A new THz-to-millimeter-wave source

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: F33615-02-M-5421
Agency Tracking Number: 02-0037
Amount: $70,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2002
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
1540 Nettleship Street, Suite 14, Fayetteville, AR, 72701
DUNS: 107973302
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Wei Shi
 Senior Optical Engineer
 (501) 521-3934
Business Contact
 Yujie Ding
Title: President
Phone: (501) 521-3934
Email: yujied@hotmail.com
Research Institution
"This SBIR Phase I project focuses on the implementation of a new THz module that can emit coherent and tunable THz waves. Recently, coherent THz radiation was generated at room temperature by PI, with a tuning range of 56.8-1618 ¿m (5.27 - 0.18 THz), inGaSe based on difference-frequency generation. The peak THz power can be as high as 69.4 W at 196 ¿m. The corresponding photon conversion efficiency reaches 3.3%. The objectives for Phase I include optimized design and detailed testing of the THz module.This module consists of all the optics, opto-mechanical components with knobs for adjustments, a mounted GaSe crystal, and a GaAs etalon for THz wavelength measurements. This module can be initially pumped by two laser beams, e.g., Nd:YAG laser and MOPOsystem.Presently, electro-optic sampling becomes a widely-accepted technique in the THz domain. However, for some applications such as the identifications of substances by the absorption of THz waves, there is a critical need for the development of a coherentquasi-CW THz source. To be usable for this application, the THz radiation should have high coherence, a narrow linewidth, a high power, and a low divergence angle. Such a type of the instrument can be eventually used for target acquisition as well astracking and pointing. It also has applications in pollution monitoring, identifying toxic chemicals, remote sensing, molecular spectroscopy, bio-medical imaging, and security screening. I

* Information listed above is at the time of submission. *

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