FIBER OPTIC SENSOR SYSTEM AND METHOD
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Dec 17, 2015
app pub date -
Jan 31, 2014
filing date -
Jan 31, 2013
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A fiber Bragg grating (FBG) is used to measure strain. An optical fiber is used with a grating that comprises periodic spatial variations with mutually different first and second spatial frequencies. The wavelength of a first and second light source is swept over a first and second wavelength range that contain first and second Bragg reflection wavelengths corresponding to first and second spatial frequencies respectively. Light from the light sources is supplied to the optical fiber and to a reference branch. The reference branch contains an interferometer and a first and second filter having a transmission or reflection peak in the first and second wavelength range respectively. Time points of first and second peaks in the reflection of the light from the first and second light source by the optical fiber or detected during said sweeping. A count is made of periods of output of the interferometer, between the time points of detection of the first and second peaks and time points of detection of peaks from the first and second filter. The strain is solved from an equation that relates the variations of the temperature and the strain as shown by the counts.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully