Embedded-Optical-Fiber, Near-Infrared Fluorosensor for NDE of Aerospace Systems

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$600,000.00
Award Year:
1995
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
22729
Agency Tracking Number:
22729
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1406 Smith Road, Suite A, Austin, TX, 78721
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Robert C. Chin
(512) 385-0318
Business Contact:
() -
Research Institute:
n/a
Abstract
Conventional fiber optic fluorosensors absorb and re-emit in the UV/VIS spectral range. The unavailability of UV/VIS light sources makes these fluorosensors prohibitively costly and unreliable. Systems & Processes Engineering Corporation (SPEC) proposes to develop an embedded fiber optic near-infrared (NIR) fluorosensor which uses reliable and inexpensive diode lasers as light sources. The embedded fiber optic fluorosensor will combine (1) Phase Resolved Fluorescence Spectroscopy (PRFS) to exploit fluorescence lifetime which is more sensitive to fluorescence changes induced by cladding immobilized, NIR fluorescent molecules complexed with metal ions produced by airframe corrosion, and (2) SPEC's digital optical phase-locked-loop (DOPLL) for strain, stress and vibration measurements. The system when integrated into the airframe will provide real time monitoring of the health of bonding joints and critical failure locations (e.g. fasteners, bolts, composite joints, welds) on an aircraft by monitoring corrosion by-products (metal ions). The envisioned system will feature the following technologies: NIR absorbing probe molecules; optical cladding immobilized with fluorescent dye molecules; fluorescence lifetime measured by PRFS; strain, stress, and vibration measurement by DOPLL; and optoelectronic miniaturization technology. The resulting system will be lOO times smaller and faster, and 1/4 the cost of existing commercial fluorosensors.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government