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:
Oct. 15, 2002
Filed:
Apr. 24, 2000
Joseph M. Fukumoto, Rancho Palos Verdes, CA (US);
Raytheon Company, Lexington, MA (US);
Abstract
A passive Q switch. The inventive Q switch includes a first wedge of material adapted to absorb electromagnetic energy. The first wedge has a first thickness on a first end thereof and a second thickness on a second end thereof diametrically opposite the first end. The first wedge has a first surface connecting the first and second ends and a second surface connected the first and second ends. The second surface is slanted relative to the first surface. A second wedge of material is included in the inventive passive Q switch. As per the first wedge, the second wedge has a first thickness on a first end thereof and a second thickness on a second end thereof diametrically opposite the first end. The second wedge has a first surface connecting the first and second ends and a second surface connecting the first and second ends. The second surface is slanted relative to the first surface. The second surface of the first wedge is mounted in optical alignment with the second surface of the second wedge and in a plane parallel thereto. In the illustrative embodiment, the wedges are made of chromium:yttrium aluminum garnet (Cr :YAG) and mounted to allow the first and second wedges to translate relative to each other while maintaining a constant distant 'd' between the second surfaces thereof. The inventive Q-switch allows for a variable thickness and lasing hold off in a passive arrangement.