Dr. Jason M. Kriesel Profile

Dr. Jason M. Kriesel

Lead Scientist at Opto-Knowledge Systems Inc

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Publications (16)

PROCEEDINGS ARTICLE | January 26, 2018

Tapered hollow-core fibers providing single-mode output in the 3.5um-7.8um spectral range

Proc. SPIE. 10540, Quantum Sensing and Nano Electronics and Photonics XV

KEYWORDS: Optical fibers, Mid-IR, Laser sources, Waveguides, Quantum cascade lasers, Laser beam propagation, Collimation

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SPIE Journal Paper | August 24, 2017

Low-loss and single-mode tapered hollow-core waveguides optically coupled with interband and quantum cascade lasers

Giglio, Marilena , Patimisco, Pietro , Sampaolo, Angelo , Kriesel, Jason , Tittel, Frank , Spagnolo, Vincenzo

OE Vol. 57 Issue 01

KEYWORDS: Quantum cascade lasers, Waveguides, Wave propagation, Silver, Laser sources, Laser optics, Silica, Capillaries, Dielectrics, Laser beam propagation

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PROCEEDINGS ARTICLE | May 5, 2017

Versatile, ultra-low sample volume gas analyzer using a rapid, broad-tuning ECQCL and a hollow fiber gas cell

Proc. SPIE. 10210, Next-Generation Spectroscopic Technologies X

KEYWORDS: Mid-IR, Methane, Waveguides, Fiber optics, Sensors, Spectroscopy, Molecules, Gases, Sulfur, Quantum cascade lasers, Spectral resolution, Absorption

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PROCEEDINGS ARTICLE | February 13, 2016

Hollow-core waveguide for single-mode laser beam propagation in the spectral range of 3.7-7.3 μm

Proc. SPIE. 9755, Quantum Sensing and Nano Electronics and Photonics XIII

KEYWORDS: Optical fibers, Mid-IR, Waveguides, Fiber optics, Dielectrics, Quantum cascade lasers, Imaging spectroscopy, Laser beam propagation, Single mode fibers, Wave propagation, Infrared radiation, Waveguide modes, Waveguide lasers, Light wave propagation

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PROCEEDINGS ARTICLE | February 8, 2015

Mid-IR quantum cascade laser mode coupling in hollow-core, fiber-optic waveguides with single-mode beam delivery

Proc. SPIE. 9370, Quantum Sensing and Nanophotonic Devices XII

KEYWORDS: Optical fibers, Mid-IR, Waveguides, Fiber optics, Lenses, Beam delivery, Quantum cascade lasers, Wave propagation, Hollow waveguides, Light wave propagation

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PROCEEDINGS ARTICLE | February 8, 2015

Use of external cavity quantum cascade laser compliance voltage in real-time trace gas sensing of multiple chemicals

Proc. SPIE. 9370, Quantum Sensing and Nanophotonic Devices XII

KEYWORDS: Infrared detectors, Carbon dioxide, Sensors, Gases, Bioalcohols, Quantum cascade lasers, Absorbance, Chemical analysis, Signal detection, Absorption

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PROCEEDINGS ARTICLE | January 31, 2014

Further developments of capillary absorption spectrometers using small hollow-waveguide fibers

Proc. SPIE. 8993, Quantum Sensing and Nanophotonic Devices XI

KEYWORDS: Optical fibers, Carbon dioxide, Modulation, Sensors, Capillaries, Quantum cascade lasers, Semiconductor lasers, Frequency modulation, Absorbance, Absorption

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Our objective is to enhance quantification of stable carbon and oxygen isotope ratios to better than 1‰ relative isotope precision for sample sizes < 1 pico-mole. A newer variant Capillary Absorption Spectrometer (CAS) is described using a proprietary linear-taper hollow waveguide in conjunction with wavelength and frequency modulation techniques of tunable laser absorption spectrometry. Previous work used circular capillaries with uniform 1 mm ID to measure ¹³C/¹²C ratios with ≥ 20 pico-mole samples to ≤ 10 ppm (1‰ precision against standards) [1]. While performing fairly well, it generated residual modal noise due to multipath propagation in the hollow-waveguides (HWGs). This system has been utilized with laser ablation-catalytic combustion techniques to analyze small resolution (~ 25 μm spot diameter) laser ablation events on solids. Using smaller ID capillary waveguides could improve detection limits and spatial resolutions. Reducing an IR compatible hollow waveguide’s inner diameter (ID) to < 300 μm, reduces modal noise significantly for mid-IR operation, but feedback noise with high gain semiconductor lasers can become problematic. A proprietary linear-taper small waveguide (mean ID = 0.35 mm, L = 1 m) was tested to understand whether modal noise and optical feedback effects could be simultaneously reduced. We see better mode filtering and, significant reductions of feedback noise under favorable coupling of a multi-spatial mode QC laser to the smaller ID of the linear-tapered HWG. We demonstrate that better modal coupling operation is consistent with Liouville’s theorem, where greater suppression of feedback from spurious scatter within the HWG occurs by injecting the laser into the smaller ID port. Our progress on developing lighter weight, potentially fieldable alternatives to Isotope Ratio Mass Spectrometers (IRMS) with a small volume (≤ 0.1 cm³) CAS system will be discussed and compared to other competitive systems.

