CN206573235U - A kind of sagnac interferometer temperature sensor based on optical fiber ring laser - Google Patents
A kind of sagnac interferometer temperature sensor based on optical fiber ring laser Download PDFInfo
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- CN206573235U CN206573235U CN201720266611.XU CN201720266611U CN206573235U CN 206573235 U CN206573235 U CN 206573235U CN 201720266611 U CN201720266611 U CN 201720266611U CN 206573235 U CN206573235 U CN 206573235U
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- fiber
- sagnac interferometer
- optical fiber
- ring laser
- photonic crystal
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Abstract
The utility model discloses a kind of sagnac interferometer temperature sensor based on optical fiber ring laser, it is characterised in that：The sagnac interferometer for the photonic crystal fiber for pouring into liquid alcohol containing one section of part is fused in wavelength division multiplexer, optoisolator, sagnac interferometer, light polarizer, the optical fiber ring laser resonator of 1*2 types fiber coupler composition.On the one hand the photonic crystal fiber that part pours into liquid alcohol plays a part of TEMP, on the other hand as optical filter.Using when, the photonic crystal fiber that one section of part is poured into alcohol is placed in the environment of different temperatures, utilize fiber spectrometer measure optical fiber ring laser output laser center wavelength, you can determine temperature.Using the modeling characteristic of laserresonator, with detectable signal is strong, signal to noise ratio is high, line width, high sensitivity the characteristics of, can be applied in all kinds of Practical Projects.
Description
Technical field
The utility model belongs to technical field of optical fiber sensing, and in particular to a kind of Sagner based on optical fiber ring laser
Gram interferometer temperature sensor.
Background technology
The mode of temperature survey is varied, and the application of traditional temperature measurement technology in each field is very ripe, such as
Thermistor, semiconductor and other types of temperature sensor.But in some particular surroundings, such as in high temperature, high pressure, easily
When combustion, explosive, strong-electromagnetic field interference, the above-mentioned conventional temperature sensor based on electric signal measurement is by very big limit
System.Now fiber temperature sensing system is with its unique advantage, and superior performance is gradually favored by people.
Interference optical-fiber temperature sensors are a kind of phase modulation-type fibre optical sensors.It is dry using Mach-Zehnder
The interference fringes of some interferometers such as interferometer, Fabry-Perot interferometers, Sagnac interferometers realizes TEMP.Work as temperature
When degree changes, interference fringe will shift, by determining centre wavelength come measurement temperature.But, due to usually used
Light source is all specific resonance peak in wideband light source, therefore detectable signal, i.e. output spectrum, and corresponding light intensity is weaker.The opposing party
Face, the interference spectrum contrast of interferometer output is relatively low, and the three dB bandwidth of resonance peak is larger, it is difficult to accurately determine resonance peak
Centre wavelength, causes thermometric error larger.
The content of the invention
In order to solve above-mentioned the deficiencies in the prior art, the utility model provides a kind of Sa Ge based on optical fiber ring laser
Nanogram interferometer temperature sensor, sagnac interferometer is linked into ring laser.On the one hand the fibre optic interferometer rises
To the effect of TEMP, on the one hand as optical filter, so that the centre wavelength of laser output laser is by temperature
Modulation.The centre wavelength of laser is exported by measuring laser can obtain the temperature of test environment.Laser exports laser
With light intensity is big, super-narrow line width characteristic, guarantee is provided for the accurate determination of its centre wavelength.
The technical scheme that the utility model is used：A kind of sagnac interferometer temperature based on optical fiber ring laser
Sensor, including pump laser, wavelength division multiplexer, Er-doped fiber, optoisolator, sagnac interferometer, light polarizer, 1*
2 type fiber couplers, fiber spectrometer.
Wherein, the output wavelength of pump laser can be 980nm, and correspondence wavelength division multiplexer can use 980/1550nm type light
Fine wavelength division multiplexer；The photonic crystal fiber that part pours into liquid alcohol is 5~10mm；Connect optical fiber can using G.652,
G.653 and G.655 single-mode fiber.
The beneficial effects of the utility model are：
1. on the one hand the sagnac interferometer plays a part of TEMP, on the one hand as optical filter, so that
So that the centre wavelength of laser output laser is modulated by temperature.
2. sagnac interferometer is connected in the resonator light path of optical fiber ring laser, constitutes one and be based on optical fiber
The TEMP measuring system of ring laser.Because the laser that optical fiber laser is exported has light intensity big and super-narrow line width spy
Property, be conducive to the Accurate Determining of its centre wavelength, the temperature for being accurate measurement test environment provides guarantee, may finally be real
The high-precision sensing measurement of existing temperature.
Brief description of the drawings
Below in conjunction with the accompanying drawings and concrete mode the utility model is described in further detail.
Fig. 1 pours into the structure chart of the photonic crystal fiber of liquid alcohol for part.Wherein, Fig. 1 (a) gives its rip cutting side
To sectional view；Fig. 1 (b) gives the sectional view of its transverse direction.
Fig. 2 is that the sagnac interferometer temperature sensing structure for the photonic crystal fiber for pouring into liquid alcohol based on part shows
It is intended to；
Fig. 3 is the application implementation schematic diagram of the sagnac interferometer temperature sensor based on optical fiber ring laser.
In figure：1.2*2 single-mode optical-fibre couplers, 2. parts pour into the photonic crystal fiber of liquid alcohol, 3. pumping lasers
Device, 4. wavelength division multiplexers, 5. Er-doped fibers, 6. optoisolators, 7. light polarizers, 8.1*2 type fiber couplers, 9. fiber spectrums
Instrument.
Embodiment
The photon that each connection end in left and right of 2*2 single-mode optical-fibre couplers (1) pours into liquid alcohol with part respectively is brilliant
The two ends welding of body optical fiber (2), constitutes a sagnac interferometer, such as Fig. 2；Two ports difference of wavelength division multiplexer (4)
It is connected with pump laser (3) and Er-doped fiber (5)；The other end of Er-doped fiber (5) is connected with optical circulator (6),
The other end of optical circulator (6) is connected with 2*2 single-mode optical-fibre couplers (1), the other end of 2*2 single-mode optical-fibre couplers (1)
It is connected with light polarizer (7), the other end of light polarizer (7) is connected with 1*2 types fiber coupler (8), 1*2 type fiber couplers
(8) the other end is connected with fiber spectrometer (9) and wavelength division multiplexer (4) respectively, such as Fig. 3；Then there will be sensing effect
Sagnac interferometer be placed in different environment temperatures and carry out sensing measurement, temperature change pours into the refraction of liquid by causing
Rate changes, and the centre wavelength for ultimately causing laser output laser is drifted about.The laser of optical fiber laser output simultaneously has
Big and super-narrow line width the characteristic of light intensity, is conducive to the Accurate Determining of its centre wavelength, realizes the high-acruracy survey of temperature.
Claims (2)
1. a kind of sagnac interferometer temperature sensor based on optical fiber ring laser, including pump laser, wavelength-division are multiple
With device, Er-doped fiber, optoisolator, sagnac interferometer, light polarizer, 1*2 types fiber coupler, fiber spectrometer, its
It is characterised by：Described sagnac interferometer includes 2*2 single-mode optical-fibre couplers and part pours into the photon crystalline substance of liquid alcohol
Body optical fiber, the two ends welding of each connection ends in left and right of wherein 2*2 single-mode optical-fibre couplers respectively with photonic crystal fiber, structure
Into a sagnac interferometer；Two ports of wavelength division multiplexer are connected with pump laser and Er-doped fiber respectively,
The other end of Er-doped fiber is connected with optoisolator, and the other end of optoisolator is connected with sagnac interferometer, Sa Ge
The other end of nanogram interferometer is connected with light polarizer, and the other end of light polarizer is connected with 1*2 type fiber couplers, 1*2 types
The other end of fiber coupler is connected with fiber spectrometer and wavelength division multiplexer respectively.
2. a kind of sagnac interferometer temperature sensor based on optical fiber ring laser according to claim 1, its
It is characterised by：The photonic crystal fiber that part pours into liquid alcohol is 5~10mm；Connect optical fiber can using G.652, G.653 and
G.655 single-mode fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720266611.XU CN206573235U (en) | 2017-03-16 | 2017-03-16 | A kind of sagnac interferometer temperature sensor based on optical fiber ring laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720266611.XU CN206573235U (en) | 2017-03-16 | 2017-03-16 | A kind of sagnac interferometer temperature sensor based on optical fiber ring laser |
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| CN201720266611.XU Expired - Fee Related CN206573235U (en) | 2017-03-16 | 2017-03-16 | A kind of sagnac interferometer temperature sensor based on optical fiber ring laser |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607220A (en) * | 2017-09-25 | 2018-01-19 | 兰州理工大学 | A kind of fast optical pulse broadening temperature sensing method of photonic crystal fiber and sensor based on liquid filling |
| CN107806944A (en) * | 2017-11-03 | 2018-03-16 | 黑龙江工程学院 | A kind of temperature sensor based on Sagnac interference and annular Research on Cavity Ring Down Spectroscopy |
| CN109580038A (en) * | 2019-01-23 | 2019-04-05 | 国网江西省电力有限公司信息通信分公司 | Temperature sensing demodulating equipment and demodulation method based on microwave photon filter |
| CN112816096A (en) * | 2021-03-08 | 2021-05-18 | 杭州电子科技大学 | Cascade interferometer optical fiber temperature sensor based on vernier effect |
| CN112857610A (en) * | 2021-01-13 | 2021-05-28 | 贵州大学 | High-sensitivity temperature sensing system based on laser oscillation loop |
-
2017
- 2017-03-16 CN CN201720266611.XU patent/CN206573235U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607220A (en) * | 2017-09-25 | 2018-01-19 | 兰州理工大学 | A kind of fast optical pulse broadening temperature sensing method of photonic crystal fiber and sensor based on liquid filling |
| CN107607220B (en) * | 2017-09-25 | 2021-01-12 | 兰州理工大学 | Photonic crystal fiber fast light pulse broadening temperature sensing method and sensor based on liquid filling |
| CN107806944A (en) * | 2017-11-03 | 2018-03-16 | 黑龙江工程学院 | A kind of temperature sensor based on Sagnac interference and annular Research on Cavity Ring Down Spectroscopy |
| CN109580038A (en) * | 2019-01-23 | 2019-04-05 | 国网江西省电力有限公司信息通信分公司 | Temperature sensing demodulating equipment and demodulation method based on microwave photon filter |
| CN109580038B (en) * | 2019-01-23 | 2021-05-11 | 国网江西省电力有限公司信息通信分公司 | Temperature sensing demodulation device and demodulation method based on microwave photon filter |
| CN112857610A (en) * | 2021-01-13 | 2021-05-28 | 贵州大学 | High-sensitivity temperature sensing system based on laser oscillation loop |
| CN112816096A (en) * | 2021-03-08 | 2021-05-18 | 杭州电子科技大学 | Cascade interferometer optical fiber temperature sensor based on vernier effect |
| CN112816096B (en) * | 2021-03-08 | 2024-06-07 | 杭州电子科技大学 | Cascade interferometer optical fiber temperature sensor based on vernier effect |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171020 Termination date: 20180316 |
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| CF01 | Termination of patent right due to non-payment of annual fee |