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. 21, 2015
Filed:
Dec. 12, 2012
Theodore G. Jones, Alexandria, VA (US);
Antonio C. Ting, Silver Spring, MD (US);
Daniel F. Gordon, Waldorf, MD (US);
Michael H. Helle, Arlington, VA (US);
Joseph R. Peñano, Fairfax Station, VA (US);
Theodore G. Jones, Alexandria, VA (US);
Antonio C. Ting, Silver Spring, MD (US);
Daniel F. Gordon, Waldorf, MD (US);
Michael H. Helle, Arlington, VA (US);
Joseph R. Peñano, Fairfax Station, VA (US);
The United States of America, as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A method for generating an extended underwater plasma. A first laser pulse is fired into a body of water to form an underwater optical filament coinciding with a low-energy plasma. A second laser pulse is fired into the water, targeted at the plasma. The second pulse heats the plasma, causing the formation of an extended superheated plasma volume in the water. The two laser pulses can be simultaneous or can be sequential, with the second pulse following the first pulse by up to the filament plasma lifetime. The extended superheated plasma creates an underwater acoustic pulse, wherein the duration, waveform and directivity of the pulse can be tailored by controlling the shape of the underwater laser-generated plasma.