PROCEEDINGS ARTICLE | January 31, 2014

Spatial mode filtering of mid-infrared (mid-IR) laser beams with hollow core fiber optics

Proc. SPIE. 8993, Quantum Sensing and Nanophotonic Devices XI

KEYWORDS: Mid-IR, Optical filters, Waveguides, Fiber optics, Spatial filters, Quantum cascade lasers, Fiber lasers, Optical testing, Molecular spectroscopy, Fiber couplers

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PROCEEDINGS ARTICLE | February 4, 2013

Part-per-trillion level detection of SF6 using a single-mode fiber-coupled quantum cascade laser and a quartz enhanced photoacoustic sensor

Proc. SPIE. 8631, Quantum Sensing and Nanophotonic Devices X

KEYWORDS: Mid-IR, Modulation, Sensors, Quartz, Quantum cascade lasers, Fiber lasers, Photoacoustic spectroscopy, Acoustics, Signal detection, Absorption

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PROCEEDINGS ARTICLE | May 15, 2012

Snapshot hyperspectral fovea vision system (HyperVideo)

Proc. SPIE. 8390, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XVIII

KEYWORDS: Hyperspectral imaging, Fiber optics, Imaging systems, Cameras, Sensors, Spectroscopy, Image resolution, Temporal resolution, Spectral resolution, Spatial resolution

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PROCEEDINGS ARTICLE | February 17, 2012

Investigation of tapered silver / silver halide coated hollow glass waveguides for the transmission of CO2 laser radiation

Proc. SPIE. 8218, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII

KEYWORDS: Thin films, Waveguides, Reflection, Signal attenuation, Glasses, Dielectrics, Silver, Carbon dioxide lasers, Geometrical optics, Beam propagation method

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PROCEEDINGS ARTICLE | February 1, 2012

Multilayer silver / dielectric thin-film coated hollow waveguides for sensor and laser power delivery applications

Proc. SPIE. 8218, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII

KEYWORDS: Thin films, Refractive index, Multilayers, Reflection, Signal attenuation, Dielectrics, Silver, Surface roughness, Cadmium sulfide, Lead

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Hollow Glass Waveguides (HGWs) incorporating single dielectric thin film designs deposited on silver coated silica hollow waveguides have been used for low-loss transmission of infrared radiation in the 2 - 14 micrometer region. Silver iodide has traditionally been the material of choice as a dielectric thin film in HGWs, with other dielectric thin film materials such as cadmium sulfide and lead sulfide being used as well. The incorporation of multilayer stacks of alternating low and high refractive index dielectric thin films in HGWs has been theoretically shown to further reduce the optical attenuation. Theoretically, lower losses are achieved when the refractive index contrast of the two thin film materials used is high and the number of films incorporated in the HGW film structure increases. Theoretically, such multilayer dielectric stack designs can give rise to the appearance of 1-D photonic bandgap structures with omnidirectional reflection properties as long as critical design parameters are met and scattering contributions due to surface roughness and similar defects are sufficiently low. This study involves the practical design of multilayer dielectric stacks in HGWs, with lead sulfide as a high refractive index material and cadmium sulfide as low refractive index material. The design, optimization, and processing methodology for achieving low-loss multilayer dielectric stacks in HGWs at desired infrared wavelengths is discussed. Characterization of multilayer dielectric coated HGWs includes FTIR spectroscopy for determining the optical response and infrared laser measurements for determining the optical attenuation properties of said multilayer dielectric stack coated HGWs. The experimental loss dependency of dielectric coated HGWs incorporating such metal chalcogenide materials on the particular thin film materials used and number of dielectric layers incorporated is presented and challenges in the current fabrication methodology are discussed.

PROCEEDINGS ARTICLE | June 4, 2011

Hollow core fiber optics for mid-wave and long-wave infrared spectroscopy

Proc. SPIE. 8018, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII

KEYWORDS: Long wavelength infrared, Mid-IR, Waveguides, Fiber optics, Glasses, Carbon dioxide lasers, Beam delivery, Quantum cascade lasers, Infrared spectroscopy, Infrared radiation

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PROCEEDINGS ARTICLE | February 17, 2011

Hollow waveguides for the transmission of quantum cascade laser (QCL) energy for spectroscopic applications

Proc. SPIE. 7894, Optical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI

KEYWORDS: Long wavelength infrared, Optical filters, Silica, Waveguides, Glasses, Spectroscopy, Silver, Quantum cascade lasers, Infrared spectroscopy, Hollow waveguides

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PROCEEDINGS ARTICLE | April 28, 2010

True-color night vision (TCNV) fusion system using a VNIR EMCCD and a LWIR microbolometer camera

Proc. SPIE. 7697, Signal Processing, Sensor Fusion, and Target Recognition XIX

KEYWORDS: Microbolometers, Long wavelength infrared, Image fusion, Optical filters, Imaging systems, Cameras, Night vision, Electron multiplying charge coupled devices, Night vision systems, Prototyping

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PROCEEDINGS ARTICLE | May 2, 2007

True-color night vision cameras

Proc. SPIE. 6540, Optics and Photonics in Global Homeland Security III

KEYWORDS: Signal to noise ratio, Near infrared, Optical filters, Visible radiation, Cameras, Sensors, Night vision, Electron multiplying charge coupled devices, Liquid crystals, Image filtering

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Showing 5 of 16 publications

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