CN102706375A - Optical fiber-wireless mixed type sensing monitoring system - Google Patents
Optical fiber-wireless mixed type sensing monitoring system Download PDFInfo
- Publication number
- CN102706375A CN102706375A CN2012102141895A CN201210214189A CN102706375A CN 102706375 A CN102706375 A CN 102706375A CN 2012102141895 A CN2012102141895 A CN 2012102141895A CN 201210214189 A CN201210214189 A CN 201210214189A CN 102706375 A CN102706375 A CN 102706375A
- Authority
- CN
- China
- Prior art keywords
- wireless
- optical fiber
- fiber
- laser sensor
- sensing
- 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.)
- Pending
Links
Images
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Optical Transform (AREA)
Abstract
The invention relates to an optical fiber-wireless mixed type sensing monitoring system relating to the technical field of optical fiber sensing networks and wireless sensing networks and aiming at solving the problems of large size, high cost, high power consumption, difficult realization of small-size and high-integration wireless optical fiber sensing of an optical interference demodulation or wavelength detection device of the traditional wireless optical fiber sensing system. The optical fiber-wireless mixed type sensing monitoring system comprises a pump light source, an isolator, a wavelength division multiplexer, a multi-longitudinal mode optical fiber laser sensor, a photoelectric detector, a No.1 amplifier, a No.2 amplifier, a wireless transmitting device, a wireless receiving device and a frequency meter, wherein the pump light source is connected to the input end of the isolator; the isolator is connected with the wavelength division multiplexer; and the wavelength division multiplexer is connected with the multi-longitudinal mode optical fiber laser sensor. In the invention, an optical demodulation part in the technology does not needs the huge optical interference demodulation or wavelength detection device, and the demodulation of an optical fiber sensor can be realized by utilizing the photoelectric detector and the frequency meter, and therefore, an all-electronic demodulation-wireless transmission process is realized; and in addition, the invention is suitable for the technical field of the optical fiber sensing networks and the wireless sensing networks.
Description
Technical field
The present invention relates to Fibre Optical Sensor and radio sensing network technical field.
Background technology
Advantages such as Fibre Optical Sensor is little, in light weight, corrosion-resistant because of its anti-electromagnetic interference (EMI), volume, essence is explosion-proof; Make it become the desirable sensing element in strong electromagnetic, rugged surroundings, small size, Application in Sensing field such as extensive, be widely used in the health monitoring of key areas such as highway, railway, bridge, dam, boats and ships, petroleum drilling, large aircraft.But Fibre Optical Sensor is on-the-spot to be laid, troublesome maintenance, and distance sensing receives the fibre loss restriction, and maximum has only 100km, can't realize the real-time monitoring of overlength distance.And wireless sensing has huge advantages such as wireless network, can get involved radio sensing network flexibly, realizes that overlength distance monitors in real time, has remedied shortcomings such as wiring trouble, the distance sensing of optical fiber sensing network be limited just.If we can be dissolved into radio sensing network with Fibre Optical Sensor; So just can bring into play optical fiber and wireless both advantage simultaneously; Utilize existing wireless sensing and communication network to realize real-time monitoring, thereby be implemented in over distance sensor monitoring under the rugged surroundings such as strong electromagnetic, extreme climate Fibre Optical Sensor information.Both enrich the monitoring range of radio sensing network, expanded the monitoring distance and the application of Fibre Optical Sensor again.
The radio optic fiber sensing technology has obtained a large amount of research in recent years, and for example number of research projects has all been done by University Of Tianjin and Zhejiang University etc.But its main idea is to be converted into phase information to the wavelength heat transfer agent of fiber grating through non-equilibrium interferometer; Process A/D conversion and DSP handle the information of the monitored physical quantity of reduction again; Become emission of radio frequency signals to go out through the wireless-modulated device modulates these information then, be dissolved into existing radio sensing network.But such radio optic fiber sensing system needs precision optics to interfere demodulation or wavelength detection device, and its volume is big, cost is high, power attenuation is big, can't realize small size, the radio optic fiber sensing that height is integrated, power consumption is little.
Summary of the invention
The objective of the invention is that volume for the optical interference demodulation that solves existing radio optic fiber sensing system or wavelength detection device is big, cost is high, power attenuation is big; Be difficult to realize the problem of the high integrated radio optic fiber sensing of small size, a kind of optical fiber-wireless hybrid sensing and monitoring system is provided.
