Clinton J. Smith, Ph.D.

In under two years, we built from scratch (including materials development) and deployed a wireless mesh network of sensors using printed carbon nanotubes to detect methane leaks. The deployment was to the CSU METEC center in Ft. Collins, CO.

PSI-Developed Product Field Deployment

Using the RMLD^TM (developed by PSI) to take tomographic scans of simulated methane leaks in an experimental coal mine outside of Pittsburgh, PA.

Deploying the RMLD^TM to a coal mine and taking data. Image featured on PSI's website.

Sensors Built & Deployed for my PhD

In-lab soil respiration measurement

In the field measuring soil respiration

First all weather deployment (Beltsville, MD)

Preparing for Hurricane Sandy

MIRTHE instrument after a Nor'Easter

The two CO₂ sensors survive a Nor'easter

Real-Time Calibration Technique Developed for my PhD

Publications (Chronological Order):

Journal

[1] Michal Nikodem, Damien Weidmann, Clinton Smith, and Gerard Wysocki, "Signal-to-noise ratio in chirped laser dispersion spectroscopy," Opt. Express 20, 644-653 (2012).

[2] C. J. Smith, S. So, L. Xia, S. Pitz, K. Szlavecz, D. Carlson, A. Terzis, and G. Wysocki, “Wireless Laser Spectroscopic Sensor Node for Atmospheric CO₂ Monitoring – Laboratory and Field Test,” Appl Phys B110, 241-248 (2013).

[3] C. J. Smith, W. D. Li, G. Wysocki, and S. Y. Chou, "Electric Current Tuning the Self-Oscillation Frequency of EC-VCSELs," Photonics Technology Letters,

IEEE 25, 1707-1710 (2013).

[4] C. J. Smith, W. Wang, and G. Wysocki, “Real-time calibration of laser absorption spectrometer using spectral correlation performed with an in-line gas cell,” Optics Express, vol. 21, no. 19, pp. 22488-22503 (2013).

[5] (Invited) C. Smith, R. Shankar, M. Laderer, M. Frish, M. Loncar, and M. Allen, "Sensing nitrous oxide with QCL-coupled silicon-on-sapphire ring resonators," Opt. Express 23, 5491-5499 (2015).

[6] C. J. Smith, P. Ramamurthy, M. A. Khan, W. Wang, S. So, M. A. Zondlo, E. Bou-Zeid, and G. Wysocki, “Infrared- Laser Based, Solar-Powered, Distributed Wireless Network for Monitoring Atmospheric Trace-Gases over Heterogeneous Landscapes,” Manuscript in Preparation.

Conference

[1] C. J. Smith, W. Li, S. Bai, and S. Y. Chou, "High Frequency Polarization Switching VCSEL Clock Using Subwavelength Quarter-Wave Plate," in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, OSA Technical Digest (CD) (Optical Society of America, 2009), paper CMP6. (Presentation)

[2] C. J. Smith, S. So, and G. Wysocki, "Low-Power Portable Laser Spectroscopic Sensor for Atmospheric CO₂ Monitoring," in Conference on Laser Electro-Optics: Applications, OSA Technical Digest (CD) (Optical Society of America, 2010), paper JThB4. (Presentation)

[3] Stephen So, Evan Jeng, Clinton Smith, David Krueger, and Gerard Wysocki, “Next generation infrared sensor instrumentation: remote sensing and sensor networks using the openPHOTONS repository (Proceedings Paper),” Infrared Remote Sensing and Instrumentation XVIII, Marija Strojnik; Gonzalo Paez, Editors, vol. 7808, no. 780818, 2010

[4] Clinton J. Smith, Stephen So, Amir Khan, Mark A. Zondlo, and Gerard Wysocki, “Low-power wireless trace gas sensing network (Proceedings Paper),” Sensing Technologies for Global Health, Military Medicine, Disaster Response, and Environmental Monitoring; and Biometric Technology for Human Identification VIII, Sárka O. Southern; Kevin N. Montgomery; Carl W. Taylor; Bernhard H. Weigl; B. V. K. Vijaya Kumar; Salil Prabhakar; Arun A. Ross, Editors, vol. 8029, no. 80291G, 2011 (Poster)

