CN204177401U - A kind of fiber Bragg grating (FBG) demodulator - Google Patents
A kind of fiber Bragg grating (FBG) demodulator Download PDFInfo
- Publication number
- CN204177401U CN204177401U CN201420479242.9U CN201420479242U CN204177401U CN 204177401 U CN204177401 U CN 204177401U CN 201420479242 U CN201420479242 U CN 201420479242U CN 204177401 U CN204177401 U CN 204177401U
- Authority
- CN
- China
- Prior art keywords
- temperature
- working chamber
- fbg
- bragg grating
- demodulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model relates to a kind of fiber Bragg grating (FBG) demodulator, and this fiber Bragg grating (FBG) demodulator comprises: temperature control system; Working chamber, comprises the optical device of fiber Bragg grating (FBG) demodulator; Heat-insulation layer, wraps up described working chamber, the heat interchange of optical device and working chamber outside for isolating; Wherein said temperature control system is coupled with described working chamber, in order to regulate the temperature in described working chamber.The utility model is adopted to make the operating temperature range of fiber Bragg grating (FBG) demodulator obtain expansion widely.
Description
Technical field
The utility model relates to a kind of fiber Bragg grating (FBG) demodulator, especially, relates to a kind of fiber Bragg grating (FBG) demodulator that can work in certain temperature range.
Background technology
Fiber-optic grating sensor is the one of Fibre Optical Sensor, is widely used in the fields such as monitoring structural health conditions, temperature monitoring and the monitoring of railway falling rocks.Because fiber-optic grating sensor is by the center wavelength variation of reflected light to reflect the size of measurand, thus fiber-optic grating sensor all need to coordinate fiber Bragg grating (FBG) demodulator light signal is changed into can identify by computer system that electric signal could finally be behaved used.
At present, fiber Bragg grating (FBG) demodulator mainly contains diffraction light grating (as: CN201425690, " high speed fiber grating demodulating system ") and scan-filtering formula (as: CN203083585U, " fiber Bragg grating (FBG) demodulator based on scanned laser principle ") two kinds.That diffraction light grating or scan-filtering formula fiber Bragg grating (FBG) demodulator all inevitably can use optoelectronic device and pure optical device.Due to the principle features of existing process technology limit and photoelectric device, the operating temperature range of optoelectronic device and pure optical device is all narrower.For pure optical passive component optical fiber circulator, the optical fiber circulator operating temperature range can bought on the market mostly is-5 DEG C ~ 70 DEG C, and only a few product can reach-20 DEG C ~ 70 DEG C.If exceed this temperature range, its key technical index such as insertion loss and crosstalk all can sharply increase, thus cannot use.And the active device such as light source, photoswitch general work temperature range can be narrower.Therefore, be that the fiber Bragg grating (FBG) demodulator of which kind of principle all cannot use under the condition having comparatively harsh environment temperature.
Utility model content
In order to overcome the defect that existing fiber Bragg grating (FBG) demodulator can not use in wide temperature range, the utility model provides a kind of fiber Bragg grating (FBG) demodulator, makes the operating temperature range of fiber Bragg grating (FBG) demodulator extend to-40 DEG C ~ 70 DEG C.
In one of the present utility model, provide a kind of fiber Bragg grating (FBG) demodulator, comprising: temperature control system; Working chamber, comprises the optical device of fiber Bragg grating (FBG) demodulator; Heat-insulation layer, wraps up described working chamber, for isolating the heat interchange of described optical device and working chamber outside; Wherein said temperature control system is coupled with described working chamber, in order to regulate the temperature in described working chamber.
In a preferred embodiment, wherein said temperature control system comprises temperature-control circuit, temperature sensor and temperature control equipment, and wherein said temperature sensor and described temperature-control circuit are coupled; Wherein said temperature control equipment and described temperature-control circuit are coupled.
In a preferred embodiment, described temperature sensor is arranged on inside working chamber.
In a preferred embodiment, described temperature sensor comprises one group of temperature sensor.
In a preferred embodiment, described temperature control equipment comprises refrigeration heater.
In a preferred embodiment, described refrigeration heater is semiconductor cooler.
In a preferred embodiment, described semiconductor cooler is installed into the outer surface making its workplace be close to working chamber.
