Journal Papers
J. Xu, G. Pickrell, X. Wang, W. Peng, K. Cooper, and A. Wang, "A Novel Temperatrure-Insensitive Optical Fiber Pressure Sensor for Harsh Environments," Photonics Technology Letters, 17 [4] 870-72 (April 2005).

Y. Zhang, G. Pickrell, B. Qi, and A. Wang, “Single-Crystal Sapphire-Based Optical High Temperature Sensor For Harsh
Environments,” Optical Engineering, 43 [1] 157-64, July 2004.

W. Peng, G.R. Pickrell, J. Xu, Z. Huang, D.W. Kim, B. Qi, A. Wang, “Self-compensating fiber optic flow sensor system and its field application,” Applied Optics, 43 [8] 1752-1760 (2004).

G. Pickrell, D. Kominsky, R. Stolen, F. Ellis, J. Kim, A. Saffaai-Jazi, and A. Wang, “Microstructural Analysis of Random Hole Optical Fibers," Photonics Technology Letters, 16 [2] 491-93 (2004).

Z. Huang, G. Pickrell, and A. Wang, “Penetration Rate of Water in Sapphire and Silica Optical Fibers at Elevated Temperature and Pressure,” Optical Engineering Letters, 43 [6] 1272-73, June 2004.

G. Pickrell, W. Peng, and A. Wang, "Random-hole Fiber evanescent Wave Gas Sensing," Optics Letters, 29 [13] 1476-78, July 2004.

X. Chen, Y. Zhang, G. Pickrell, and J. Antony, “Experimental Design in Fiber Optic Sensor Development.” International Journal of Productivity and Performance Management, 53 [8] September 2004.

B. Yu, G. Pickrell, and A. Wang,“Thermally Tunable Extrinsinc Fabry-Perot Filter,” Photonics Technology Letters, 16 [10] 2296-98, October 2004.

W. Peng, Gary Pickrell, F. Shen and Anbo Wang, “Experimental Investigation of Optical Waveguide-Based Multigas Sensing,” Photonics Technology Letters, 16 [10] 2317-19, October 2004.

J. Xu, G. Pickrell, X. Wang, W. Peng, K. Cooper, and A. Wang, “A Novel Temperature-Insensitive Optical Fiber Pressure Sensor For Harsh Environments,” Photonics Technology Letters, 17 [4] 870-72, October 2004.

M. Han, Y. Zhang, F. Shen, G. Pickrell, and A. Wang,“Signal Processing Algorithm for White-light Single Mode Optical Fiber Extrinsic Fabry-Perot Interferometric Sensors,” Optics Letters, 29 [15] 1736-38, August 2004.

H. Xiao, J. Deng, G. Pickrell, R.G. May, and A. Wang, “Single Crystal Sapphire Fiber-Based Strain Sensor For High Temperature Applications," Journal of Lightwave Technology, 21 [10], 2276-83 (2003).

P. Zhang, H.H. Cerecedo-Núñez, B. Qi, G. Pickrell, and Anbo Wang, "Optical Time-Domain Reflectometry Interrogation of Multiplexed Low-Reflectance Bragg Grating Based Sensor System," Journal of Optical Engineering, 42 [6] 1597-1603, June 2003.

D. Kominsky, G. Pickrell and R. Stolen, "Fabrication of Random Hole Optical Fibers," Journal of Optics Letters, 28 [16] 1409-11, August 2003.

B. Qi, G. Pickrell, J. Xu, P. Zhang, Y. Duan, W. Peng, Z. Huang, R.G. May, and A. Wang, “Novel Data Processing Techniques for Dispersive White Light Interferometer,” Optical Engineering, 42 [11] 3165-71 (2003).

Conference Proceedings
Z. Huang, G. Pickrell, J. Xu, Y. Wang, Y. Zhang, A. Wang, “Sapphire Temperature Sensor Coal Gasifier Field Test,” Proceedings, SPIE, Harsh Environment Sensing, Vol. 5590, 27-36, December 2004.

