Coherent light generators – Particular resonant cavity – Plural cavities
Reexamination Certificate
2006-04-13
2010-10-12
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular resonant cavity
Plural cavities
C372S030000, C372S092000, C372S094000, C356S300000, C356S301000, C356S303000
Reexamination Certificate
active
07813406
ABSTRACT:
An optical pulse stretcher and a mathematical algorithm for the detailed calculation of its design and performance is disclosed. The optical pulse stretcher has a plurality of optical cavities, having multiple optical reflectors such that an optical path length in each of the optical cavities is different. The optical pulse stretcher also has a plurality of beam splitters, each of which intercepts a portion of an input optical beam and diverts the portion into one of the plurality of optical cavities. The input optical beam is stretched and a power of an output beam is reduced after passing through the optical pulse stretcher and the placement of the plurality of optical cavities and beam splitters is optimized through a model that takes into account optical beam divergence and alignment in the pluralities of the optical cavities. The optical pulse stretcher system can also function as a high-repetition-rate (MHz) laser pulse generator, making it suitable for use as a stroboscopic light source for high speed ballistic projectile imaging studies, or it can be used for high speed flow diagnostics using a laser light sheet with digital particle imaging velocimetry. The optical pulse stretcher system can also be implemented using fiber optic components to realize a rugged and compact optical system that is alignment free and easy to use.
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Kojima Jun
Nguyen Quang-Viet
Earp III Robert H.
Harvey Minsun
The United States of America as represented by the Administrator
Zhang Yuanda
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