United States of America As Represented by the Secretary of the Air Force

Purdue Research Foundation

Thomas N Anderson

Robert P Lucht

James R Gord

Sukesh Roy

Rodolfo Barron-Jimenez

Thomas Walther

Jerald A Caton

Michael A Brown

Waruna D Kulatilaka

Michael S Brown

Thomas L Bougher

Sherif F Hanna

Optical parametric oscillators (OPO) and systems are provided. The OPO has a non-linear optical material located between two optical elements where the product of the reflection coefficients of the optical elements are higher at the output wavelength than at either the pump or idler wavelength. The OPO output may be amplified using an additional optical parametric amplifier (OPA) stage.

Injection-seeded optical parametric oscillator and system

An all-solid-state continuous-wave (cw) laser system for measurements of the absorption by the CO molecule of mid-infrared radiation in the 4.3-4.6 &#x3bc;m range is described, wherein a single-mode, tunable output of a 70 mW, 860-nm ECDL is difference frequency mixed with the output of a 550 mW diode-pumped cw Nd:YAG laser in a PPLN crystal to produce approximately 1 &#x3bc;W of tunable cw radiation at 4.5 &#x3bc;m.

Diode-laser-based mid-infrared absorption sensor for carbon monoxide

A nitric oxide sensor and method is disclosed. The sensor is based on sum-frequency mixing of a tunable, 395-nm external cavity diode laser with a 532-nm diode-pumped intracavity-frequency-doubled Nd:YAG laser in a beta-barium-borate crystal. The output from the BBO crystal is ultraviolet radiation at 227 nm and is split using a 50&#x2014;50 beam splitter. Half of the radiation is directed into a reference photomultiplier tube, and the other half of the UV radiation is directed through the medium of interest and then directed into a signal photomultiplier tube. The output from the photomultiplier tubes is compared and the difference utilized to indicate the level of nitric oxide by absorption-based spectrosocpic techniques.

Nitric oxide sensor and method

Growing community of inventors

Seguin, TX, United States of America

Thomas N Anderson