Abstract: Optically multiplexed mid-infrared laser systems and the use of such systems for detection and measurement of target materials using multispectral image analysis are disclosed. The systems and methods disclosed herein are useful for detecting and measuring materials in applications such as trace detection, medical diagnostics, medical monitoring, quality control, and high-throughput molecular recognition.

Abstract: A system and method for standoff detection of explosives, CWAs and TICs using optical techniques. Preliminary analysis indicates detection of TNT at a distance of 0.5 km with a signal-to-noise ratio exceeding 10,000. The optical/thermal techniques apparently permit unambiguous detection of the target molecules even the presence of commonly encountered interferents. The technique, named Remote Optothermal Sensor (ROSE), has the potential for standoff detection at distances greater than one (1) kilometer.

Abstract: A system and method for standoff detection of explosives, CWAs and TICs using optical techniques. Preliminary analysis indicates detection of TNT at a distance of 0.5 km with a signal-to-noise ratio exceeding 10,000. The optical/thermal techniques apparently permit unambiguous detection of the target molecules even the presence of commonly encountered interferents. The technique, named Remote Optothermal Sensor (ROSE), has the potential for standoff detection at distances greater than one (1) kilometer.

Abstract: Detection and identification of minute quantities of condensed or solid state materials with significantly improved performance over the present state-of-the-art, comprises illuminating a small target particle with an appropriate laser radiation at a wavelength that is strongly absorbed by the target. The resulting temperature rise is observed by monitoring the increased blackbody radiation from the sample. An unambiguous determination of the target compound or the target material composition can be achieved through the use of a tunable laser that generates an absorption fingerprint of the target.

Abstract: Detection and identification of minute quantities of condensed or solid state materials with significantly improved performance over the present state-of-the-art, comprises illuminating a small target particle with an appropriate laser radiation at a wavelength that is strongly absorbed by the target. The resulting temperature rise is observed by monitoring the increased blackbody radiation from the sample. An unambiguous determination of the target compound or the target material composition can be achieved through the use of a tunable laser that generates an absorption fingerprint of the target.

Abstract: A high efficiency, low cost, nondispersive optical multiplexing arrangement for optical beams, used a technique denominated “Reverse Laser Scanning.” In the Reverse Laser Scanning operation, different laser beams angularly meet on the rotational axis of a galvanometer-mounted mirror or the like. Upon reflection from the mirror, each of the laser beams is propagated along one defined direction by appropriate angular positioning of the galvanometer mirror. The process enables several useful deployments, including multi-chemical detection using several lasers in the same sensor, remotely operated laser switching for medical surgery and diagnosis where multiple lasers may be used, and wavelength, code, and time division multiplexing in communication systems, among others.

Abstract: The purpose of the nonlinear spectrophotometer is to provide a simple instrument that can be used on a routine basis to accurately measure the two-photon absorption (TPA) coefficient and cross-section on a wide variety of materials. The instrument is capable of measuring: (1) both organic and inorganic materials, (2) solutions and thin film materials forms, and (3) materials which are fluorescent and nonfluorescent.

Abstract: The purpose of the nonlinear spectrophotometer is to provide a simple instrument that can be used on a routine basis to accurately measure the two-photon absorption (TPA) coefficient and cross-section on a wide variety of materials. The instrument is capable of measuring: (1) both organic and inorganic materials, (2) solutions and thin film materials forms, and (3) materials which are fluorescent and nonfluorescent.

Abstract: The principle and some applications of multiphoton pumped upconverted lasers (MU-LASER) in complex molecules like said material is demonstrated. Weak linear absorption and strong multiphoton absorption and upconverted fluorescence of said material in the form of integrated waveguides is responsible for the MU-LASER action of upconverting narrow band infrared wavelength to visible spectrum of bandwidth.about.50 nm and peak at 570 nm. Applications in efficient upconversion of diode laser wavelengths, displays, and two types of surface-emitting MU-LASERs for high definition television (HDTV) are produced.