Optical fiber-wireless hybrid sensing and monitoring system; It is made up of pump light source, isolator, wavelength division multiplexer, many longitudinal modes fiber laser sensor, photodetector, an amplifier, No. two amplifiers, wireless launcher, radio receiver and frequency meters; The output terminal of pump light source is connected the input end of isolator through Transmission Fibers; The output terminal of isolator is connected the input end of wavelength division multiplexer through Transmission Fibers; The handshake terminal of wavelength division multiplexer is connected the handshake terminal of many longitudinal modes fiber laser sensor; The output terminal of wavelength division multiplexer is connected the input end of photodetector through Transmission Fibers; The output terminal of photodetector is connected amplifier input terminal No. one, and the output terminal of an amplifier is connected the input end of wireless launcher, adopts wireless telecommunications to realize data transmission between wireless launcher and the radio receiver; The output terminal of radio receiver is connected amplifier input terminal No. two, and the output terminal of No. two amplifiers is connected the input end of frequency meter.
The present invention does not need optical interference demodulation or wavelength detection device; But utilize the sensing element of optical fiber multilongitudianl-mode laser sensor as physical parameters such as stress, temperature, pressure; The Multi-Longitudinal Mode laser that said sensing element produces produces radio frequency beat frequency transducing signal through beat frequency between pattern; On detector, directly generate electronics radio frequency beat signal, amplifier directly incorporates existing wireless network through wireless launcher after amplifying.All accomplish from the wireless transmit that detects of signal, realized sensing scheme highly integrated, stable performance at a circuit board.Solved the problem that volume is big, cost is high, power attenuation is big of existing radio optic fiber sensing system.Receiving trap receives said beat frequency transducing signal just can monitor the beat signal frequency situation of change through frequency meter, is reduced into monitored physical message then.The information of Fibre Optical Sensor can incorporate radio sensing network very easily by this method, can both obtain Fibre Optical Sensor information with any environment at any time and any place; Be applicable to anti-electromagnetic interference (EMI), explosion-proof, high temperature, high pressure, the monitoring of occasion such as strong corrosion property for physical messages such as stress, pressure, temperature arranged, be specially adapted to such as under water, circumstance complication sensing wireless senser such as high temperature oil tank can't realize surveying but have and need the overlength distance zone of monitoring in real time.Can realize that with present technique counter stress, pressure, temperature etc. cause real-time, the unattended extra long distance on-line monitoring of the physical message of laser instrument beat frequency signal change.
Description of drawings
Fig. 1 is a composition structural representation of the present invention; Fig. 2 is the structural representation of many longitudinal modes of ring cavity fiber laser sensor of embodiment three; Fig. 3 is the structural representation of straight many longitudinal modes of cavate fiber laser sensor of embodiment four; Fig. 4 is the change curve of the beat frequency transducing signal frequency of 979.7MHz and 1795.5MHz in the embodiment four with extraneous institute stress application; The curve that " zero " forms among the figure is the beat frequency transducing signal of free state lower frequency 979.7MHz before the wireless transmission and the response relation curve of stress; The curve that " " forms is the beat frequency transducing signal of free state lower frequency 979.7MHz after the wireless transmission and the response relation curve of stress; The curve that " ◇ " forms is the beat frequency transducing signal of free state lower frequency 1795.5MHz before the wireless transmission and the response relation curve of stress, and the curve that " △ " forms is the beat frequency transducing signal of free state lower frequency 1795.5MHz after the wireless transmission and the response relation curve of stress.
