OpticsInfoBase

Frontiers of Disk Lasers

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: JW1A.1
• OSA Technical Digest (CD)
• Speiser, Jochen
• Fifteen years after first commercialization, the Thin Disk Laser covers a broad spectrum of applications. Nevertheless, a lot of challenges remain, e.g. further scaling of power and...

Wavelength and Coherent Beam Combining for High Brightness Sources

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: JW1A.2
• OSA Technical Digest (CD)
• Fan, Tso Yee
• Beam combining of laser arrays with high efficiency and good beam quality for power and radiance scaling is a long-standing problem in laser technology. Recently, significant progress...

Pumping up the Pressure: Gas-Based Nonlinear Optics in Hollow Core Photonic Crystal Fibre

• Abstract
•  | Full Text: PDF

• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: JW2A.1
• OSA Technical Digest (CD)
• Russell, Philip
• Single-mode hollow core PCF provides an ideal environment for studying pressure-controlled nonlinear interactions between laser light and gases. An recent success is the efficient...

Development and Application of Ultrafast Laser Spectroscopy for Combustion Sensing

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: JW2A.2
• OSA Technical Digest (CD)
• Gord, James R
• Optical measurement techniques are powerful tools for detailed study of combustion chemistry and physics. Ultrafast (picosecond- and femtosecond-pulsed) lasers are driving the...

Real-time Explosive Detection and Imaging using CARS

• Abstract
•  | Full Text: PDF

• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM1B.2
• OSA Technical Digest (CD)
• Dogariu, Arthur; Pidwerbetsky, Alex
• We demonstrate fast and efficient detection of trace explosives using backscattered collinear CARS. Vibrational fingerprints of sub-microgram targets are analyzed in real-time....

Single-Beam CARS for Standoff Detection of Explosives and Development of Fiber Lasers Required for Practical Implementation

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM1B.3
• OSA Technical Digest (CD)
• Dantus, Marcos
• Sensitivity and selectivity of CARS signal from a single-beam laser setup are evaluated under real-time imaging conditions. Practical implementation would require ...

Development and Application of Optical Frequency Combs

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM1B.4
• OSA Technical Digest (CD)
• Diddams, Scott
• Various implementations of optical frequency combs will be presented. Recent applications of frequency combs to spectroscopic problems in scientific and ...

Demonstration of High Speed Imaging in Practical Propulsion Systems using Hyperspectral Tomography

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM1B.5
• OSA Technical Digest (CD)
• Ma, Lin; Li, Xuesong; Roy, Sukesh; Caswell, Andrew; Gord, James R; Plemmons, David; An, Xinliang; Sanders, Scott T
• This paper reports the demonstration of a 30-laser-beam tomography system in a J85 turbojet engine for the imaging of temperature and water vapor concentration at an overall repetition...

Mid-infrared Sulfur Dioxide Measurements at Elevated Temperatures for Emission Control

• Abstract
•  | Full Text: PDF

• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM2B.1
• OSA Technical Digest (CD)
• Geiser, Peter; Dang, Dung D; Bohman, Axel F; Kaspersen, Peter L
• Mid-infrared measurements of sulfur dioxide at gas-temperatures up to 400 °C have been performed using a continuous-wave room-temperature quantum cascade laser and second harmonic...

Recent Progress in Mid-Infrared Quantum Cascade Lasers

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM2B.2
• OSA Technical Digest (CD)
• Gmachl, Claire
• Quantum Cascade laser performance continues to increase rapidly based on new understanding of materials and interfaces, quantum designs, and optical cavities/waveguides. We review...

Mode-Hop Free Tunable Mid-Infrared VECSEL

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM2B.3
• OSA Technical Digest (CD)
• Fill, Matthias; Felder, Ferdinand; Rahim, Mohamed; Khiar, Amir; Zogg, Hans
• Continuously tunable Vertical External Cavity Surface Emitting Lasers (VECSEL) have been realized, emitting in the 3-5 µm range. Pulsed output power at room temperature operation is...

