Enabling standoff detection of hazardous materials using a fiber optic coupled quantum cascade infrared laser system

2018 ◽  
Author(s):  
Kevin J. Major ◽  
Kenneth J. Ewing ◽  
Jasbinder S. Sanghera ◽  
Rafael R. Gattass ◽  
L. Brandon Shaw ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Laser System ◽  
Hazardous Materials ◽  
Infrared Laser ◽  
Quantum Cascade ◽  
Standoff Detection

scholarly journals Fiber optic coupled quantum cascade infrared laser system for detection of explosive materials on surfaces

2019 ◽  
Vol 119 ◽  
pp. 105635 ◽  
Author(s):  
Kevin J. Major ◽  
L. Brandon Shaw ◽  
Lynda Busse ◽  
Rafael Gattass ◽  
David Arnone ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Laser System ◽  
Infrared Laser ◽  
Quantum Cascade ◽  
Explosive Materials

First experiences with a 2.0-μm near infrared laser system for neuroendoscopy

2007 ◽  
Vol 30 (3) ◽  
pp. 195-201 ◽  
Author(s):  
H. C. Ludwig ◽  
T. Kruschat ◽  
T. Knobloch ◽  
H.-O. Teichmann ◽  
K. Rostasy ◽  
...  
Keyword(s):  
Near Infrared ◽  
Laser System ◽  
Infrared Laser

Automated Multi-Diode Laser System for WDM Couplers Insertion Loss Measurements

2012 ◽  
Vol 2 (3) ◽  
pp. 1-7 ◽  
Author(s):  
Sami D. Alaruri
Keyword(s):  
Standard Deviation ◽  
Measurement System ◽  
Insertion Loss ◽  
Fiber Optic ◽  
Laser System ◽  
Internal Standards ◽  
Loss Measurement ◽  
Passive Fiber ◽  
Optical Attenuators ◽  
Variable Optical Attenuators

Insertion loss is an important parameter used to characterize passive fiber-optic components, such as WDM couplers and variable optical attenuators. This article describes an automated insertion loss measurement system which incorporates 980 nm, 1310 nm, 1529 nm and 1561 nm DFB lasers and two internal fiber optic standards. Insertion loss measurements collected with the system for WDM couplers and internal standards are presented. The system repeatability was validated by measuring the insertion loss for a WDM coupler six times at 980 nm, 1310 nm, 1529 nm and 1561 nm over 3 days period. The standard deviation calculated for the insertion loss measurements is less than 0.11 dB and the %CV is less than 1%.

scholarly journals Standoff detection of chemical plumes from high explosive open detonations using a swept-wavelength external cavity quantum cascade laser

2020 ◽  
Vol 128 (16) ◽  
pp. 163103
Author(s):  
Mark C. Phillips ◽  
Sivanandan S. Harilal ◽  
Jeremy Yeak ◽  
R. Jason Jones ◽  
Sonia Wharton ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
High Explosive ◽  
External Cavity ◽  
Quantum Cascade ◽  
Standoff Detection

scholarly journals Fiber Optic Coupled Raman Based Detection of Hazardous Liquids Concealed in Commercial Products

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Michael L. Ramírez-Cedeño ◽  
Natalie Gaensbauer ◽  
Hilsamar Félix-Rivera ◽  
William Ortiz-Rivera ◽  
Leonardo Pacheco-Londoño ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Raman Spectroscopy ◽  
Fiber Optic ◽  
Hazardous Materials ◽  
Chemical Warfare Agent ◽  
Chemical Warfare ◽  
Consumer Products ◽  
Algorithm Analysis ◽  
Triethyl Phosphate ◽  
Industrial Compounds

Raman spectroscopy has been widely proposed as a technique to nondestructively and noninvasively interrogate the contents of glass and plastic bottles. In this work, Raman spectroscopy is used in a concealed threat scenario where hazardous liquids have been intentionally mixed with common consumer products to mask its appearance or spectra. The hazardous liquids under consideration included the chemical warfare agent (CWA) simulant triethyl phosphate (TEP), hydrogen peroxide, and acetone as representative of toxic industrial compounds (TICs). Fiber optic coupled Raman spectroscopy (FOCRS) and partial least squares (PLS) algorithm analysis were used to quantify hydrogen peroxide in whiskey, acetone in perfume, and TEP in colored beverages. Spectral data was used to evaluate if the hazardous liquids can be successfully concealed in consumer products. Results demonstrated that FOC-RS systems were able to discriminate between nonhazardous consumer products and mixtures with hazardous materials at concentrations lower than 5%.

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