We demonstrate an all-terahertz swept-source imaging radar operated at room temperature by using terahertz fibers for radiation delivery and with a terahertz-fiber directional coupler acting as a Michelson interferometer. By taking advantage of the high water reflection contrast in the low terahertz regime and by electrically sweeping at a high speed a terahertz source combined with a fast rotating mirror, we obtained the living object’s distance information with a high image frame rate. Our experiment showed that this fiber-based swept-source terahertz radar could be used in real time to locate concealed moving live objects with high stability.
© 2010 Optical Society of America
Medical Optics and Biotechnology
Original Manuscript: November 25, 2009
Revised Manuscript: February 6, 2010
Manuscript Accepted: February 26, 2010
Published: April 22, 2010
Yu-Wei Huang, Tzu-Fang Tseng, Chung-Chiu Kuo, Yuh-Jing Hwang, and Chi-Kuang Sun, "Fiber-based swept-source terahertz radar," Opt. Lett. 35, 1344-1346 (2010)