Embodiment
Embodiment one: combine Fig. 1 that this embodiment is described; The said optical fiber of this embodiment-wireless hybrid sensing and monitoring system, it is made up of pump light source 1, isolator 3, wavelength division multiplexer 4, many longitudinal modes fiber laser sensor 5, photodetector 6, amplifier 7, No. two amplifiers 10, wireless launcher 8, radio receiver 9 and frequency meters 11.The output terminal of pump light source 1 is connected the input end of isolator 3 through Transmission Fibers; The output terminal of isolator 3 is connected the input end of wavelength division multiplexer 4 through Transmission Fibers; The handshake terminal of wavelength division multiplexer 4 is connected the handshake terminal of many longitudinal modes fiber laser sensor 5; The output terminal of wavelength division multiplexer 4 is connected the input end of photodetector 6 through Transmission Fibers; The output terminal of photodetector 6 is connected the input end of an amplifier 7, and the output terminal of an amplifier 7 is connected the input end of wireless launcher 8, adopts wireless telecommunications to realize data transmission between wireless launcher 8 and the radio receiver 9; The output terminal of radio receiver 9 is connected the input end of No. two amplifiers 10, and the output terminal of No. two amplifiers 10 is connected the input end of frequency meter 11.
Pump light source 1 gets into many longitudinal modes fiber laser sensor 5 via isolator 3, wavelength division multiplexer 4, for many longitudinal modes fiber laser sensor provides pump light source.Under the effect of pumping laser, produce multilongitudianl-mode laser in many longitudinal modes fiber laser sensor 5 resonator cavitys.The optical signals resonator cavity of multilongitudianl-mode laser comes out to be back to wavelength division multiplexer 4 through optical fiber; And the output terminal that passes through wavelength division multiplexer 4 arrives photodetector 6 along optical fiber; Interfere each other between the multilongitudianl-mode laser and produce the radio frequency beat signal; 6 detections obtain the beat frequency transducing signal of radio frequency domains and amplify the back by an amplifier 7 and launch through wireless launcher 8 through photodetector, incorporate wireless network.Radio receiver 9 is used for receiving the beat frequency transducing signal of wireless transmission, and No. two amplifier 10 amplifies this beat frequency transducing signal and sends frequency meter 11 to, is used for monitoring the change of frequency situation of this beat frequency transducing signal.By means of the corresponding relation of beat signal frequency and monitored physical quantity, obtain beat frequency transducing signal change of frequency value through frequency meter 11 observations, demodulate monitored physical message.
Isolator 3 is to disturb in order to prevent that many longitudinal modes fiber laser sensor 5 back-scattering lights from producing pump light source 1.Many longitudinal modes fiber laser sensor 5 is realized the sensor monitoring such as physical messages such as stress, pressure, temperature through experiencing the frequency values that physical messages such as extraneous stress, pressure, temperature change the beat frequency transducing signal that self produces.Photodetector 6 is used for converting the light signal of many longitudinal modes fiber laser sensor 5 into electric signal.The signal intensity that amplifier 7 and No. two amplifiers 10 are used for amplifying the beat frequency transducing signal remedies the loss of intensity of beat frequency transducing signal in transmission course, so that survey more accurately.Wireless launcher 8 and radio receiver 9 are used separately as the wireless transmit and the reception of beat frequency transducing signal.
Utilize the sensing element of optical fiber multilongitudianl-mode laser sensor as physical parameters such as stress, temperature, pressure; The beat frequency transducing signal that it produces directly generates the radio frequency sensing signal through detector; Directly incorporate existing wireless network through after amplifying, realized that light signal is transferred to wireless transmit and receives all electronic and accomplish from separating through wireless launcher.Avoided the shortcoming such as complicated optics and cost height of the non-equilibrium interferometer of optical fiber.Receiving trap receives said beat frequency transducing signal through this beat frequency transducing signal of frequency meter demodulation, and reduces monitored physical message.Can both obtain Fibre Optical Sensor information with any environment at any time and any place.
Embodiment two: this embodiment is the further qualification to embodiment one said optical fiber-wireless hybrid sensing and monitoring system, and pump light source 1 adopts 980nm or 1480nm pump light source.
Embodiment three: combine Fig. 2 that this embodiment is described; This embodiment is the further qualification to embodiment one said optical fiber-wireless hybrid sensing and monitoring system; Many longitudinal modes fiber laser sensor 5 adopts many longitudinal modes of ring cavity fiber laser sensor; Said many longitudinal modes of ring cavity fiber laser sensor is made up of fiber grating 12, coupling mechanism 13 and Er-doped fiber 14, and coupling mechanism 13 is serially connected in the light path between fiber grating 12 and the Er-doped fiber 14.
