The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 27, 2001
Filed:
Aug. 05, 1998
The University Court of the University of St. Andrews, St. Andrews, GB;
Abstract
There is provided an autocorrelator of ultrashort electromagnetic pulses, comprising an interferometer for receiving a parent electromagnetic pulse from an energy source and for deriving two daughter electromagnetic pulses from the parent pulse, an output means coupled to the interferometer to output the daughter pulses, and a photodiode in communication with the output means to detect the daughter pulses and to alter the frequency thereof so as to produce an electrical output signal that has a quadratic dependence on the power associated with the parent electromagnetic pulse. The temporal duration of the pulses ranges from TO picoseconds to 5 femtoseconds. A GaAsP photodiode is used with a broad band response of 700-1300 nm. The interferometer is either a Michelson interferometer or a Wollaston prism interferometer and a microscope objective is provided between the output means and the photodiode so that the pulses from the output means are focused onto a defined area of the photodiode.