPSRC) [ER/S24015/OJ]
- Oxford University
- Royal Society
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We show that using multiple shears in spectral shearing interferometry is a powerful technique for improving precision, thus enabling the measurement of more complex pulses and resolving phase ambiguities. We derive an efficient and robust optimal phase reconstruction algorithm for extracting the spectral phase from interferograms taken at an arbitrary number of different shears. We show that if the shear is easily adjustable then a multishear measurement always offers a superior precision, even when considering the loss of precision of the raw data necessitated by multiple acquisitions. We present numerical examples and demonstrate an experimental implementation of the measurement of a double pulse using two shears. (C) 2009 Optical Society of America
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