Demonstration of Passive W-Band Millimeter Wave Imaging Using Optical Upconversion Detection Methodology with Applications
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Millimeter wave (mmW) imaging has enjoyed a measure of success due to the unique properties of imaging in this spectral region, some of which are still being discovered. For example, a key advantage of mmW imaging is the ability to penetrate through various atmospheric obscurants, including fog, dust, sand, and smoke, due to its longer wavelengths as compared to visible or infrared imaging. Various methods of imaging with mmW energy exist, such as direct detection, downconversion, and upconversion, where this manuscript focuses on the latter. Until now, passive imaging using an optical upconversion method was limited to Q-band frequencies due to the lack of commercially available parts, namely a sufficiently high frequency optical modulator. To overcome this limitation, a custom-built modulator using in-house fabrication facilities was realized to allow imaging within the W-band frequency range (75–110 GHz). Therefore, in this manuscript we report new results of passive imaging in the W-band frequency range using a unique optical upconversion technique, where the higher frequency operation allows for greater detail in the imagery thus collected.
KeywordsMillimeter wave Upconversion Passive imaging Modulator
The author wishes to thank the Office of Naval Research C4ISR Applications Division for generously funding this research.
- 1.J. P. Samluk, C. A. Schuetz, E. L. Stein, Jr., A. Robbins, D. G. Mackrides, R. D. Martin, J. Wilson, C. Chen, T. Dillon, and D. W. Prather, “Q-band Millimeter Wave Imaging in the Far-Field Enabled by Optical Upconversion Methodology,” J. Infrared. Millim. Terahertz Waves, 33(1), 54-66 (2012).CrossRefGoogle Scholar
- 3.E. Desurvire, Erbium-Doped Fiber Amplifiers: Principles and Applications, J. Wiley & Sons, New York (1994).Google Scholar
- 4.C. A. Schuetz, Optical Techniques for Millimeter-Wave Detection and Imaging, Doctoral Dissertation, University of Delaware, Newark, DE (2007).Google Scholar
- 5.J. P. Samluk, Millimeter Wave Far-Field Imaging via Optical Upconversion Techniques, Masters Thesis, University of Delaware, Newark, DE (2008).Google Scholar
- 6.F. T. Ulaby, R. K. Moore, and A. K. Fung, Microwave Remote Sensing: Active and Passive, vol. 1, Addison-Wesley, Reading, MA (1981).Google Scholar
- 9.Brijot Imaging Systems, Inc., Brijot BIS-WDS Gen2 Information Pamphlet, http://www.brijot.com.
- 12.E. J. Boettcher, K. Krapels, R. Driggers, J. Garcia, C. Schuetz, J. Samluk, L. Stein, W. Kiser, A. Visnansky, J. Grata, D. Wikner, and R. Harris, "Modeling Passive Millimeter Wave Imaging Sensor Performance for Discriminating Small Watercraft," Appl. Opt., 49(19), E58-E66 (2010).CrossRefGoogle Scholar
- 18.Joint IED Defeat Organization Technology Poster Booklet, March 2010.Google Scholar
- 19.Naval Explosive Ordinance Disposal Technology Division, Afghanistan Ordnance Identification Guide, vol. 2, Indian Head, MD (2004).Google Scholar