Y. Zu, G. Pickrell, X. Wang, J. Xu, B. Yu, M. Han, K. Cooper, A. Wang, A. Ringshia, W. Ng, “Miniature Fiber–optic Pressure Sensor for Turbine Engine,” Proceedings, SPIE, Harsh Environment Sensing, Vol. 5590, 11-18, December 2004.

F. Shen, W. Peng, K. Cooper, G. Pickrell, and A. Wang, “UV-induced Intrinsic Fabry-Perot Interferometric Fiber Sensors,” Proceedings, SPIE, Harsh Environment Sensing, Vol. 5590, 47-56, December 2004.

Y. Zu, Z. Huang, M. Han, F. Shen, G. Pickrell, and A. Wang,“Fiber-optic High-Temperature Thermometer Using Sapphire Fiber,” Proceedings, SPIE, Harsh Environment Sensing, Vol. 5590, 19-26, December 2004.

J. Xu, G. Pickrell, B. Yu, M. Han, Y. Zhu, X. Wang, K.L. Cooper, and A. Wang, “Epoxy-free High Temperature Fiber Optic Pressure Sensors for Gas Turbine Engine Applications," Proceedings, SPIE, Harsh Environment Sensing, Vol. 5590, 1-10, December 2004.

Z. Huang, J. Deng, W. Peng, G. Pickrell, and A. Wang, “High-Pressure Fiber Optic Acoustic Sensor,” Proceedings, SPIE, Fiber Optic Sensor Technology and Applications III, Vol. 5589, 278-86, December 2004.

W. Peng, G. Pickrell, F. Shen, and A. Wang, “Hollow Fiber Optic Waveguide Gas Sensor for Simultaneous Monitoring of Multiple Gas Species,” Proceedings, SPIE, Fiber Optic Sensor Technology and Applications III, Vol. 5589, 1-7, December 2004.

G. Pickrell, N. Manjooran, N. Goel, “New Fabrication Technique for Random Hole Optical Fibers,” Proceedings, SPIE, Fiber Optic Sensor Technology and Applications III, Vol. 5589, 257-65, December 2004.

G. Pickrell, J. Lyons, and J. Shaver, "Implementation of Lean Six Sigma at Moog Components Group Case Studies," Proceedings, International Conference on Six Sigma, 83-96, Glasgow, Scotland, December 2004.

G. Pickrell, et. al., “Colloidal quantum dots entrained in microstructured optical fibers," Proceedings, SPIE, Fiber Lasers, Technology, Systems and Applications, Vol. 5335, 258-65, June 2004.

B. Yu, G. Pickrell, and A. Wang, “Grating Assisted Operating-Point Tuning for Fiber Optic Fabry Perot Interferometric Sensors," Proceedings, SPIE, Industrial and Highway Sensors Technology, Vol. 5272, 41-48, 2004.

B. Yu, A. Wang, G. Pickrell, "Analysis of White-light Fiber Fabry-Perot Interferometric Sensors," Proceedings, SPIE, Fiber Optic Sensor Technology and Applications III, Vol. 5589, 120-131, 2004.

G. Pickrell, Y. Zhang, Z. Dicic, and A. Wang, “Single Crystal Sapphire Temperature Measurement System for Use in Coal Gasifiers," Proceedings, 20th Annual Pittsburgh Coal Conference, Pittsburgh, Pa., September, 2003.

W. Peng, G.R. Pickrell, A. Wang, “Cubic Zirconia-based High Temperature Fiber Optic Pressure Sensor,” Proceedings, SPIE, Industrial and Highway Sensors Technology, Vol. 5272, 216-222, 2003.

W. Peng, G.R. Pickrell, J. Xu, Z. Huang, D. Woong, B. Qi, and A. Wang, “Novel Single-phase Fiber Optic Flow Sensor System,” Proceedings, SPIE, Industrial and Highway Sensors Technology, Vol. 5272, 223-229 (2003).

G.R. Pickrell, D. Kominsky, and R. Stolen, “Random Hole Optical Fibers”, Proceedings, SPIE, Industrial and Highway Sensors Technology, Vol. 5272, pp. 207-15, 2003.

