CN203527304U - Long-period fiber grating fixing device with quantifiable axial stress - Google Patents
Long-period fiber grating fixing device with quantifiable axial stress Download PDFInfo
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- CN203527304U CN203527304U CN201320583883.4U CN201320583883U CN203527304U CN 203527304 U CN203527304 U CN 203527304U CN 201320583883 U CN201320583883 U CN 201320583883U CN 203527304 U CN203527304 U CN 203527304U
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Abstract
The utility model discloses a long-period fiber grating fixing device with quantifiable axial stress. A first fixing plate is fixedly installed on the left side of a fixing plate in a penetrating mode, a second fixing plate is installed on the right side of the fixing plate without fixation, the part making contact with the fixing plate is a thin sliding pillar which can slide on a sliding rail of the fixing plate, and a first optical fiber fixing pile and a second optical fiber fixing pile are arranged on the first fixing plate and the second fixing plate and provided with a first V-type groove and a second V-type groove respectively. Fiber gratings are fixed to the optical fiber fixing piles, a knob on the leftmost side is adjusted to enable the thin sliding pillar to slide on the sliding rail through a micro-motion threaded rod, the axial stress can be quantified through scales, and a stop dog is used for guaranteeing that the relative position of fixing the fiber grating is not changed. The long-period fiber grating fixing device with the quantifiable axial stress fixes the long-period fiber grating in a concise mode and is used for conveniently performing a large number of flow-up experiments, and the axial stress can be effectively controlled and changed in a quantified mode in the process of the experiments. The long-period fiber grating fixing device with the quantifiable axial stress can be used for clamping kinds of optical fibers and is easy to manufacture and convenient to operate.
Description
Technical field
The utility model relates to the fixture of a kind of optical fiber and fiber grating, especially can quantitatively change the fixture of LPFG axial stress size.
Background technology
LPFG, as a kind of novel optical passive component, up to the present develops the only short more than ten years, but has shown wide application prospect, and its application has related to the various aspects of fiber optic communication and sensory field of optic fibre.Good reliability, antijamming capability that sensor based on LPFG not only has traditional Fibre Optical Sensor are strong, simple in structure, size is little, be suitable for the anti-electromagnetic interference in various application scenarios, anticorrosive, can under severe chemical environment, work, the advantage such as reusability is strong, and also overcome the weak and sensing light beam of transducing signal and be kept in detention all the time and in fiber core internal transmission, cause the shortcomings such as demodulation techniques complexity of Bragg type sensor.And because the cycle of LPFG is long, satisfied phase-matching condition is that the fibre core basic mode of symport and the lotus root between cladding mode are closed, this feature makes resonance wavelength and resonance intensity, and the variation of environment is very responsive to external world, have than the better temperature of tradition, stress, bending, distortion, transverse load, refractive index sensitivity, can be used for microorganism, environmental monitoring and corrosion monitoring, more can realize on-line measurement.At present, LPFG has been used to corrosion monitoring and the ambient humidity monitoring of aircraft pad, the corrosion monitoring of armored concrete, and the oil pollution monitoring in water environment and chromium ion monitoring etc.Therefore, the sensor based on LPFG has better application development potentiality.
Utilize high frequency CO
2there is natural torsion in the LPFG that the methods such as laser instrument are write system, cause the sensitivity of long-period grating pair bending, require LPFG under stretching state, just can have transmission spectrum, only under certain stress, LPFG could normal work.Therefore need to carry out special design to the fixture of LPFG.
At present, the optical fiber that laboratory utilizes and the clamping device of grating are mainly fibre clip, and with the base of tiny V-type groove with the clamper of rubber blanket, what rely on magnetic between magnet and screw fixedly realizes grip optical fiber and grating.But be exactly the more more accurate instruments of the similar fibre clip function of principle except fibre clip, but the rising that simultaneously expense also can be sharply.Laboratory is for realizing the fixing of LPFG, be generally and first fix two fibre clip, then under pre-stressed state in two fibre clip fixed length period optical fiber grating, or the other end is determined by suspended weight with optical fiber is clamping in LPFG one end, realize the fixing of LPFG, then test, the method of two fibre clip cannot change for stress, the method of a fibre clip and a pulley is subject to the interference ratio of external environment larger, the equipment of two kinds of method uses is many, the materials such as rubber are very large to experiment content restriction, the very large difficulty of bringing for the experiment of research LPFG characteristic and purposes.
Long-period grating pair is also responsive in the change of axial stress, and the change of axial stress can cause that LPFG transmission spectrum changes accordingly.Axial stress is exactly disturbing factor for other characteristics of LPFG, has identical axial stress while wishing each experiment fixed length period optical fiber grating from the angle of control variables.In order to open up the application prospect that LPFG is more wide, need to the fixture of LPFG be improved and be optimized.
Summary of the invention
The purpose of this utility model is better fixed fiber grating, a kind of fiber grating clamping device that can quantize to change fiber grating axial stress size is provided, solves that the pilot system of building in present laboratory is unstable, experiment equipment is many, materials limitations is large, experiment carries out the problems such as difficulty.