Pump light enters into ring cavity through fiber grating 12, coupling mechanism 13; Along propagating clockwise with counterclockwise; Amplify through Er-doped fiber 14; And pass through coupling mechanism 13 and get back to fiber grating 12 places, fiber grating 12 is realized the selection of special wavelength light in the reflection bandwidths, the light light signal of specific wavelength returns in the ring cavity again then.After repeatedly amplifying vibration, the multilongitudianl-mode laser in fiber grating 12 reflection bandwidths in this ring cavity stable swash penetrate, then from fiber grating 12 outputs obtain having stress, the beat frequency transducing signal of physical messages such as pressure, temperature.
Er-doped fiber 14 is used for physical messages to be measured such as extraneous stress, pressure, temperature are converted into the changing value of the beat frequency transducing signal frequency of many longitudinal modes fiber laser sensor generation.The relation of the variation of beat frequency transducing signal frequency and extraneous institute stress application is:
dv
N＝-v
N[(1-P
e)ε+(α+ξ)ΔT]
Wherein, dV
NBe the beat signal frequency changing value that frequency meter detects, v
NBeat frequency transducing signal frequency values under the free state that detects for frequency meter, P
eBe effective elasto-optical coefficient of Er-doped fiber, ε is monitored stress intensity.Δ T resonator cavity variation of temperature, α is the thermal expansivity of optical fiber, ξ is the thermo-optical coeffecient of optical fiber.
Embodiment four: combine Fig. 3 that this embodiment is described; This embodiment is with the difference of embodiment three said optical fiber-wireless hybrid sensing and monitoring systems; Many longitudinal modes fiber laser sensor 5 adopts straight many longitudinal modes of cavate fiber laser sensor; Said straight many longitudinal modes of cavate fiber laser sensor is made up of fiber grating 15, Er-doped fiber 16 and fiber grating 17, and Er-doped fiber 16 is serially connected in the light path between fiber grating 15 and the fiber grating 17.
Pump light gets in the straight cavity structure through fiber grating 15; Amplification through er-doped light 16 and fiber grating 17 be reflected in the chamber resonance back and forth; Fiber grating 15 will reflect at the special wavelength light in the fiber grating reflected wavelength range, and the amplification of in the chamber, repeatedly vibrating forms multilongitudianl-mode laser.Multilongitudianl-mode laser with goods to auction information is through fiber grating 15 outputs.Er-doped fiber 16 is connecting fiber grating 15 and fiber grating 17, is used for physical quantitys such as extraneous stress, pressure, temperature are converted into the changing value of the beat frequency transducing signal frequency of straight many longitudinal modes of cavate fiber laser sensor generation.The relation of the variation of beat signal frequency and extraneous institute stress application is:
dv
N＝-v
N[(1-P
e)ε+(α+ξ)ΔT]
Wherein, dV
NBe the beat signal frequency changing value that frequency meter detects, v
NBeat frequency transducing signal frequency values under the free state that detects for frequency meter, P
eBe effective elasto-optical coefficient of Er-doped fiber, ε is monitored stress intensity.Δ T resonator cavity variation of temperature, α is the thermal expansivity of optical fiber, ξ is the thermo-optical coeffecient of optical fiber.
Embodiment five: the embodiment four described sensing schemes of utilizing as shown in Figure 4, we have measured the performance of wireless-optical fiber sensing technology.In the practical implementation, centre wavelength, bandwidth and the reflectivity of fiber grating 15 and fiber grating 17 are respectively 1545.8nm, 1550.1nm, 0.26nm, 0.25nm and 92%, 95%.In the test, a segment length is the resonator cavity that the Er-doped fiber 16 (Coractive EDF-HCO-4000) of 65.4cm is used as fiber laser, and at this moment, the vibration frequency of thanking of Multi-Longitudinal Mode laser is 163.1MHz.When pump power is 65mW, the output power of laser instrument is 2.795mW, and the beat signal of generation has covered from 163.1MHz in the 3.2GHz scope.A 12.5GHz gallium arsenide photodetector 6 is used as electrooptical device.The 2G GSM portable antenna of two vertical polarizations is as wireless transmitting-receiving equipments; Its working band scope is that 900-980MHz and 1710-1880MHz select two beat signals in the operating frequency range of wireless transmitting-receiving equipments as test signal for us, records beat frequency transducing signal frequency v before and after the wireless transmission
NThe relation curve that pairing beat frequency transducing signal frequency changes with the extraneous stress application ε of institute when being respectively 979.7MHz and 1795.5MHz.
