Ms. Cynthia R. Swim Profile

Cynthia R. Swim

Electrical Engineer at DEVCOM Chemical Biological Ctr

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Author

Publications (16)

Proceedings Article | 19 May 2006 Paper

Overview of chem-bio sensing

Cynthia Swim, Richard Vanderbeek, Darren Emge, Anna Wong

Proceedings Volume 6218, 621802 (2006) https://doi.org/10.1117/12.669835

KEYWORDS: LIDAR, Long wavelength infrared, Raman spectroscopy, Industrial chemicals, Sensors, Aerosols, Nanoimprint lithography, Chemical analysis, Biological and chemical sensing, Standoff detection

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Proceedings Article | 12 May 2005 Paper

Update on active chem-bio sensing

Cynthia Swim, Richard Vanderbeek, Darren Emge, Anna Wong

Proceedings Volume 5795, (2005) https://doi.org/10.1117/12.603032

KEYWORDS: Industrial chemicals, Sensors, Atmospheric particles, Aerosols, Algorithm development, LIDAR, Nanoimprint lithography, Chemical analysis, Biological and chemical sensing, Active remote sensing

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Proceedings Article | 13 August 2004 Paper

Heterodyne lidar for chemical sensing

Richard Oldenborg, Joe Tiee, Tom Shimada, Carl Wilson, Dennis Remelius, Jay Fox, Cynthia Swim

Proceedings Volume 5416, (2004) https://doi.org/10.1117/12.541425

KEYWORDS: Heterodyning, Transceivers, Signal detection, LIDAR, Signal to noise ratio, Long wavelength infrared, Biological and chemical sensing, Target detection, Sensors, Absorption

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The overall objective is to assess the detection performance of LWIR (long wavelength infrared) coherent Lidar systems that potentially possess enhanced effluent detection capabilities. Previous work conducted by Los Alamos has demonstrated that infrared DIfferential Absorption Lidar (DIAL) is capable of detecting chemicals in plumes from long standoff ranges. Our DIAL approach relied on the reflectivity of topographical targets to provide a strong return signal. With the inherent advantage of applying heterodyne transceivers to approach single-photon detection in LWIR, it is projected that marked improvements in detection range or in spatial coverage can be attained. In some cases, the added photon detection sensitivity could be utilized for sensing “soft targets”, such as atmospheric and threat aerosols where return signal strength is drastically reduced, as opposed to topographical targets. This would allow range resolved measurements and could lead to the mitigation of the limiting source of noise due to spectral/spatial/temporal variability of the ground scene. The ability to distinguish normal variations in the background from true chemical signatures is crucial to the further development of sensitive remote chemical sensing technologies. One main difficulty in demonstrating coherent DIAL detection is the development of suitable heterodyne transceivers that can achieve rapid multi-wavelength tuning required for obtaining spectral signature information. LANL has recently devised a novel multi-wavelength heterodyne transceiver concept that addresses this issue. A 5-KHz prototype coherent CO₂ transceiver has been constructed and is being now used to help address important issues in remote CBW agent standoff detection. Laboratory measurements of signal-to-noise ratio (SNR) will be reported. Since the heterodyne detection scheme fundamentally has poor shot-to-shot signal statistics, in order to achieve sensitive detection limits, favorable averaging statistics have to be validated. The baseline coherent DIAL detection sensitivity that can be achieved averaging multiple laser pulses and by comparisons of different wavelengths will be demonstrated. Factors that are presently limiting performance and attempts to circumvent these issues will be discussed.

Proceedings Article | 13 August 2004 Paper

Review of active chem-bio sensing

Cynthia Swim

Proceedings Volume 5416, (2004) https://doi.org/10.1117/12.542673

KEYWORDS: Aerosols, LIDAR, Backscatter, Industrial chemicals, Sensors, Absorption, Scattering, Chemical analysis, Carbon dioxide lasers, Optical parametric oscillators

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Proceedings Article | 27 February 2004 Paper

Compact tunable all-solid-state LWIR source for standoff chemical detection

Yelena Isyanova, Evgueni Slobodtchikov, John Flint, Peter Moulton, Cynthia Swim, Jay Fox

Proceedings Volume 5268, (2004) https://doi.org/10.1117/12.517885

KEYWORDS: Optical parametric oscillators, Crystals, Long wavelength infrared, Neodymium lasers, Mirrors, Standoff detection, Solid state lasers, Oscillators, Resonators, Laser crystals

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Proceedings Article | 31 January 2002 Paper

Laser remote chemical sensors at Raytheon

David Cohn, Joseph Fukumoto, James Shepard, Cynthia Swim

Proceedings Volume 4539, (2002) https://doi.org/10.1117/12.454429

KEYWORDS: Sensors, Gas lasers, Optical parametric oscillators, Transmitters, Carbon monoxide, Second-harmonic generation, Data acquisition, Chemical fiber sensors, Receivers, Telescopes

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Proceedings Article | 9 January 2002 Paper

CO2 laser wavelength shifter

Michael Ehritz, David Cohn, Cynthia Swim

Proceedings Volume 4484, (2002) https://doi.org/10.1117/12.452772

KEYWORDS: Crystals, Optical parametric oscillators, Gas lasers, Second-harmonic generation, Carbon monoxide, Laser crystals, Resonators, Energy conversion efficiency, Absorption, Sensors

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Proceedings Article | 22 August 2001 Paper

