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US 11,614,580 B2Granted
Bragg grating based optical fiber sensor which is capable of measuring inflection point vector of chiral motion and manufacturing method thereof
AssigneeUIF (University Industry Foundation), Yonsei University
InventorsJun Ho Choi, Song Bi Lee, Song A Choi
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Abstract
The exemplary embodiments provide an optical fiber sensor and a vector measuring device which measure a motion of a subject using a double Bragg grating formed in a core with a helical structure and measure a chiral motion inflection point vector.
Claims16
A method for manufacturing an optical fiber sensor, the method comprising:
- forming three or more basic Bragg gratings in a core;
- and
- forming a plurality of sub Bragg grating between two continuous basic Bragg gratings in the core,
- wherein in the forming of the three or more basic Bragg gratings, the basic Bragg gratings are formed in the core with a long period that includes a plurality of sections having varying lengths, and
- wherein in the forming of the plurality of sub Bragg gratings, the sub Bragg gratings are formed with a short period of a uniform length, and the short period is shorter than the lengths of the plurality of sections.
2 more elements
An optical fiber sensor, comprising:
- a core in which a Bragg grating is formed;
- and
- a cladding which surrounds the core,
- wherein the Bragg grating includes (i) three or more basic Bragg gratings and (ii) a plurality of sub Bragg gratings located between two continuous basic Bragg gratings,
- wherein the three or more basic Bragg gratings are formed in the core with a long period that includes a plurality of sections having varying lengths, and
- wherein the plurality of sub Bragg gratings are formed between the two continuous basic Bragg gratings with a short period of a uniform length, and the short period is shorter than the lengths of the plurality of sections.
3 more elements
A vector measuring device comprising:
- an optical fiber sensor;
- a wavelength measuring unit which transmits an optical signal to the optical fiber sensor and receives an optical signal with a changed wavelength;
- and
- a vector processor which analyzes the optical signal with the changed wavelength to output a vector for a motion of a subject,
- wherein the optical fiber sensor includes:
- a core in which a Bragg grating is formed;
- and
- a cladding which surrounds the core,
- wherein the Bragg grating includes (i) three or more basic Bragg gratings and (ii) a plurality of sub Bragg gratings located between two continuous basic Bragg gratings,
- wherein the three or more basic Bragg gratings are formed in the core with a long period that includes a plurality of sections having varying lengths, and
- wherein the plurality of sub Bragg gratings are formed between the two continuous basic Bragg gratings with a short period of a uniform length, and the short period is shorter than the lengths of the plurality of sections.
8 more elements
Dependencies are inferred from the claim text.