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Fiber optic laser-induced breakdown spectroscopy sensor for molten material analysis

United States Patent

July 13, 2004
View the Complete Patent at the US Patent & Trademark Office
A fiber optic laser-induced breakdown spectroscopy (LIBS) sensor, including a laser light source, a harmonic separator for directing the laser light, a dichroic mirror for reflecting the laser light, a coupling lens for coupling the laser light at an input of a multimode optical fiber, a connector for coupling the laser light from an output of the multimode optical fiber to an input of a high temperature holder, such as a holder made of stainless steel, and a detector portion for receiving emission signal and analyzing LIBS intensities. In one variation, the multimode optical fiber has silica core and silica cladding. The holder includes optical lenses for collimating and focusing the laser light in a molten alloy to produce a plasma, and for collecting and transmitting an emission signal to the multimode optical fiber.
Zhang; Hansheng (Aliso Viejo, CA), Rai; Awadesh K. (Pantnagar, IN), Singh; Jagdish P. (Starkville, MS), Yueh; Fang-Yu (Starkville, MS)
Mississippi State University (Mississippi State, MS)
10/ 098,368
March 18, 2002
This invention was made with U.S. Government support under contract No. DE-FC26-98FT-40395 awarded by the Department of Energy. The U.S. Government may have certain rights in this invention.