The purpose of this utility model is to realize by following technical scheme: the quantifiable LPFG fixture of axial stress, its fixed head (10) left side penetrates and is fixedly mounting the first fixed head (3), fixed head (10) right side is the second fixed head (6), the second fixed head (6) is not fixed on fixed head (10), with fixed head (10) contact site be fine and smooth post (15), can slide the slideway (11) of fixed head (10) is upper.On the first fixed head (3) and the second fixed head (6), be respectively the first optical fiber spud pile (9) and the second optical fiber spud pile (13) with the first V-type groove (8) and the second V-type groove (14), fiber grating two ends are fixed respectively on the first optical fiber spud pile (9) and the second optical fiber spud pile (13), regulate the knob (1) of the leftmost side to make fine and smooth post (15) in the upper slip of slideway (11) by fine motion screw rod, by scale (2), can quantize the size of axial stress.When determining the size of axial stress and test, tighten retainer (4), guarantee that the fixing relative position of fiber grating is constant.So just, realized the fixing of the quantifiable LPFG of axial stress.
By the quantifiable LPFG fixture of above-described stress, it is characterized in that knob (1), scale (2) and the first fixed head (3), retainer (4) and the high-precision slight distance that quantized of fine motion screw rod (5), the size that axial stress is changed represents by distance.V-type groove on the first optical fiber spud pile (9) and the second optical fiber spud pile (13) for various adhesives by fiber grating use fixed thereon, the first screw hole (7) above and the second screw hole (12) can increase it for fixed fiber folder and use scope.The first fixed head (3) is fixed, by fine motion screw rod, be connected with the second fixed head (6), and slideway (11) and fine and smooth post (15) cross section are rectangle, this guaranteed the first V-type groove (8), the second V-type groove (14) and between the two these 3 line segments of line on same straight line.
The beneficial effects of the utility model are: very succinct realizes the fixing of LPFG and carry out a large amount of follow-up tests easily, can effectively control the size of axial stress in experimentation, and the size of the change axial stress of equivalent; Can be used for the clamping of various optical fiber, make simple, easy to operate.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1 is structure chart of the present utility model: 1. knobs in figure, 2. scale, 3. the first fixed head, 4. retainer, 5. fine motion screw rod, 6. the second fixed head, 7. the first screw hole, 8. the first V-type groove, 9. the first optical fiber spud pile, 10. fixed head, 11. slideways, 12. second screw holes, 13. second optical fiber spud piles, 14. second V-type grooves, 15. fine and smooth posts.
The specific embodiment
In Fig. 1, LPFG is placed on the first optical fiber spud pile (9) and the second optical fiber spud pile (13) the first V-type groove (8) and the second V-type groove (14) above, so grating part, between two V-type grooves, if need to know prestressed size, is carried out pasting of optical fiber under fixing prestressing force; If do not need to know prestressed size, directly paste.Also fixed fiber presss from both sides in the above, the mode that experimental different choice is different.After clamping or fixing, one end connects light source, one end connects the instrument that can analyze LPFG transmission spectrum performance, according to concrete experiment or application purpose, the transmission spectrum adjusting knob (1) of observing LPFG regulates the size of axial stress.
Claims (2)
1. the quantifiable LPFG fixture of axial stress, its fixed head (10) left side penetrates and is fixedly mounting the first fixed head (3), fixed head (10) right side is installed with the second fixed head (6), the second fixed head (6) is not fixed on fixed head (10), with fixed head (10) contact site be fine and smooth post (15), can above slide at the slideway (11) of fixed head (10), on the first fixed head (3) and the second fixed head (6), be divided into the first optical fiber spud pile (9) and the second optical fiber spud pile (13) with the first V-type groove (8) and the second V-type groove (14), fiber grating is fixed on optical fiber spud pile, regulate the knob (1) of the leftmost side to make fine and smooth post (15) in the upper slip of slideway (11) by fine motion screw rod, by scale (2), can quantize the size of axial stress, retainer (4) guarantees that the fixing relative position of fiber grating is constant.
2. the quantifiable LPFG fixture of axial stress according to claim 1, it is characterized in that knob (1), scale (2) and fixed head (3), retainer (4) and the high-precision slight distance that quantized of fine motion screw rod (5), the size that axial stress is changed represents by distance, V-type groove on the first optical fiber spud pile (9) and the second optical fiber spud pile (13) for various adhesives by fiber grating use fixed thereon, the first screw hole (7) above and the second screw hole (12) can increase its scope of application for fixed fiber folder, the first fixed head (3) is fixed, by fine motion screw rod, be connected with the second fixed head (6), and slideway (11) and fine and smooth post (15) cross section are rectangle, this guaranteed the first V-type groove (8), the second V-type groove (14) and between the two these 3 line segments of line on same straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320583883.4U CN203527304U (en) | 2013-09-22 | 2013-09-22 | Long-period fiber grating fixing device with quantifiable axial stress |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320583883.4U CN203527304U (en) | 2013-09-22 | 2013-09-22 | Long-period fiber grating fixing device with quantifiable axial stress |
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| CN203527304U true CN203527304U (en) | 2014-04-09 |
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| CN201320583883.4U Expired - Fee Related CN203527304U (en) | 2013-09-22 | 2013-09-22 | Long-period fiber grating fixing device with quantifiable axial stress |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433871A (en) * | 2013-09-22 | 2013-12-11 | 刘明生 | Long-cycle fiber bragg grating fixing device with quantizable axial stress |
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2013
- 2013-09-22 CN CN201320583883.4U patent/CN203527304U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433871A (en) * | 2013-09-22 | 2013-12-11 | 刘明生 | Long-cycle fiber bragg grating fixing device with quantizable axial stress |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20140922 |
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| EXPY | Termination of patent right or utility model |