David J Oakes

US Patent:

8432949, Apr 30, 2013

Filed:

Sep 14, 2010

Appl. No.:

12/881987

Inventors:

W. Terry Rawlins - Reading MA, US
David B. Oakes - Reading MA, US
Seonkyung Lee - Boston MA, US
Steven J. Davis - Londonderry NH, US

Assignee:

Physical Sciences Inc. - Andover MA

International Classification:

H01S 3/22

US Classification:

372 58, 372 55, 372 60, 372 76

Abstract:

A laser device includes an optical resonator, a microwave driven discharge device, and a source for a second gas. The microwave driven discharge device is disposed relative to the optical resonator. The microwave driven discharge device operates at a discharge power and gas flow rate to produce a selected amount of energetic singlet oxygen metastables flowing in the direction of the optical resonator. The second source for the second gas is disposed between the optical resonator and the microwave driven discharge device. The second gas reacts with the selected amount of energetic singlet oxygen metastables to form an excited species in an amount sufficient to support lasing of the excited species in the optical resonator.

US Patent:

20120087385, Apr 12, 2012

Filed:

Oct 11, 2011

Appl. No.:

13/270796

Inventors:

David B. Oakes - Reading MA, US
Richard T. Wainner - Somerville MA, US
William J. Kessler - Groton MA, US

International Classification:

H01S 3/04

US Classification:

372 34

Abstract:

An infrared flare includes at least one diode laser configured to emit radiation in a near-infrared spectrum and an optical system configured to transform the radiation output from the at least one diode laser. Each of the at least one diode lasers are coupled to a laser mount. The infrared flare further includes a thermal management system configured to absorb waste heat generated by the at least one diode laser. The thermal management system is configured to maintain the laser mount at or below 60 C. during operation of the infrared flare.

US Patent:

20130101770, Apr 25, 2013

Filed:

Oct 18, 2012

Appl. No.:

13/655240

Inventors:

Physical Sciences, Inc. - Andover MA, US
David B. Oakes - Reading MA, US
Edward J. Salley - Andover MA, US
Allan Dokhan - Belmont MA, US
Kophu Chiang - North Andover MA, US
Alan Gelb - Boston MA, US
John Hagge - Laporte MN, US
B. David Green - Methuen MA, US

Assignee:

Physical Sciences, Inc. - Andover MA

International Classification:

B29D 11/00

US Classification:

428 358, 427487, 427162

Abstract:

A method of forming a metalized polymeric bubble in a space, microgravity environment is described. A liquid polymer bubble having a predetermined diameter is formed from a mixture comprising a liquid polymer and at least one of a UV curing material, a stabilizer, a UV absorber, or a surfactant. The liquid polymer bubble is cured with radiation to form a rigid polymer bubble. The rigid polymer bubble is then metalized with a metal to form the metalized polymeric bubble.

US Patent:

20130205751, Aug 15, 2013

Filed:

Oct 11, 2012

Appl. No.:

13/649803

Inventors:

Physical Sciences, Inc. - , US
Lawrence G. Piper - Reading MA, US
David B. Oakes - Reading MA, US
Justin L. Sabourin - Somerville MA, US
Adam J. Hicks - Melrose MA, US
B. David Green - Methuen MA, US
Anait Tsinberg - Somerville MA, US
Allan Dokhan - Belmont MA, US

Assignee:

Physical Sciences, Inc. - Andover MA

International Classification:

C06C 9/00
F02K 9/95

US Classification:

60213, 60 39824

Abstract:

A catalyst free method of igniting an ionic liquid is provided. The method can include mixing a liquid hypergol with a HAN-based ionic liquid to ignite the HAN-based ionic liquid in the absence of a catalyst. The HAN-based ionic liquid and the liquid hypergol can be injected into a combustion chamber. The HAN-based ionic liquid and the liquid hypergol can impinge upon a stagnation plate positioned at top portion of the combustion chamber.