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Proceedings Paper

Compact fiber-pigtailed terahertz imaging system
Author(s): James Van Rudd; David A. Zimdars; Matthew W. Warmuth
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Paper Abstract

Terahertz imaging has been shown to be a powerful tool for analyzing a variety of materials. From the amount of water in a leaf over time to looking at the spectroscopic species in a flame, this technique shows great potential for commercial applications. However, in order to work in a commercial environment, the present free-space optical systems must be abandoned in favor of fiber-optic delivery. To this end, we have developed a compact, fiber-pigtailed terahertz imaging system that utilizes a hermetically sealed, photoconductive, transmitter and receiver. The receiver uses an integrated amplifier to obtain a 1000:1 S/N with only 1 mW of power on both the transmitter and receiver and with a one second integration time. This system has usable energy extending from 0.04 to 2 THz and has both a rapid (20 Hz) scanner for short, 40-ps, scans as well as a long rail for scans up to 1 ns. The system hardware is contained in a 1.5 cu. ft. box with fibers feeding both the transceiver units. These units can be configured into either a transmission or reflection mode depending on the user's application. An advanced software system controls the hardware, collects the data, and does image processing.

Paper Details

Date Published: 23 May 2000
PDF: 9 pages
Proc. SPIE 3934, Commercial and Biomedical Applications of Ultrafast Lasers II, (23 May 2000); doi: 10.1117/12.386344
Show Author Affiliations
James Van Rudd, Picometrix, Inc. (United States)
David A. Zimdars, Picometrix, Inc. (United States)
Matthew W. Warmuth, Picometrix, Inc. (United States)

Published in SPIE Proceedings Vol. 3934:
Commercial and Biomedical Applications of Ultrafast Lasers II
Joseph Neev; Murray K. Reed, Editor(s)

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