Alignment Free Single-Ended Optical Probe and Methods for Spectroscopic Measurements in a Gas Turbine Engine
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United States of America Patent
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Issued Date -
Jul 8, 2010
app pub date -
Jan 26, 2009
filing date -
Jan 7, 2009
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Abandoned
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Abstract
A method of measuring the combustion property in a measurement volume within a casing defined in part by a casing wall. The method includes providing a port in the chamber wall. Also provided is a fiber assembly comprising a single mode transmit core surrounded by a multimode receive core means. The fiber assembly is operatively coupled to the port to provide optical communication between the fiber assembly and measurement volume. A detection beam capable of detecting a select combustion property is transmitted from the single mode fiber and reflected off a reflection surface within the chamber, the reflection surface being configured to reflect and optically couple at least a portion of the detection beam to the multimode receive core means. The detection beam optically coupled to the multimode receive core means is then measured.
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