In a preferred embodiment, described refrigeration heater comprises well heater and refrigerator.
In a preferred embodiment, described well heater is placed in working chamber completely, and described refrigerator is embedded in described working chamber and wraps up in the heat-insulation layer of described working chamber.
In a preferred embodiment, described working chamber comprises photoswitch, light source, photoelectric conversion module and circulator.
In a preferred embodiment, described working chamber comprises scanning light source, circulator, photodetector, scanning light source control circuit and photoelectric detective circuit.
In a preferred embodiment, described working chamber comprises scanning light source, circulator, photodetector; Described fiber Bragg grating (FBG) demodulator also comprises scanning light source control circuit and photoelectric detective circuit; Wherein scanning light source control circuit and photoelectric detective circuit are positioned at the outside of described working chamber and are coupled with described scanning light source and photodetector.
In a preferred embodiment, described temperature control system regulates temperature in described working chamber at 30 DEG C ~ 45 DEG C.
Effect of the present utility model is: the operating temperature range greatly extending fiber Bragg grating (FBG) demodulator, if having selected the higher heating and cooling device of usefulness, the working temperature of instrument even can exceed-40 DEG C ~ 70 DEG C; More accurate temperature controls the performance that can improve photoelectric component, improves the demodulation accuracy of fiber Bragg grating (FBG) demodulator, extends instrument serviceable life, strengthens reliability.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the structured flowchart of the embodiment of a kind of fiber Bragg grating (FBG) demodulator of the present utility model.
Fig. 2 is the structured flowchart of the embodiment of another kind of fiber Bragg grating (FBG) demodulator of the present utility model.
Embodiment
Fig. 1 illustrates a structured flowchart for the embodiment of fiber Bragg grating (FBG) demodulator of the present utility model.This fiber Bragg grating (FBG) demodulator is preferably applicable to diffraction grating type fiber Bragg grating (FBG) demodulator.
In FIG, temperature-control circuit is labeled as 101; Photoswitch is labeled as 102; Light source is labeled as 103; Photoelectric conversion module is labeled as 104; The optical fiber being connected to photoswitch 102 is labeled as 105; The data line being connected to host computer is labeled as 106; Working chamber is labeled as 107; Temperature sensor power supply and data line are labeled as 108; Control and the power lead of refrigeration heater are labeled as 109; Heat-insulation layer is labeled as 110; Optical fiber is labeled as 111; Circulator is labeled as 112; Refrigeration heater is labeled as 113; Temperature sensor is labeled as 114; Fiber Bragg grating (FBG) demodulator cabinet is labeled as 115.
In one embodiment, this fiber Bragg grating (FBG) demodulator comprises fiber Bragg grating (FBG) demodulator cabinet 115, working chamber 107 and temperature control system.Described working chamber 107 and temperature control system are included in fiber Bragg grating (FBG) demodulator cabinet 115.Light source 103, photoswitch 102, photoelectric conversion module 104, the optical fiber 105 being connected to photoswitch, the data line 106 being connected to host computer, circulator 112, optical fiber 111 and fiber Bragg grating (FBG) demodulator cabinet 15 constitute a basic multi-channel fiber Bragg grating (FBG) demodulator.The opposite side of optical fiber 105 is connected to fiber-optic grating sensor.Optical fiber 111 connects photoswitch 102 and circulator 112.Light source 103 and photoelectric conversion module 104 are coupled with circulator 112 respectively.
Working chamber 107 comprises light source 103, photoswitch 102, photoelectric conversion module 104, the optical fiber 105 being connected to photoswitch 102, the data line 106 being connected to host computer, circulator 112, optical fiber 111, thus to make in working chamber 107 included each device and outside is mutually isolated opens.Working chamber 107 uses heat-conducting to make, and preferably, uses the good materials of heat conductivility such as metal to make.Working chamber 107 outside is closely enclosed with heat-insulation layer 110, and to make, working chamber 107 is inner to be reduced as best one can with outside exchange heat.The optical fiber 105 being connected to photoswitch 102 and the data line 106 being connected to host computer are introduced fiber Bragg grating (FBG) demodulator by the aperture by outputing on working chamber 107 sidewall and are led to host computer.The described aperture outputed is little as much as possible, and to reduce, working chamber 107 is inner to be exchanged with outside heat.
