Coherent light generators – Particular beam control device – Nonlinear device
Reexamination Certificate
2011-03-08
2011-03-08
Van Roy, Tod T (Department: 2828)
Coherent light generators
Particular beam control device
Nonlinear device
C372S021000, C359S326000, C359S328000, C359S329000
Reexamination Certificate
active
07903701
ABSTRACT:
Lasers configured for intracavity harmonic generation of second and higher order harmonic laser beam energy include mode-matching optics, such as a curved mirror, for recycling an unused portion of an intermediate harmonic laser beam energy (e.g., second harmonic laser beam energy) to improve higher order harmonic laser beam energy generation efficiency (e.g., third or higher order harmonic laser beam energy generation efficiency) without sacrificing beam quality of the higher order harmonic laser beam energy. The curved mirror may be positioned out of a resonant laser cavity of the laser. A radius of curvature and a position of the curved mirror are selected so that a beam radius and a beam divergence of the recycled second harmonic laser beam energy are essentially the same as a beam radius and a beam divergence of incoming second harmonic laser beam energy everywhere along a beam path of the incoming second harmonic laser beam.
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Hua, legal representative Jufen
Huang Chung-Po
Wang Haiwen
Zhou Fuzheng
Electro Scientific Industries Inc.
Roy Tod T Van
Stoel Rives LLP
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