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:
Jul. 13, 1982
Filed:
Jun. 03, 1980
Richard A Coppock, San Jose, CA (US);
Edward D Reed, Sunnyvale, CA (US);
GTE Products Corporation, Stamford, CT (US);
Abstract
An acousto-optic mode-locked laser comprises a piezo-electric, acousto-optic crystal disposed within the cavity of a laser in the path of the laser beam, and a radio-frequency energized interdigital transducer (IDT) array coupled to the crystal so as to launch bulk shear waves in the crystal for a limited number of interactions with the laser beam. The IDT is mounted on a first plane surface of the crystal opposite from a second plane surface thereof which is disposed at an acute angle .theta. to the first surface and which is nominally parallel to the laser beam. Bulk shear waves are launched in the crystal by the IDT at the first surface at the angle .theta. to a normal to that surface with the forward wave traversing the laser beam perpendicular to its axis and being reflected back through the beam by the opposite or second crystal surface to form standing waves which modulate the beam. This reflected wave thereafter is reflected by the first surface out of the interaction zone so as to be ineffective in establishing additional standing waves. Optimum efficiency of shear wave generation is achieved when