Operationally, this fiber Bragg grating (FBG) demodulator is from optical fiber 105 receiving optical signals, by light source 103, photoswitch 102, optical fiber 111, circulator 112 and photoelectric conversion module 104, received light signal is carried out diffraction, spatially separate with each wavelength received light signal, to realize the conversion of photosignal.Then, changed electric signal is sent to host computer by the data line 106 being connected to host computer, such as computing machine, to carry out further treatment and analysis.
Temperature control system included by described fiber Bragg grating (FBG) demodulator, for regulating the temperature in described working chamber 107, the light source 103 in working chamber, photoswitch 102, photoelectric conversion module 104 and circulator 112 is made to be operated in suitable temperature range, preferably, be operated in the temperature range of 30 DEG C ~ 45 DEG C.Because the temperature in working chamber can regulate, so the optical device in working chamber can stably work.Thus, this fiber Bragg grating (FBG) demodulator can be run in the working environment of wide region, such as-40 DEG C ~ 70 DEG C.
Described temperature control system comprises: temperature-control circuit 101, heating cooler 113 and temperature sensor 114.In one embodiment, heating cooler 113 preferably uses semiconductor cooler 113.Semiconductor cooler 113 is equipped with heat radiator and fan, preferably, has cold and hot surface heat radiator and radiator fan.The workplace of semiconductor cooler 113 is close to the outer surface of working chamber 107.Semiconductor cooler 113 is coupled by power supply and control line 109 and temperature-control circuit 101.Temperature sensor 114 is coupled with temperature-control circuit 101 by temperature sensor power supply and data line 108.Temperature sensor power supply and data line 108, through the aperture of the necessity outputed in described working chamber sidewall, are connected to temperature-control circuit 101.The described aperture outputed is little as much as possible, and to reduce, working chamber 107 is inner to be exchanged with outside heat.Described temperature sensor 114 preferably includes a sets of temperature sensors.Described sets of temperature sensors 114 is arranged in the relatively intensive position of each optical device of described working chamber 207, preferably, is arranged in each position in described working chamber 107.Described temperature sensor 114 obtains the temperature in described working chamber 107 in real time, sends temperature-control circuit 101 to, control the foundation of the temperature in working chamber 107 as temperature-control circuit 101 by temperature sensor power supply and data line 108.
Semiconductor cooler 113 comprises at least one pair of N-type semiconductor material and P-type semiconductor material, and they are coupled to galvanic couple pair.After semiconductor cooler 113 connects DC current, if electric current flows to P type element (this is called forward current) from N-type element, then semiconductor cooler 113 absorbs heat, reaches the effect of cooling; If electric current flows to N-type element (this is called inverse current) from P type element), then release heat, reaches the effect of intensification.
Temperature-control circuit 101 receives the temperature signal from sets of temperature sensors 114.The signal designation minimum temperature fed back when temperature sensor 114 is lower than 30 DEG C or close to 30 DEG C, and temperature-control circuit 101 signals to semiconductor cooler 113, increases the output power of semiconductor cooler 113, correspondingly raises the temperature in working chamber 107.By such mode, in the suitable temperature ranges making the temperature in working chamber 107 maintain to be not less than 30 DEG C, to make the stable work in work of each optical device in working chamber 107.In order to improve the temperature in working chamber 107, temperature-control circuit 101 applies inverse current to semiconductor cooler 113 and increases the size of the electric current applied gradually.
When temperature sensor 114 feedback signal indicated by maximum temperature higher than 45 DEG C or close to 45 DEG C, temperature-control circuit 101 signals to semiconductor cooler 113, increase the output power of semiconductor cooler 113, correspondingly reduce the temperature in working chamber 107.By such mode, the temperature in working chamber 107 is made to maintain not higher than in the suitable temperature ranges of 45 DEG C, to make the stable work in work of each optical device in working chamber 107.In order to reduce the temperature in working chamber 107, temperature-control circuit 101 applies forward current to semiconductor cooler 113 and increases the size of the electric current applied gradually.
Temperature-control circuit 101 operates in a manner mentioned above, until the temperature that sets of temperature sensors 114 is fed back is in a suitable scope, such as, 30 DEG C ~ 45 DEG C, or other can guarantee the temperature range of the stable performance of each optical device in working chamber 107.