The curve that " zero " forms among Fig. 4 is the response relation curve of beat frequency transducing signal frequency 979.7MHz and stress under the free state before the wireless transmission, and the response sensitivity of beat frequency and stress is 0.754kHz/ μ ε;
The curve that " " forms among Fig. 4 is the response relation curve of beat frequency transducing signal frequency 979.7MHz and stress under the free state after the wireless transmission, and the response sensitivity of beat frequency and stress is 0.761kHz/ μ ε;
The curve that " ◇ " forms among Fig. 4 is the response relation curve of beat frequency transducing signal frequency 1795.5MHz and stress under the free state before the wireless transmission, and the response sensitivity of beat frequency and stress is 1.38kHz/ μ ε;
The curve that " △ " forms among Fig. 4 is the response relation curve of beat frequency transducing signal frequency 1795.5MHz and stress under the free state after the wireless transmission, and the response sensitivity of beat frequency and stress is 1.39kHz/ μ ε.
As can be seen from Figure 4; Curve basically identical before and after the wireless transmission; Beat frequency transducing signal frequency before and after the wireless transmission does not receive the influence of wireless transmission; Be the influence that measured stress information can not receive wireless transmission basically, experiment effect is good, has embodied the reliability and the feasibility of this system.
Claims (4)
1. optical fiber-wireless hybrid sensing and monitoring system; It is characterized in that; It is made up of pump light source (1), isolator (3), wavelength division multiplexer (4), many longitudinal modes fiber laser sensor (5), photodetector (6), an amplifier (7), No. two amplifiers (10), wireless launcher (8), radio receiver (9) and frequency meter (11); The output terminal of pump light source (1) is connected the input end of isolator (3) through Transmission Fibers; The output terminal of isolator (3) is connected the input end of wavelength division multiplexer (4) through Transmission Fibers; The handshake terminal of wavelength division multiplexer (4) is connected the handshake terminal of many longitudinal modes fiber laser sensor (5); The output terminal of wavelength division multiplexer (4) is connected the input end of photodetector (6) through Transmission Fibers; The output terminal of photodetector (6) is connected the input end of an amplifier (7), and the output terminal of an amplifier (7) is connected the input end of wireless launcher (8), adopts wireless telecommunications to realize data transmission between wireless launcher (8) and the radio receiver (9); The output terminal of radio receiver (9) is connected the input end of No. two amplifiers (10), and the output terminal of No. two amplifiers (10) is connected the input end of frequency meter (11).
2. according to the said optical fiber of claim 1-wireless hybrid sensing and monitoring system, it is characterized in that pump light source (1) adopts 980nm or 1480nm pump light source.
3. according to the said optical fiber of claim 1-wireless hybrid sensing and monitoring system; It is characterized in that; Many longitudinal modes fiber laser sensor (5) adopts many longitudinal modes of ring cavity fiber laser sensor; Said many longitudinal modes of ring cavity fiber laser sensor is made up of fiber grating (12), coupling mechanism (13) and Er-doped fiber (14), and coupling mechanism (13) is serially connected in the light path between fiber grating (12) and the Er-doped fiber (14).