A. Wang, P. Zhang, K. Cooper, and G. Pickrell, “Highly Multiplexed Fiber Optic Sensors for Civil Infrastructure Monitoring”, Proceedings, International Workshop on Structural Health Monitoring, September 15-17th, Stanford, Ca., 2003.

W. Peng, G.R. Pickrell, B. Qi, A. Wang, “Investigation on Cubic Zirconia-based Fiber Optic Sensor Pressure for High Temperature Application,” Second IEEE International Conference on Sensors, 2 [1] 713-17 (2003).

Y. Zhang, G. Pickrell, B. Qi, R. May, A. Wang, "BPDI Based Optical Temperature Sensors for Real-Time High Temperature Measurements of the Coal Gasification Process," Proceedings, SPIE Advanced Sensor Systems and Applications, Photonics Asia, Vol. 4920, 9-15 (2002).

G. Pickrell, Y. Zhang and A. Wang, "Development of a Temperature Measurement System for Use in Coal Gasifiers," Proceedings, 19th Annual Pittsburgh Coal Conference, Pittsburgh, Pa., September 24-27, 2002.

J. Xu, G. Pickrell, H. Zhengyu, B. Qi, P. Zhang, W. Pung, R. May, and A. Wang, "Double Tubing Encapsulated Fiber Optic Temperature Sensor," Proceedings, 8th Symposium on Temperature: Its Measurement and Application in Science and Industry Conference, Chicago, Illinois, October 21-25, 2002.

Y. Zhang, G. Pickrell, B. Qi, R.G. May, A. Wang, "Single Crystal Sapphire High Temperature Measurement Instrument for Coal Gasification," Proceedings, 8th Symposium on Temperature: Its Measurement and Application in Science and Industry Conference, Chicago, Illinois, October 21-25, 2002.

G.R. Pickrell, D. Kominski, R.H. Stolen, A. Safaai-Jazi, R.G. May, and A. Wang, "Novel Techniques for the Fabrication of Holey Optical Fibers," Proceedings, SPIE, Photonics Boston, Vol. 4578, 271-82, 2001.

G.R. Pickrell, Y. Duan, B. Qi, R.G. May, and A. Wang, "Investigation of the Diffusion of Water in Optical Fibers at Elevated Temperature and Pressure," Proceedings, SPIE, Photonics Boston, Vol. 4578, 239-50, 2001.

Y. Zhang, B. Qi, Y. Duan, G.R. Pickrell, R.G. May, and A. Wang, "Single Crystal Sapphire High Temperature Sensing Based on Broadband Polarized Light Interferometry," Proceedings, SPIE, Photonics Boston, Vol. 4578, 191-97, 2001.

B. Qi, G.R. Pickrell, P. Zhang, Y. Duan, W. Peng, J. Xu, Z. Huang, R.G. May, and A. Wang, "Fiber Optic Pressure and Temperature Sensors for Oil Down Hole Application," Proceedings, SPIE, Photonics Boston, Vol. 4578, 182-90, 2001.

A. Roberts, R.G. May, G.R. Pickrell, and A. Wang, "High Temperature Fiber Optic Pressure Sensor Instsrumentaiton for Jet Engines," Proceedings, SPIE, Photonics Boston, Vol. 4578, 210-19, 2001.

Y. Zhang, G. Pickrell, B. Qi, R. May, and A. Wang, "Single-Crystal Sapphire High Temperature Sensing Based on Broadband Polarimetric Interferometer," Proceedings, ISA/IEEE Sensors for Industry Conference (SIcon01), Rosemont, Illinois, 303-307, November 2001.

G.R. Pickrell, Y. Duan, B. Qi, R.G. May, and A. Wang, “Diffusion Of Water In Optical Fibers At Elevated Temperature And Pressure,” Proceedings, SPIE, Fiber Optic Sensor Technology and Applications, Vol. 4578, 239-50, 2001.