As mentioned above, the temperature in working chamber 107 should control in the temperature range closer to room temperature, 30 DEG C ~ 45 DEG C.In one embodiment, can according to the temperature conditions in the external world of reality, a fixing threshold value T is set.Such as, if outside is colder, this threshold value T can arrange tend to 45 DEG C, such as 44 DEG C; And if outside is hotter, then this threshold value T can arrange tend to 30 DEG C, such as 31 DEG C.This threshold value also can be arranged to different temperature values according to the consideration of real work.
When set temperature threshold value T, when temperature sensor 114 feedback signal indicated by maximum temperature higher than set threshold value T, temperature-control circuit 101 signals to semiconductor cooler 113, increase the output power of semiconductor cooler 113, correspondingly reduce the temperature in working chamber 107.By such mode, the temperature in working chamber 107 is made to maintain not higher than set threshold value T, to make the stable work in work of each optical device in working chamber 107.In order to make the maximum temperature in working chamber 107 not higher than set threshold value T, temperature-control circuit 101 applies forward current to semiconductor cooler 113 and increases the size of the electric current applied gradually.
The signal designation minimum temperature fed back when temperature sensor 114 is lower than set threshold value T, and temperature-control circuit 101 signals to semiconductor cooler 113, increases the output power of semiconductor cooler 113, correspondingly raises the temperature in working chamber 107.By such mode, the temperature in working chamber 107 is maintained and is not less than set threshold value T, to make the stable work in work of each optical device in working chamber 107.In order to make the minimum temperature in working chamber 107 be not less than set threshold value T, temperature-control circuit 101 applies inverse current to semiconductor cooler 113 and increases the size of the electric current applied gradually.
When semiconductor cooler 113 comprises multipair N-type semiconductor material and P-type semiconductor material, the size of the electric current that temperature-control circuit 101 applies to semiconductor cooler 113 also along with semiconductor material logarithm increase raising, heat up or the speed of cooling to improve further.
Fig. 2 illustrates it is a structured flowchart for the embodiment of fiber Bragg grating (FBG) demodulator of the present utility model.This fiber Bragg grating (FBG) demodulator is preferably used for scan-filtering type fiber Bragg grating (FBG) demodulator.
In fig. 2, temperature-control circuit is labeled as 201; The optical fiber being connected to circulator is labeled as 205; The data line being connected to host computer is labeled as 206; Working chamber is labeled as 207; Temperature sensor power supply and data line are labeled as 208; Heat-insulation layer is labeled as 210; Optical fiber is labeled as 211; Circulator is labeled as 212; Temperature sensor is labeled as 214; Fiber Bragg grating (FBG) demodulator cabinet is labeled as 215; Scanning light source control circuit and photoelectric detective circuit are labeled as 216; Refrigerator is labeled as 217; Well heater is labeled as 218; Scanning light source is labeled as 219; Photodetector is labeled as 220; Cooling and heating device control line and power lead are labeled as 221; Signal wire and the power lead of scanning light source and photodetector are labeled as 222.
In one embodiment, this fiber Bragg grating (FBG) demodulator comprises fiber Bragg grating (FBG) demodulator cabinet 215, working chamber 207, scanning light source control circuit and photoelectric detective circuit and temperature control system.Described working chamber 207 and temperature control system are included in fiber Bragg grating (FBG) demodulator cabinet 215.Scanning light source 219, circulator 212, photodetector 220, scanning light source control circuit and photoelectric detective circuit 216 and the optical fiber between them, data line, power lead 205,206,211,222 constitute the scan-filtering type fiber Bragg grating (FBG) demodulator that has complete function.
Working chamber 207 comprises scanning light source 219, circulator 212, photodetector 220, thus to make in working chamber 207 included each device and outside is mutually isolated opens.This working chamber 207 uses heat-conducting to make, and preferably uses the good material of the heat conductivilitys such as metal to make.Described working chamber 207 outside is closely enclosed with heat-insulation layer 210, and to make, described working chamber 207 is inner to be reduced as best one can with extraneous exchange heat.
