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A Method Based on Time-Scale Factor for Correcting the Nonlinear Frequency Sweeping in an OFDR System
- Source :
- IEEE Photonics Journal, Vol 11, Iss 3, Pp 1-8 (2019)
- Publication Year :
- 2019
- Publisher :
- IEEE, 2019.
-
Abstract
- A data processing method for correcting the frequency sweeping nonlinearity of a tunable laser in an optical frequency domain reflectometry system is presented. The proposed method calibrates the positions of all the data points by the time-scale factor determined by the zero-crossing points of the auxiliary interferometer. Then, the signal of the main interferometer is interpolated with the calibrated results. In experiments, a spatial resolution of 0.17 mm over a measurable range of 155 m has been obtained even when the optical path difference of the auxiliary interferometer is shorter than that of the main interferometer. This method could resolve the problem that measurable range is limited by the length of delay fiber in the auxiliary interferometer and significantly decrease the requirement of sampling rate.
- Subjects :
- nonlinear frequency sweep
lcsh:Applied optics. Photonics
Optical frequency domain reflectometry
Optical fiber
02 engineering and technology
01 natural sciences
Signal
law.invention
010309 optics
Optics
law
0103 physical sciences
lcsh:QC350-467
Electrical and Electronic Engineering
Reflectometry
Image resolution
spatial resolution
Optical path length
Physics
business.industry
Astrophysics::Instrumentation and Methods for Astrophysics
tunable laser source
lcsh:TA1501-1820
021001 nanoscience & nanotechnology
Scale factor
Atomic and Molecular Physics, and Optics
Interferometry
0210 nano-technology
business
Tunable laser
lcsh:Optics. Light
Subjects
Details
- Language :
- English
- ISSN :
- 19430655
- Volume :
- 11
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- IEEE Photonics Journal
- Accession number :
- edsair.doi.dedup.....a19d35599ffd79fe63541fc8eaeab473