CN103115570A - Micrometric displacement sensor based on Mach-Zehnder interferometer of telescopic pyrometric cone structure - Google Patents
Micrometric displacement sensor based on Mach-Zehnder interferometer of telescopic pyrometric cone structure Download PDFInfo
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- CN103115570A CN103115570A CN2013100192100A CN201310019210A CN103115570A CN 103115570 A CN103115570 A CN 103115570A CN 2013100192100 A CN2013100192100 A CN 2013100192100A CN 201310019210 A CN201310019210 A CN 201310019210A CN 103115570 A CN103115570 A CN 103115570A
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Abstract
The invention provides a micrometric displacement sensor based on a Mach-Zehnder interferometer of a telescopic pyrometric structure, and belongs to the field of optical fiber sensing. The micrometric displacement sensor is composed of a monomode optical fiber (1), a telescopic pyrometric cone (2) and a fiber core misalignment (3). The displacement sensor has the advantages of improving sensitivity greatly by taking advantage of the Mach-Zehnder interferometry micrometric displacement which is composed by the novel telescopic pyrometric cone structure.
Description
Technical field
The invention provides a kind of micro-displacement sensor that is consisted of by novel single-mode fiber pyrometric cone structure, belong to technical field of optical fiber sensing.
Background technology
Need to utilize micro-displacement sensor in some occasions that need accurately to measure and control displacement.Quality is light, volume is little owing to having for Fibre Optical Sensor, anti-electromagnetic interference (EMI), the advantage such as cheap, thereby more extensive than the displacement transducer application space based on electricity.Yet optical fiber micro-displacement sensor in the past adopts photonic crystal fiber or multimode optical fiber more, the high and complex manufacturing technology of its price, and sensitivity is not very good.The present invention adopts a kind of novel single-mode fiber pyrometric cone, and the dislocation of cascade fibre core forms Mach Ceng Degan and relates to the detection micrometric displacement, has effectively improved the sensitivity of micro-displacement sensor.The present invention adopts common single-mode fiber, the cost that greatly reduces micro-displacement sensor simple in structure.
Summary of the invention
The object of the invention is to provide a kind of Mach Ceng Degan based on telescope-type pyrometric cone structure to relate to highly sensitive micro-displacement sensor.The characteristics such as it is simple in structure, sensitivity is high.
The present invention is achieved through the following technical solutions:
Mach Ceng Degan based on telescope-type pyrometric cone structure relates to highly sensitive micro-displacement sensor, it is characterized in that: single-mode fiber 1, telescope-type pyrometric cone 2, fibre core dislocation 3 form; Telescope-type pyrometric cone 2 is that welding forms through optical fiber splicer on general single mode fiber 1, and fibre core dislocation 3 is that the 1 dislocation docking of two sections general single mode fibers is formed.
Described Mach Ceng Degan based on telescope-type pyrometric cone structure relates to highly sensitive micro-displacement sensor, it is characterized in that: the core diameter 9 μ m of single-mode fiber 1, cladding diameter 125 μ m.
Described Mach Ceng Degan based on telescope-type pyrometric cone structure relates to highly sensitive micro-displacement sensor, and it is characterized in that: the diameter range of telescope-type pyrometric cone 2 is 80～100 μ m, and length range is 95～120 μ m.
Described Mach Ceng Degan based on telescope-type pyrometric cone structure relates to highly sensitive micro-displacement sensor, it is characterized in that: telescope-type pyrometric cone 2 is 1～2cm with the distance range of fibre core dislocation 3.
Principle of work of the present invention is: propagated in single-mode fiber by the light that wideband light source sends, when the telescope-type pyrometric cone, covering is advanced in the small part optically-coupled, and most of light is still stayed in fibre core, and the luminous energy that enters in covering transmits very short distance in covering, during through the fibre core dislocation, light in covering is coupled in fibre core again, and is different from the refractive index of transmitting in fibre core because light transmits in covering, and produce phase differential, and then can interfere, consist of Mach-Zehnder interferometer.The degree difference of dislocation causes covering different with light relative intensity in fibre core, interference strength so can change.
The invention has the beneficial effects as follows: utilize novel pyrometric cone structure measurement micrometric displacement on general single mode fiber, cost, simple for production, sensitivity significantly improves.
Description of drawings
The Mach Ceng Degan that Fig. 1 is based on telescope-type pyrometric cone structure relates to highly sensitive micro-displacement sensor schematic diagram;
Fig. 2 is transmitted light spectrogram in different micrometric displacement situations;
The Mach Ceng Degan that Fig. 3 is based on telescope-type pyrometric cone structure relates to the temperature error figure of highly sensitive micro-displacement sensor;
Embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment:
Referring to accompanying drawing 1, relate to highly sensitive micro-displacement sensor based on the Mach Ceng Degan of telescope-type pyrometric cone structure, formed by single-mode fiber 1, telescope-type pyrometric cone 2, fibre core dislocation 3; Telescope-type pyrometric cone 2 is that welding forms through optical fiber splicer on general single mode fiber 1, its parameter is that overlapping range is 7～12 μ m, and discharge power is standard+2bit, and the section interval is 10～12 μ m, discharge time, scope was 2000～2500ms, and the taper length scope is 16～20 μ m.Fibre core dislocation 3 is that the 1 dislocation docking of two sections general single mode fibers is formed.
