High-Temperature Fiber Grating Technologies for In Situ Interrogation of Damage States in Structural Materials

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-05-M-5215
Agency Tracking Number: F051-136-0054
Amount: $100,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2005
Solicitation Year: 2005
Solicitation Topic Code: AF05-136
Solicitation Number: 2005.1
Small Business Information
650 Vaqueros Ave., Suite A, Sunnyvale, CA, 94085
DUNS: 877452664
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Behzad Moslehi
 (408) 328-8610
Business Contact
 Behzad Moslehi
Title: CEO/CTO
Phone: (408) 328-8648
Email: bm@ifos.com
Research Institution
Fiber optic gratings are critical components for advanced multi-point sensor systems that can be used to assess the remaining lifetime of components in highly complex mechanical systems. . Standard gratings, however, degrade at temperatures below the melting point of glass. Thus, the gratings lose their sensing capability in thermally harsh environments. To respond to the Air Force's need for in situ harsh environment sensing technologies to interrogate material and damage states for engine, airframe, and hot structure components, Intelligent Fiber Optic Systems (IFOS) is proposing a grating writing method to significantly extend the operating range of grating-based sensors to temperatures close to the melting point of glass. IFOS will develop a robust high-temperature grating fabrication process and design a multi-point sensor system to demonstrate survivability and operation at high temperatures. The system, which will include a compact interrogator, can simultaneously measure strain, vibration, acceleration, and temperature. The system can be deployed for physical as well as chemical and bio-agents sensing, and is thus applicable to gases in combustion environments and high temperature spectroscopy. It allows for distributed and remote measurement in harsh environments. Sensor readout is accomplished at extremely high speed and high resolution using secure fiber optic links.

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

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