[5] Michal Nikodem, Clinton Smith, Damien Weidmann, and Gerard Wysocki, “Remote mid-infrared sensing using chirped laser dispersion spectroscopy (Proceedings Paper),” Advanced Environmental, Chemical, and Biological Sensing Technologies VIII, Tuan Vo-Dinh; Robert A. Lieberman; Günter Gauglitz, Editors, vol 8024, no. 80240F, 2011

[6] C. J. Smith, S. So, A. Khan, M. A. Zondlo, and G. Wysocki, "Temperature Impact on the Long-Term Stability of a Portable Laser Spectroscopic CO₂ Sensor," in Quantum Electronics and Laser Science Conference, OSA Technical Digest (CD) (Optical Society of America, 2011), paper JWA117. (Poster)

[7] C. J. Smith, W. Li, G. Wysocki, and S. Y. Chou, "Drive-Current Tuning of Self-Oscillation Frequency of External Cavity VCSEL," in CLEO:2011 - Laser Applications to Photonic Applications, OSA Technical Digest (CD) (Optical Society of America, 2011), paper CTuP3. (Presentation)

[8] M. Nikodem, C. J. Smith, D. Weidmann, and G. Wysocki, "Chirped Laser Dispersion Spectroscopy with baseline-free 2nd harmonic detection," in CLEO:2011 - Laser Applications to Photonic Applications, OSA Technical Digest (CD) (Optical Society of America, 2011), paper CThT4.

[9] C.J. Smith, S. So, and G. Wysocki, “Wireless sensor network for environmental CO₂ monitoring,” in Field Laser Applications in Industry and Research (FLAIR), 2011. (Poster)

[10] D. Richter, S. Meyer, S.M. Spuler, C.J. Smith, S. So, and G. Wysocki, “Ultra compact VCSEL based CO₂ spectrometer for flux measurements,” in Field Laser Applications in Industry and Research (FLAIR), 2011.

[11] M. Nikodem, C. Smith, D. Weidmann, and G. Wysocki, “Open-path remote sensing of nitrous oxide using chirped laser dispersion spectroscopy,” in Field Laser Applications in Industry and Research (FLAIR), 2011.

[12] W. Wang, C. Smith, S. So, E. Bou-Zeid, and G. Wysocki, "Wireless Sensor Networks for Monitoring of Atmospheric Chemicals," in Renewable Energy and the Environment, OSA Technical Digest (CD) (Optical Society of America, 2011), paper JWE19.

[13] C. J. Smith, M. A. Khan, M. A. Zondlo, and G. Wysocki, "In-Line Reference Cell for Real-Time Calibration of Laser Absorption Spectrometers," in CLEO: Science and Innovations, OSA Technical Digest (online) (Optical Society of America, 2012), paper CW3B.1. (Presentation)

[14] C. Smith, W. Wang, and G. Wysocki, "A Rotational Sample/Reference Cell for High-accuracy Real-time Spectroscopic Trace-gas Sensing," in CLEO: 2013, OSA Technical Digest (online) (Optical Society of America, 2013), paper CW1L.3.

[15] C. J. Smith, R. Shankar, M. B. Frish, and M. Loncar, “N₂O Sensing Using a QCL-Interrogated Silicon-on-Sapphire Ring Resonator,” in Field Laser Applications in Industry and Research (FLAIR), 2014.

[16] C. J. Smith, R. Shankar, M. B. Frish, M. Loncar, and M. G. Allen, "QCL-Coupled Silicon-on-Sapphire Ring Resonators as Gas Sensors," in International Quantum Cascade Lasers School & Workshop (IQCLSW), 2014.

[17] Krishnan R. Parameswaran, Clinton J. Smith, Kristin L. Galbally-Kinney, and William J. Kessler, "Compact Hydrogen Peroxide Sensor for Sterilization Cycle Monitoring," in International Forum Process Analytical Technology (IFPAC), 2015.

[18] Mickey Frish, Clinton Smith, Richard Wainner, Gerrit Goodman, James Rutherford, Steve Chancey, and Paul Wehnert, “Laser-Based Standoff Methane Sensors for Enhancing Coal Miner Safety," in Pittcon 2015, paper 130-2.