WILDCAT chemical sensor development

David Cohn, Eric Griffin, Louis Klaras, Michael Ehritz, Cynthia Swim, Jay Fox

Proceedings Volume 4378, (2001) https://doi.org/10.1117/12.438194

KEYWORDS: Sensors, Gas lasers, Optical parametric oscillators, Second-harmonic generation, Data acquisition, Carbon monoxide, Transmitters, Telescopes, Chemical fiber sensors, Laser energy

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Proceedings Article | 22 August 2001 Paper

Compact DIAL sensor: SHREWD

David Cohn, Joseph Fukumoto, Jay Fox, Cynthia Swim

Proceedings Volume 4378, (2001) https://doi.org/10.1117/12.438195

KEYWORDS: Sensors, Transmitters, Optical parametric oscillators, Receivers, Data acquisition, Nd:YAG lasers, Energy efficiency, Mirrors, Absorption, Mercury cadmium telluride

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Proceedings Article | 28 July 2000 Paper

Standoff handheld real-time early warning detector (SHREWD)

Joseph Fukumoto, David Lim, David Cohn, Jay Fox, Cynthia Swim

Proceedings Volume 4036, (2000) https://doi.org/10.1117/12.394067

KEYWORDS: Sensors, Transmitters, Optical parametric oscillators, Receivers, Telescopes, Semiconductor lasers, Chemical elements, Quantum cascade lasers, Reflectivity, Signal detection

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Proceedings Article | 28 July 2000 Paper

Efficient 1-um to 8-12-um OPO converter

Joseph Fukumoto, Jay Fox, Cynthia Swim

Proceedings Volume 4036, (2000) https://doi.org/10.1117/12.394063

KEYWORDS: Optical parametric oscillators, Sensors, Crystals, Signal processing, Remote sensing, Energy conversion efficiency, Nd:YAG lasers, Semiconductor lasers, Biological and chemical sensing, Solid state lasers

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Proceedings Article | 28 July 2000 Paper

WILDCAT sensor

David Cohn, William Griffin, Louis Klaras, Eric Griffin, Hans Marciniak, Jay Fox, Cynthia Swim

Proceedings Volume 4036, (2000) https://doi.org/10.1117/12.394065

KEYWORDS: Sensors, Data acquisition, Telescopes, Clouds, Aerosols, Fourier transforms, Mirrors, LIDAR, Laser energy, Backscatter

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Proceedings Article | 28 May 1999 Paper

Detection of chemical agent aerosols

Jay Fox, Jeffrey Ahl, Francis D'Amico, Richard Vanderbeek, Raphael Moon, Cynthia Swim

Proceedings Volume 3707, (1999) https://doi.org/10.1117/12.351339

KEYWORDS: LIDAR, Liquids, Sensors, Aerosols, Explosives, Chemical lasers, Clouds, Pulsed laser operation, Standoff detection, Particles

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Proceedings Article | 3 July 1998 Paper

Tunable UV and compact 2- to 12-micron laser development

Cynthia Swim, Jay Fox

Proceedings Volume 3382, (1998) https://doi.org/10.1117/12.312630

KEYWORDS: Optical parametric oscillators, LIDAR, Sensors, Ultraviolet radiation, Standoff detection, Nd:YAG lasers, Laser development, Pulsed laser operation, Crystals, Solid state lasers

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Proceedings Article | 17 June 1996 Paper

Frequency-tunable UV laser system for biological and chemical detection

James Gorda, Eric Park, Martin Richardson, Jay Fox, Cynthia Swim

Proceedings Volume 2763, (1996) https://doi.org/10.1117/12.243269

KEYWORDS: Ultraviolet radiation, Biological detection systems, Laser systems engineering, Tunable lasers, Optical filtering, Q switched lasers, Laser development, Rod lasers, Lamps, Modulation

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Proceedings Article | 25 May 1994 Paper

Wavelength agile CO2 laser for chemical sensing

David Cohn, Jay Fox, Cynthia Swim

Proceedings Volume 2118, (1994) https://doi.org/10.1117/12.176650

KEYWORDS: Sensors, Gas lasers, Laser development, Carbon monoxide, Carbon dioxide lasers, Data acquisition, Telescopes, Calibration, Output couplers, Pulsed laser operation

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Showing 5 of 16 publications

Conference Committee Involvement (15)

Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVIII

11 April 2017 | Anaheim, CA, United States

Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVII

19 April 2016 | Baltimore, MD, United States

Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVI

21 April 2015 | Baltimore, MD, United States

Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XV

6 May 2014 | Baltimore, MD, United States

Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIV

30 April 2013 | Baltimore, Maryland, United States

Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII

24 April 2012 | Baltimore, Maryland, United States

Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII

26 April 2011 | Orlando, Florida, United States

Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XI

6 April 2010 | Orlando, Florida, United States

Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing X

14 April 2009 | Orlando, Florida, United States

Chemical Biological Radiological Nuclear and Explosives (CBRNE) Sensing IX

18 March 2008 | Orlando, Florida, United States

Chemical and Biological Sensing VIII

11 April 2007 | Orlando, Florida, United States

Chemical and Biological Sensing VII

19 April 2006 | Orlando (Kissimmee), Florida, United States

Chemical and Biological Sensing VI

28 March 2005 | Orlando, Florida, United States

Chemical and Biological Sensing V

12 April 2004 | Orlando, Florida, United States

Chemical and Biological Sensing IV

21 April 2003 | Orlando, Florida, United States

Showing 5 of 15 Conference Committees

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