A. Roberts, R.G. May, G.R. Pickrell, and A. Wang, “High Temperature Optical Fiber Instrumentation for Gas Flow Monitoring in Gas Turbine Engines.” Proceedings, SPIE, Fiber Optic Sensor Technology and Applications, Vol. 4578, 210-19 (2001).

Y. Zhang, G. Pickrell, B. Qi, R. May, and A. Wang, “High Temperature Sensing Based On Broadband Polarimetric Interferometer," Proceedings, ISA/IEEE Sensors for Industry Conference (SIcon01), Rosemont, Illinois, 303-307, November, 2001.

A. Wang, H. Xiao, R. May, J. Wang, W. Zhao, J. Deng, P. Zhang, and G. Pickrell, “Optical Fiber Sensors for Harsh Environments,” Proceedings, SPIE, International Conference on Sensors and Control Techniques (ICSC 2000), Vol. 4077, 2-6 (2000).

Invited Presentations & Papers
G. Pickrell, K. Cooper, and A. Wang, "Photonic Sensor Research," Invited Paper, National Science Foundation - European Science Foundation joint workshop, "Advancing Technological Frontiers for Feasibility of Ageless Structures," Strasbourg, France, October 2-4, 2003.

G. Pickrell and A. Wang, "Some Recent Advances in Fiber Optic Temperature and Pressure Sensors," Invited Paper, 2003 NCSL International Workshop and Symposium, Tampa, Fla., August 17-23, 2003.

G. Pickrell, R. May, and A. Wang, "Current Research Focus Areas in Fiber Optic Sensors at VTPL," Invited Presentation, International Workshop on Borehole Instrumentation and Near Source Seismology, Tsukuba, Japan, March 13-16, 2001.

A. Wang and G. Pickrell, "Optical Sensor Research at Virginia Tech," Invited Paper, SPIE, Proceedings, Vol. 4578, 1-7, Boston, Mass., October 28 - November 2, 2001.

Submitted Presentations
N. Manjooran, G. Pickrell, and W. Sigmund, “Development of a Nano Sized SiC Based Liquid Toner for Electrophotographic Solid Freeform Fabrication,” poster presentation, ACERS conference, Baltimore, Md., April 2005.

A. Ringshia, H. Hill, J. Xu, Y. Zhu, X. Wang, G. Pickrell, A. Wang, “Testing of Fiber Optic Pressure Sensors in Aircraft Engines, presented at the 18th annual review meeting of the Turbomachinery and Propulsion Research, 2005.

X. Wang, J. Xu, Y Zhu, B. Yu, M. Han, K. Cooper, G. Pickrell, A. Wang, “An Optical Fiber Tip Sensor for Pressure Measurement in High Temperature Environments,” poster presentation, Optics in the Southeast sponsored by OSA, Charlotte, N.C., November 4-5, 2004.

B. Yu, G. Pickrell, A.Wang, “Thermally Tunable Extrinsic Fabry-Perot Filter for White Light Interferometry,” poster presentation, Frontiers in Optics, 88th annual meeting of OSA, October 10-14, 2004.

Z. Huang, J. Deng, W. Peng, G. Pickrell, A. Wang, “High Pressure Fiber Optic Acoustic Sensor,” poster presentation, SPIE Optics East Fiber Optic Sensor Technology, Philadelphia, Pa., October 25-29, 2004.

Software and Patents
G.R. Pickrell, K.R. Butcher, and C-L Lin, "Porous Articles and Method for Manufacturing Thereof," U.S. Patent 6773825, Issued August 10, 2004.

G.R. Pickrell, K.R. Butcher, and C-L Lin, "Improved Porous Articles and Method for Manufacturing Thereof," U.S. Patent 6592787, Issued July 15, 2003.

G.R. Pickrell and K.R. Butcher, "Method of Manufacture of Porous Ceramic Articles," U.s. Patent 6210612, Issued April 3, 2001

G.R. Pickrell and K.R. Butcher, "Porous Ceramic Articles," U.S. Patent 6235665, Issued May 22, 2001

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