NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Micro-optical Distributed Sensors for Aero Propulsion ApplicationsThe objective of this research is to develop micro-opto-mechanical system (MOMS)-based sensors for time- and space-resolved measurements of flow properties in aerodynamics applications. The measurement technique we propose uses optical resonances in dielectric micro-spheres that can be excited by radiation tunneling from optical fibers. It exploits the tunneling-induced and morphology-dependent shifts in the resonant frequencies. The shift in the resonant frequency is dependent on the size, shape, and index of refraction of the micro-sphere. A physical change in the environment surrounding a micro-bead can change one or more of these properties of the sphere thereby causing a shift in frequency of resonance. The change of the resonance frequency can be detected with high resolution by scanning a frequency-tunable laser that is coupled into the fiber and observing the transmission spectrum at the output of the fiber. It is expected that, in the future, the measurement concept will lead to a system of distributed micro-sensors providing spatial data resolved in time and space. The present project focuses on the development and demonstration of temperature sensors using the morphology-dependent optical resonances although in the latter part of the work, we will also develop a pressure sensor. During the period covered in this report, the optical and electronic equipment necessary for the experimental work was assembled and the experimental setup was designed for the single sensor temperature measurements. Software was developed for real-time tracking of the optical resonance shifts. Some preliminary experiments were also carried out to detect temperature using a single bead in a water bath.
Document ID
20030016602
Acquisition Source
Glenn Research Center
Document Type
Contractor Report (CR)
Authors
Arnold, S. (Polytechnic Univ. Brooklyn, NY United States)
Otugen, V. (Polytechnic Univ. Brooklyn, NY United States)
Seasholtz, Richard G.
Date Acquired
September 7, 2013
Publication Date
January 1, 2003
Subject Category
Instrumentation And Photography
Report/Patent Number
E-13753
NASA/CR-2003-212100
NAS 1.26:212100
Funding Number(s)
CONTRACT_GRANT: NAG3-2679
PROJECT: RTOP 708-87-23
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available