Fig. 2 is transmitted light spectrogram in different micrometric displacement situations.Micrometric displacement is not had interference during to 12 μ m by 0 μ m, displacement occurs interference fringe by 12 μ m during to 26 μ m, and the interference fringe contrast is maximum when 26 μ m.At first, micrometric displacement, misplaces less in 12 μ m at 0 μ m, and in fibre core, light intensity is far longer than light intensity in covering, and visibility of interference fringes is minimum, therefore can't see interference fringe; Increase along with micrometric displacement, the light that is coupled into dislocation end fibre core by the pyrometric cone fibre core is fewer and feweri, hold the light of fibre core more and more and be coupled into dislocation by covering, both intensity is more and more approaching, visibility of interference fringes increases gradually, to 26 μ m places, both light intensity is the most close, so visibility of interference fringes is maximum.
The Mach Ceng Degan that Fig. 3 is based on telescope-type pyrometric cone structure relates to the temperature error figure of highly sensitive micro-displacement sensor.When the experimental selection displacement is 20 μ m place, temperature is increased to the transmission spectrum of 80C by 20C.Its temperature error is 0.023dB/ ℃.For sensor, the impact of temperature variation almost can be ignored.
Claims (4)
1. the Mach Ceng Degan based on telescope-type pyrometric cone structure relates to highly sensitive micro-displacement sensor, it is characterized in that: be comprised of single-mode fiber (1), telescope-type pyrometric cone (2), fibre core dislocation (3); Telescope-type pyrometric cone (2) is to form in the welding of the upper process of general single mode fiber (1) optical fiber splicer, and fibre core dislocation (3) is that two sections general single mode fibers (1) dislocation docking is formed.
2. the Mach Ceng Degan based on telescope-type pyrometric cone structure according to claim 1 relates to highly sensitive micro-displacement sensor, it is characterized in that: the core diameter 9 μ m of single-mode fiber (1), cladding diameter 125 μ m.
3. the Mach Ceng Degan based on telescope-type pyrometric cone structure according to claim 1 relates to highly sensitive micro-displacement sensor, and it is characterized in that: the diameter range of telescope-type pyrometric cone (2) is 80～100 μ m, and length range is 95～120 μ m.
4. the Mach Ceng Degan based on telescope-type pyrometric cone structure according to claim 1 relates to highly sensitive micro-displacement sensor, and it is characterized in that: telescope-type pyrometric cone (2) is 1～2cm with the distance range of fibre core dislocation (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310019210.0A CN103115570B (en) | 2013-01-17 | 2013-01-17 | Based on the Mach-Zahnder interference micrometric displacement sensor of telescope-type pyrometric cone structure |
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| CN201310019210.0A CN103115570B (en) | 2013-01-17 | 2013-01-17 | Based on the Mach-Zahnder interference micrometric displacement sensor of telescope-type pyrometric cone structure |
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| CN103115570A true CN103115570A (en) | 2013-05-22 |
| CN103115570B CN103115570B (en) | 2015-09-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267999A (en) * | 2013-06-01 | 2013-08-28 | 青岛农业大学 | MZ interferometer based on dumb-bell-shaped optical fiber structure |
| CN103940355A (en) * | 2014-02-26 | 2014-07-23 | 深圳大学 | Intensity-modulating-type optical-fiber Michelson strain sensor and manufacturing method thereof |
| CN107677390A (en) * | 2017-09-21 | 2018-02-09 | 西安交通大学 | A kind of melting cone type optical fiber mach increases the preparation method of Dare sensor |
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| US20030123801A1 (en) * | 2001-11-27 | 2003-07-03 | Rolston David R | All-fiber dynamic optical wavelength switch/filter device |
| US20110305418A1 (en) * | 2010-06-11 | 2011-12-15 | National United University | Single-fiber mach-zehnder filter and method of manufacturing the same |
| CN203148386U (en) * | 2013-01-17 | 2013-08-21 | 中国计量学院 | Mach-Zehnder interference high-sensitivity micro-displacement sensor based on telescopic pyrometric cone structure |
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2013
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Patent Citations (3)
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|---|---|---|---|---|
| US20030123801A1 (en) * | 2001-11-27 | 2003-07-03 | Rolston David R | All-fiber dynamic optical wavelength switch/filter device |
| US20110305418A1 (en) * | 2010-06-11 | 2011-12-15 | National United University | Single-fiber mach-zehnder filter and method of manufacturing the same |
| CN203148386U (en) * | 2013-01-17 | 2013-08-21 | 中国计量学院 | Mach-Zehnder interference high-sensitivity micro-displacement sensor based on telescopic pyrometric cone structure |
Non-Patent Citations (2)
| Title |
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| CHUAN ZHONG ET AL.: "Temperature-insensitive optical fiber two-dimensional micrometric displacement sensor based on an in-line Mach–Zehnder interferometer", 《OPTICAL SOCIETY OF AMERICA》, vol. 29, no. 5, 1 May 2012 (2012-05-01) * |
| ZHAOBING TIAN ET AL.: "In-Line Abrupt Taper Optical Fiber Mach–Zehnder Interferometric Strain Sensor", 《IEEE PHOTONICS TECHNOLOGY LETTERS》, vol. 21, no. 3, 1 February 2009 (2009-02-01) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267999A (en) * | 2013-06-01 | 2013-08-28 | 青岛农业大学 | MZ interferometer based on dumb-bell-shaped optical fiber structure |
| CN103267999B (en) * | 2013-06-01 | 2018-02-06 | 青岛农业大学 | Mach-Zehnder interferometer based on dumb-bell shape optical fiber structure |
| CN103940355A (en) * | 2014-02-26 | 2014-07-23 | 深圳大学 | Intensity-modulating-type optical-fiber Michelson strain sensor and manufacturing method thereof |
| CN107677390A (en) * | 2017-09-21 | 2018-02-09 | 西安交通大学 | A kind of melting cone type optical fiber mach increases the preparation method of Dare sensor |
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| CN103115570B (en) | 2015-09-23 |
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