Be connected to the optical fiber 205 of circulator 212 and the signal wire of scanning light source and photodetector and power lead 222 by by described working chamber 201 sidewall the aperture outputed introduce described working chamber 207 and lead to scanning light source control circuit and photoelectric detective circuit 216.The described aperture outputed is little as much as possible, and to reduce, working chamber 207 is inner to be exchanged with outside heat.Operationally, this fiber Bragg grating (FBG) demodulator, from optical fiber 205 receiving optical signals, by laser scans light source 219 and photodetector 220, converts electric signal to received optical signal filtering, then scanning light source control circuit and photoelectric detective circuit 216 is sent to, to be further processed.Scanning light source control circuit and photoelectric detective circuit 216 control frequency and the power of the lasing fluorescence of laser scans light source 219, and handled electric signal is sent to host computer by the data line 206 being connected to host computer, such as computing machine, to carry out further treatment and analysis.
In one embodiment, scanning light source control circuit and photoelectric detective circuit 216 also can be placed in described working chamber 207, are reduced in thus on described working chamber 207 sidewall and open more hole.
Temperature control system included by described fiber Bragg grating (FBG) demodulator, for regulating the temperature in described working chamber 207, make the scanning light source 219 in working chamber, circulator 212, photodetector 220 be operated in suitable temperature range, preferably, be operated in 30 DEG C ~ 45 DEG C.Described temperature control system comprises: temperature-control circuit 201, refrigerator 217(preferably use mini-type refrigeration compressor), well heater 218 (preferably using ptc heater).Refrigerator 217 and well heater 218 are coupled with temperature-control circuit 201 respectively by the control line of cooling and heating device and power lead 221 as the actuator of temperature control system.Temperature-control circuit 201, by temperature sensor 214, obtains work cavity temperature, and controls the temperature in working chamber by certain control strategy on this basis.
Temperature sensor 214 is coupled with temperature-control circuit 201 by temperature sensor power supply and data line 208.Temperature sensor power supply and data line 208, through the aperture of the necessity outputed in described working chamber sidewall, are then connected to temperature-control circuit 201.The described aperture outputed is little as much as possible, and to reduce, working chamber 207 is inner to be exchanged with outside heat.Described temperature sensor 214 preferably includes a sets of temperature sensors.The position that each optical device that described one group of sets of temperature sensors 214 is arranged in described working chamber 207 is relatively intensive, preferably, is arranged in each position in described working chamber 207.Described temperature sensor 214 obtains the temperature in described working chamber in real time, sends temperature-control circuit 201 to by temperature sensor data line 208, controls and regulate the foundation of the temperature in working chamber 207 as temperature-control circuit 201.
Refrigerator 217 is embedded in described working chamber 207 and wraps up in the heat-insulation layer 210 of described working chamber 207.Described refrigerator 217 accepts the instruction of described temperature-control circuit 201 to freeze further, and the temperature in working chamber 207 is reduced.Refrigerator 217 is powered by temperature-control circuit 201.
Well heater 218 can be placed in working chamber 207 completely.Well heater 218 accepts the instruction of described temperature-control circuit 201 to heat further, and the temperature in working chamber 207 is raised.Well heater 218 is powered by temperature-control circuit 201.
Temperature-control circuit 201 receives the temperature signal from sets of temperature sensors 214.When the minimum temperature of temperature sensor 214 instruction is lower than 30 DEG C or close to 30 DEG C, temperature-control circuit 201 signals to well heater 218, increases the output power of well heater 218, correspondingly raises the temperature in working chamber 207.By such mode, the temperature in working chamber 207 is made to maintain the suitable temperature ranges being not less than 30 DEG C, to make the stable work in work of each optical device in working chamber 207.
When temperature sensor 214 feedback signal indicated by maximum temperature higher than 45 DEG C or close to 45 DEG C, temperature-control circuit 201 signals to refrigerator 217, increases the output power of refrigerator 217, correspondingly reduces the temperature in working chamber 207.By such mode, the temperature in working chamber 207 is maintained not higher than the suitable temperature ranges of 45 DEG C, to make the stable work in work of each optical device in working chamber 207.
Temperature-control circuit 201 continues this operation, until the temperature that sets of temperature sensors 214 is fed back is in a suitable temperature range, such as, 30 DEG C ~ 45 DEG C, or other can ensure the temperature range of the stable performance of each optical device in working chamber 207.
