Terahertz Quantum Cascade Laser Based 3D Imaging

Award Information
Agency:
National Aeronautics and Space Administration
Branch:
N/A
Amount:
$750,000.00
Award Year:
2011
Program:
STTR
Phase:
Phase II
Contract:
NNX11CC66C
Agency Tracking Number:
090113
Solicitation Year:
2009
Solicitation Topic Code:
T7.01
Solicitation Number:
N/A
Small Business Information
LongWave Photonics, LLC
MA, Boston, MA, 02129-2520
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
831746628
Principal Investigator
 Alan Lee
 Principal Investigator
 (310) 845-6276
 awmlee@longwavephotonics.com
Business Contact
 Alan Lee
Title: President
Phone: (310) 845-6276
Email: awmlee@longwavephotonics.com
Research Institution
 Massachusetts Institute of Technology
 Michael Corcoran
 77 Massachusetts Avenue
Cambridge, MA, 02139-02139
 () -
 Domestic nonprofit research organization
Abstract
LongWave Photonics proposes a terahertz quantum-cascade laser based swept-source optical coherence tomography (THz SS-OCT) system for single-sided, 3D, nondestructive evaluation (NDE) of non-conductive materials. The THz SS-OCT system uses a frequency tunable QCL array to generate an interferometric signal between a reference mirror, and a sample. An algorithm is used to transform this signal into depth information of the interfaces within the sample. Phase I demonstrated the feasibility of measuring the interfaces of a dielectric on metal sample. In Phase II, we propose to demonstrate a complete scanning system for 3D imaging by upgrading the optics and mechanics. Improvements in the power levels and frequency bandwidth of the QCL source are expected to greatly improve the depth resolution and signal to noise ratio of the system. The milliwatt power levels of the QCL are expected to result in fast scan speeds. Operation of the SS-OCT system is expected to be relatively simple as the QCL is an electrically pumped, solid state source of terahertz radiation, capable of operation in a compact, high reliability crycooler as demonstrated in Phase I.

* information listed above is at the time of submission.

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