High-Precision Instrumentation for CO2 Isotope Ratio Measurements

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM2B.4
• OSA Technical Digest (CD)
• Gomez, Anthony; Silver, Joel A
• A high-precision isotopic CO₂ measurement system is being developed that removes effects from pressure, temperature and moisture, and that has characteristics suitable for...

Interband Cascade Lasers for Spectroscopy with Very Low Input Power

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM2B.5
• OSA Technical Digest (CD)
• Meyer, Jerry R; Merritt, Chalres D; Bewley, William W; Canedy, Chadwick L; Kim, Chul Soo; Abell, Joshua; Vurgaftman, Igor; Kim, Mijin
• We report cw interband cascade lasers operating to 109 C, which at room temperature emit at wavelengths > 5.5 microns with output powers > 150 mW, wallplug efficiencies > 13%,...

Standoff Detection of Explosives and High Sensitive Detection of Chemicals in Drinking Water with Quantum Cascade Lasers

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM2B.6
• OSA Technical Digest (CD)
• Fuchs, Frank; Hugger, Stefan; Yang, Quankui; Kinzer, Michel; Bronner, Wolfgang; Lösch, Rainer; Aidam, Rolf; Degreif, Kai; Konz, Werner; Rademacher, Sven; Schnürer, Frank; Schweikert, Wenka
• Based on broadly tunable external cavity quantum lasers (EC-QCL) an imaging system has been developed for stand-off detection of traces of explosives. A similar EC-QCL serves for...

High-precision Analysis of N2O Isotopomers by QCLAS and its Application to Microbial Processes in Soil and Waste Water

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM3B.1
• OSA Technical Digest (CD)
• Emmenegger, Lukas; Manninen, Albert; Tuzson, Bela; Köster, Jan-Reent; Wunderlin, Pascal; Mohn, Joachim
• We report the first continuous measurements of 15N in N₂O (δ15Nα and δ15Nβ) by QCL absorption spectroscopy at elevated and ambient mixing ratios with a 0.1‰ precision,...

Application of LASER in Detection and Manipulation of Biomolecules in Lab-on-a-Chip Devices

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM3B.2
• OSA Technical Digest (CD)
• Dutta, Prashanta
• “Lab-on-a-chip” microfluidic devices can be used for various bioanalytical experiments such as sensing single molecules, separation of cells, and purification of proteins.

Elemental Mercury Detection by Multi-mode Diode Lasers Employing Correlation Spectroscopy

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM3B.4
• OSA Technical Digest (CD)
• Somesfalean, Gabriel; Lou, Xiutao; Svanberg, Sune; Zhang, Zhiguo
• A method for elemental mercury detection was demonstrated by employing multimode laser radiation at 254 nm in combination with correlation spectroscopy. The UV light was generated by...

Real Time Monitoring of Exhaled Breath Using Intracavity Absorption Spectroscopy with an Er-Doped Fiber Laser

• Abstract
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• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM3B.5
• OSA Technical Digest (CD)
• Fjodorow, Peter; Leal, Luis; Loehden, Benjamin; Kuznetsova, Svetlana; Sengstock, Klaus; Baev, Valery M
• Intracavity absorption spectroscopy with a broadband Er-doped fiber laser is applied for real time monitoring of the CO₂ concentration in human breath....

Quantum Cascade Laser for Breath Analysis: Application to Nitric Oxide Monitoring

• Abstract
•  | Full Text: PDF

• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM3B.6
• OSA Technical Digest (CD)
• Mandon, Julien; Högman, Marieann; Merkus, Peter J F M; van Amsterdam, Jan; Harren, Frans J M; Cristescu, Simona M
• Exhaled Nitric Oxide is considered as an indicator of asthma diagnostic. We present a QCL-based sensor for sub-ppbv detection and compare its sensitivity and selectivity with...

A New, Nondispersive Raman Analyzer to Measure Molecular Densities with high Sensitivity in Complex Environments

• Abstract
•  | Full Text: PDF

• Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) 2012 paper: LM5.1B.1
• OSA Technical Digest (CD)
• Fink, Manfred; Varghese, Philip; Borysow, Jacek
• A novel Raman spectral analyzer will be used to measure the concentrations of dilute species in complex systems with high resolutions (0.3 cm^-1), and high ...