As mentioned above, the temperature in working chamber 207 should control in the temperature range closer to room temperature, 30 DEG C ~ 45 DEG C.In one embodiment, according to the temperature conditions in the external world of reality, a temperature threshold T can be set.Such as, if outside is colder, this threshold value T can arrange tend to 45 DEG C, such as 44 DEG C; And if outside is hotter, then this threshold value T can arrange tend to 30 DEG C, such as 31 DEG C.This temperature threshold also can be arranged to different temperature values according to the consideration of real work.
When arranging threshold value T, when temperature sensor 214 feedback signal indicated by maximum temperature higher than set threshold value T, temperature-control circuit 201 signals to refrigerator 217, increases the output power of refrigerator 217, correspondingly reduces the temperature in working chamber 207.By such mode, the temperature in working chamber 207 is made to maintain not higher than set threshold value T, to make the stable work in work of each optical device in working chamber 207.
The signal designation minimum temperature fed back when temperature sensor 214 is lower than set temperature threshold T, and temperature-control circuit 201 signals to well heater 218, increases the output power of well heater 218, correspondingly raises the temperature in working chamber 207.By such mode, the temperature in working chamber 207 is maintained and is not less than set threshold value T, to make the stable work in work of each optical device in working chamber 207.
In a further embodiment, the temperature control system shown in Fig. 1 can be applied to fiber Bragg grating (FBG) demodulator as indicated with 2.
In yet another embodiment, the temperature control system shown in Fig. 2 can be applied to fiber Bragg grating (FBG) demodulator as indicated with 1.Such replacement does not need the amendment doing other.
The above; be only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; change can be expected easily or replace, all should be encompassed within protection domain of the present utility model.
Claims (13)
1. a fiber Bragg grating (FBG) demodulator, comprising:
Temperature control system;
Working chamber, comprises the optical device of fiber Bragg grating (FBG) demodulator;
Heat-insulation layer, wraps up described working chamber, for isolating the heat interchange of described optical device and working chamber outside;
Wherein said temperature control system is coupled with described working chamber, in order to regulate the temperature in described working chamber.
2. fiber Bragg grating (FBG) demodulator according to claim 1, wherein said temperature control system comprises temperature-control circuit, temperature sensor and temperature control equipment, and wherein said temperature sensor and described temperature-control circuit are coupled; Wherein said temperature control equipment and described temperature-control circuit are coupled.
3. fiber Bragg grating (FBG) demodulator according to claim 2, wherein said temperature sensor is arranged on inside working chamber.
4. fiber Bragg grating (FBG) demodulator according to claim 3, wherein said temperature sensor comprises one group of temperature sensor.
5. fiber Bragg grating (FBG) demodulator according to claim 2, wherein said temperature control equipment comprises refrigeration heater.
6. fiber Bragg grating (FBG) demodulator according to claim 5, wherein said refrigeration heater is semiconductor cooler.
7. fiber Bragg grating (FBG) demodulator as claimed in claim 6, wherein said semiconductor cooler is installed into the outer surface making its workplace be close to working chamber.
8. fiber Bragg grating (FBG) demodulator according to claim 5, wherein said refrigeration heater comprises well heater and refrigerator.
9. fiber Bragg grating (FBG) demodulator according to claim 8, wherein said well heater is placed in working chamber completely, and described refrigerator is embedded in described working chamber and wraps up in the heat-insulation layer of described working chamber.
10., according to the fiber Bragg grating (FBG) demodulator in claim 1-9 described in any one, wherein said described working chamber (107) comprises photoswitch (102), light source (103), photoelectric conversion module (104) and circulator (112).
11. according to the fiber Bragg grating (FBG) demodulator in claim 1-9 described in any one, and wherein said working chamber (207) comprises scanning light source (219), circulator (212), photodetector (220), scanning light source control circuit and photoelectric detective circuit (216).
12. according to the fiber Bragg grating (FBG) demodulator in claim 1-9 described in any one, and wherein said working chamber (207) comprises scanning light source (219), circulator (212), photodetector (220); Described fiber Bragg grating (FBG) demodulator also comprises scanning light source control circuit and photoelectric detective circuit (216); Wherein scanning light source control circuit and photoelectric detective circuit (216) are positioned at the outside of described working chamber (207) and are coupled with described scanning light source (219) and photodetector (220).
