Method and system for determining grating perturbation by modulated light
AssigneeAriel Scientific Innovations Ltd.
InventorsShmuel STERNKLAR, Ziv GLASSER
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Abstract
A method of determining perturbation of a grating formed in an optical fiber, comprises: modulating and transmitting a light beam through the optical fiber, measuring at least one phase shift in a modulation of light reflected off the grating, and determining the perturbation of the grating based on the phase shift(s).
Claims45
A method of determining perturbation of a grating formed in an optical fiber, the method comprising:
- modulating and transmitting a light beam through the optical fiber, measuring at least one phase shift in a modulation of light reflected off the grating, and determining the perturbation of the grating based on said at least one phase shift.
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A system for determining perturbation of a grating formed in an optical fiber, the system comprising:
- an optical modulation system for modulating a light beam;
- an optical coupler for coupling said light beam into the optical fiber and receiving light reflected off the grating;
- and
- an optical and electrical analysis system configured for measuring at least one phase shift in a modulation of light reflected off the grating, and determining the perturbation of said grating based on said at least one phase shift.
A sensor system, comprising:
- an optical modulation system for modulating a light beam;
- an optical coupler for coupling said light beam into the optical fiber and receiving light reflected off the grating;
- and
- an optical and electrical analysis system configured for measuring at least one phase shift in a modulation of light reflected off the grating, and determining at least one physical quantity effecting a perturbation of said grating.
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A method of determining perturbation of a plurality of gratings formed in an optical fiber, the method comprising:
- modulating and transmitting a light beam through the optical fiber, wherein said modulating comprises scanning a frequency of said modulation over a plurality of modulation frequencies;
- measuring a modulation phase shift and modulation magnitude of light reflected off the grating for each modulation frequency;
- and
- determining perturbation of at least two of the gratings based on said measured modulation phase shifts and measured modulation magnitudes.
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Dependencies are inferred from the claim text.