4. according to the said optical fiber of claim 1-wireless hybrid sensing and monitoring system; It is characterized in that; Many longitudinal modes fiber laser sensor (5) adopts straight many longitudinal modes of cavate fiber laser sensor; Said straight many longitudinal modes of cavate fiber laser sensor is made up of fiber grating (15), Er-doped fiber (16) and fiber grating (17), and Er-doped fiber (16) is serially connected in the light path between fiber grating (15) and the fiber grating (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102141895A CN102706375A (en) | 2012-06-27 | 2012-06-27 | Optical fiber-wireless mixed type sensing monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102141895A CN102706375A (en) | 2012-06-27 | 2012-06-27 | Optical fiber-wireless mixed type sensing monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102706375A true CN102706375A (en) | 2012-10-03 |
Family
ID=46899326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102141895A Pending CN102706375A (en) | 2012-06-27 | 2012-06-27 | Optical fiber-wireless mixed type sensing monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102706375A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575313A (en) * | 2013-11-21 | 2014-02-12 | 黑龙江大学 | Multi-longitudinal mode annular cavity laser sensor frequency division multiplexing device based on beat frequency technology |
| CN104729547A (en) * | 2013-12-24 | 2015-06-24 | ***通信集团公司 | Wireless optical fiber sensing device, information monitoring device and wireless optical fiber sensing system |
| CN106641739A (en) * | 2016-12-30 | 2017-05-10 | 天津市誉航润铭科技发展有限公司 | Water delivery pipe leakage locating system |
| CN110673202A (en) * | 2019-09-25 | 2020-01-10 | 山东省科学院激光研究所 | Remote large-scale sensing detection system based on optical fiber laser sensor |
| CN111273094A (en) * | 2020-01-21 | 2020-06-12 | 黑龙江大学 | Optical fiber sensing probe application system for detecting electrode charge amount of super capacitor and preparation method of optical fiber sensing probe |
| CN113991404A (en) * | 2021-10-21 | 2022-01-28 | 上海瀚宇光纤通信技术有限公司 | Noise signal generating device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261179A (en) * | 2008-04-16 | 2008-09-10 | 中国科学院上海光学精密机械研究所 | Fabry-perot interferometer frequency stability measurement method and measuring apparatus |
| CN101551571A (en) * | 2009-04-30 | 2009-10-07 | 天津理工大学 | Frequency synthesizer and frequency synthesis method based on optical beat technique |
| CN101858822A (en) * | 2010-05-14 | 2010-10-13 | 西安电子科技大学 | He-Ne laser frequency stability measuring system and measuring method thereof |
| CN102003970A (en) * | 2010-10-14 | 2011-04-06 | 南京大学 | Dynamic signal demodulation method for fiber laser sensor |
-
2012
- 2012-06-27 CN CN2012102141895A patent/CN102706375A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261179A (en) * | 2008-04-16 | 2008-09-10 | 中国科学院上海光学精密机械研究所 | Fabry-perot interferometer frequency stability measurement method and measuring apparatus |
| CN101551571A (en) * | 2009-04-30 | 2009-10-07 | 天津理工大学 | Frequency synthesizer and frequency synthesis method based on optical beat technique |
| CN101858822A (en) * | 2010-05-14 | 2010-10-13 | 西安电子科技大学 | He-Ne laser frequency stability measuring system and measuring method thereof |
| CN102003970A (en) * | 2010-10-14 | 2011-04-06 | 南京大学 | Dynamic signal demodulation method for fiber laser sensor |
Non-Patent Citations (3)
| Title |
|---|
| SHENGCHUN LIU等: "Simple hybrid wire–wireless fiber laser sensor by direct photonic generation of beat signal", 《APPLIED OPTICS》, vol. 50, no. 12, 20 April 2011 (2011-04-20), XP001562922, DOI: 10.1364/AO.50.001792 * |
| SHENGCHUN LIU等: "Wireless Fiber Laser Sensor Combining Photonic Generation Beat Frequency Demodulation Technology", 《SPIE-OSA-IEEE ASIA COMMUNICATIONS AND PHOTONICS》, vol. 8311, 13 November 2011 (2011-11-13) * |
| ZUOWEI YIN等: "Fiber Ring Laser Sensor for Temperature Measurement", 《JOURNAL OF LIGHTWAVE TECHNOLOGY》, vol. 28, no. 23, 1 December 2010 (2010-12-01), XP011339956, DOI: 10.1109/JLT.2010.2086046 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575313A (en) * | 2013-11-21 | 2014-02-12 | 黑龙江大学 | Multi-longitudinal mode annular cavity laser sensor frequency division multiplexing device based on beat frequency technology |
| CN103575313B (en) * | 2013-11-21 | 2016-08-31 | 黑龙江大学 | Many longitudinal modes annular chamber laser sensor frequency division multiplexing device based on beat frequency technology |
| CN105953826A (en) * | 2013-11-21 | 2016-09-21 | 充梦霞 | Laser sensor frequency division multiplexing device adopting optical fiber coupler and fiber bragg grating |
| CN106197495A (en) * | 2013-11-21 | 2016-12-07 | 充梦霞 | Use fibre optic isolater and the laser sensor frequency division multiplexing device of fiber grating |
| CN106197494A (en) * | 2013-11-21 | 2016-12-07 | 充梦霞 | A kind of laser sensor frequency division multiplexing device based on fiber grating |
| CN106197494B (en) * | 2013-11-21 | 2018-05-11 | 北京中科卓能电力科技有限公司 | A kind of laser sensor frequency division multiplexing device based on fiber grating |
| CN106197495B (en) * | 2013-11-21 | 2018-05-11 | 佛山市冰蓝科技有限公司 | Using fibre optic isolater and the laser sensor frequency division multiplexing device of fiber grating |
| CN104729547A (en) * | 2013-12-24 | 2015-06-24 | ***通信集团公司 | Wireless optical fiber sensing device, information monitoring device and wireless optical fiber sensing system |
| CN106641739A (en) * | 2016-12-30 | 2017-05-10 | 天津市誉航润铭科技发展有限公司 | Water delivery pipe leakage locating system |
| CN110673202A (en) * | 2019-09-25 | 2020-01-10 | 山东省科学院激光研究所 | Remote large-scale sensing detection system based on optical fiber laser sensor |
| CN111273094A (en) * | 2020-01-21 | 2020-06-12 | 黑龙江大学 | Optical fiber sensing probe application system for detecting electrode charge amount of super capacitor and preparation method of optical fiber sensing probe |
| CN113991404A (en) * | 2021-10-21 | 2022-01-28 | 上海瀚宇光纤通信技术有限公司 | Noise signal generating device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102706375A (en) | Optical fiber-wireless mixed type sensing monitoring system | |
| CN108663138B (en) | Distributed optical fiber temperature and vibration sensing system and method | |
| US5847816A (en) | Fiber optic micro-doppler ladar system and operating method therefor | |
| CN102322806B (en) | Brillouin optical time domain analyzer relevant to chaotic laser | |
| CN102759371B (en) | COTDR (coherent detection based optical time-domain reflectometry) fused long-distance coherent detection brilouin optical time-domain analyzer | |
| CN101242224B (en) | An optical fiber pipe monitoring system | |
| US20020075472A1 (en) | Optical fiber ceilometer for meteorological cloud altitude sensing | |
| CN104180833A (en) | Optical time domain reflectometer simultaneously sensing temperature and stress | |
| CN107917738A (en) | A kind of while measurement temperature, strain and the distributed optical fiber sensing system of vibration | |
| CN102937416B (en) | A kind of fully distributed fiber switched based on orthogonal polarisation state strains and vibration sensing method and device | |
| CN110220470B (en) | Single-ended chaotic Brillouin dynamic strain measurement device and method based on Rayleigh scattering | |
| CN102322810B (en) | Chaotic laser related Brillouin optical time domain analyzer integrated with optical fiber Raman amplifier | |
| CN102353963A (en) | Distance measuring system for optical domain based dual-loop optoelectronic oscillators | |
| WO2011050136A1 (en) | System and method for using coherently locked optical oscillator with brillouin frequency offset for fiber-optics-based applications | |
| CN102809430B (en) | Device for Brillouin optical time domain reflectometer based on optical phase-locked ring | |
| CN105093238A (en) | Transflective dual-edge doppler wind lidar based on single-cavity F-P interferometer and single detector | |
| CN106154289A (en) | Direct anemometry laser radar based on difference excited Brillouin enhancement effect | |
| CN203310428U (en) | Distributed Brillouin optical fiber sensing system based on coherent detection | |
| CN103837165A (en) | Brillouin time-domain analysis system based on Brillouin laser and automatic heterodyne detection | |
| WO2019005258A4 (en) | A cw lidar wind velocity sensor for operation on a stratospheric vehicle | |
| CN103076112A (en) | Parameter-measuring system for single side band distributed optical fiber sensing system | |
| CN103337776B (en) | All-optical fiber type self-mixing distance measuring system of laser | |
| CN103323041A (en) | Distributed Brillouin optical fiber sensing system based on coherent detection | |
| CN103575313A (en) | Multi-longitudinal mode annular cavity laser sensor frequency division multiplexing device based on beat frequency technology | |
| CN112698355A (en) | Multi-wavelength coherent laser radar based on electro-optical modulation technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121003 |