13. according to the fiber Bragg grating (FBG) demodulator in claim 1-9 described in any one, and wherein said temperature control system regulates temperature in described working chamber at 30 DEG C ~ 45 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420479242.9U CN204177401U (en) | 2014-08-25 | 2014-08-25 | A kind of fiber Bragg grating (FBG) demodulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420479242.9U CN204177401U (en) | 2014-08-25 | 2014-08-25 | A kind of fiber Bragg grating (FBG) demodulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204177401U true CN204177401U (en) | 2015-02-25 |
Family
ID=52566207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420479242.9U Active CN204177401U (en) | 2014-08-25 | 2014-08-25 | A kind of fiber Bragg grating (FBG) demodulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204177401U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016029812A1 (en) * | 2014-08-25 | 2016-03-03 | 同方威视技术股份有限公司 | Optical fiber grating demodulator and temperature control method thereof |
| CN108259083A (en) * | 2018-04-11 | 2018-07-06 | 金帆智华（北京）科技有限公司 | A kind of method being detected to fiber grating network failure |
| CN113008281A (en) * | 2021-02-26 | 2021-06-22 | 中煤科工集团重庆研究院有限公司 | Distributed optical fiber sensing system based on fusion of Rayleigh and Brillouin scattering |
-
2014
- 2014-08-25 CN CN201420479242.9U patent/CN204177401U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016029812A1 (en) * | 2014-08-25 | 2016-03-03 | 同方威视技术股份有限公司 | Optical fiber grating demodulator and temperature control method thereof |
| CN105444789A (en) * | 2014-08-25 | 2016-03-30 | 同方威视技术股份有限公司 | Fiber grating demodulator and temperature control method thereof |
| CN108259083A (en) * | 2018-04-11 | 2018-07-06 | 金帆智华（北京）科技有限公司 | A kind of method being detected to fiber grating network failure |
| CN113008281A (en) * | 2021-02-26 | 2021-06-22 | 中煤科工集团重庆研究院有限公司 | Distributed optical fiber sensing system based on fusion of Rayleigh and Brillouin scattering |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105444789A (en) | Fiber grating demodulator and temperature control method thereof | |
| CN204177401U (en) | A kind of fiber Bragg grating (FBG) demodulator | |
| CN102412240A (en) | APD-TIA (Avalanche Photodiode-Transfer-Impedance Amplifier) coaxial photoelectric module with temperature control function and fabrication method thereof | |
| CN104270835B (en) | A kind of optical module that can work at low ambient temperatures and the method realizing its work | |
| CN102298401B (en) | Long-distance SFP+ optical module | |
| US8251582B2 (en) | Communications device with integrated case temperature measurement | |
| CN203522740U (en) | Optical module aging system supporting on-line detection | |
| CN106774503A (en) | A kind of optical module shell temperature monitoring method and device | |
| CN103616791A (en) | Camera lens heat-insulating cooling and temperature control device | |
| CN101893506B (en) | Device for temperature test | |
| CN101285722A (en) | Optical fiber sensor temperature performance test device | |
| CN103236644B (en) | Regulate method and the device of small package hot-pluggable optical module working temperature | |
| CN107017948A (en) | A kind of SFP+ single fibers bi-directional dense wavelength division transceiver optical-electric module | |
| CN208423445U (en) | Power stability type solid state laser | |
| CN101694922A (en) | System for controlling stability of high-stability semiconductor laser light source | |
| CN105843285A (en) | Laser driver circuit having constant wavelength and power | |
| CN206992473U (en) | The temperature control equipment of ROF radio frequency fiber optic transmitting modules is integrated for multichannel | |
| CN205981243U (en) | Fiber grating wavelength demodulation system with self -adaptation function | |
| CN204615150U (en) | Based on the low drifting laser attemperating unit of double T EC | |
| CN210321776U (en) | Fiber grating light source system | |
| CN204853400U (en) | Self -adaptation calorifics system of stage lamp | |
| CN203734132U (en) | Laser light source | |
| CN105007122A (en) | Optical transceiving device based on Peltier refrigerating and heating effect | |
| CN204835196U (en) | 1064nm pulsed optical fibre laser ware circuit | |
| CN219227884U (en) | Light intensity adjusting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |