Richard T Wainner

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:

20230107797, Apr 6, 2023

Filed:

Oct 4, 2022

Appl. No.:

17/959798

Inventors:

- Houston TX, US
SHIN-JUH CHEN - Arlington MA, US
NICHOLAS F. AUBUT - Raymond NH, US
RICHARD T. WAINNER - Somerville MA, US

Assignee:

HEATH CONSULTANTS INCORPORATED - Houston TX

International Classification:

G01N 21/3504
G01N 21/39
G01N 33/00

Abstract:

A system for measuring a target gas via laser absorption spectroscopy in an open-air configuration, comprising a mid-infrared distributed feedback interband cascade laser (mid-IR DFB-ICL) having a wavelength selected to correspond with a spectral absorption line of the target gas and first electronic circuitry to control the laser temperature, current and modulation frequency. The mid-IR DFB-ICL is mounted to a heat sink. The system includes an optical component that projects a beam of the mid-IR DFB-ICL onto a distal backscattering directionally-reflective target and an optical receiver assembly that receives a fraction of the laser light that is backscattered from the directionally-reflective target and focuses the collected light onto an uncooled photodetector having a spectral bandwidth and optical configuration selected to optimize signal-to-noise response to received laser light. The optical receiver assembly comprises a primary mirror for receiving laser light backscattered from the directionally-reflective target and focusing the collected light onto the uncooled photodetector.