CN103308082A - Sensing structure of single ring embedded resonant cavity coupling M-Z interferometer - Google Patents
Sensing structure of single ring embedded resonant cavity coupling M-Z interferometer Download PDFInfo
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- CN103308082A CN103308082A CN201310250888XA CN201310250888A CN103308082A CN 103308082 A CN103308082 A CN 103308082A CN 201310250888X A CN201310250888X A CN 201310250888XA CN 201310250888 A CN201310250888 A CN 201310250888A CN 103308082 A CN103308082 A CN 103308082A
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Abstract
The invention provides a sensing structure of a single ring embedded resonant cavity coupling M-Z interferometer. The sensing structure comprises a laser device, an attenuator, an isolator, a polarization controller, a first coupler, a phase modulator and a detector. The sensing sensitivity is improved by aid of a chromatic dispersion structure and phase biasing, and the structure of the single ring embedded resonant cavity coupling M-Z interferometer can save optical fibers for dozens of times of ring lengths compared with the traditional M-Z interferometer structure with the same interferometer sensitivity. The interferometer has higher sensitivity by being provided with the sensing structure for sensing on the same condition, meanwhile space needed by installation equipment can be reduced, and device stability can be improved. In addition, feedback waveguides of a single ring embedded resonant cavity are adopted to serve as sensing elements so that sensitivity can be flexibly selected by selecting the lengths of the feed waveguides without being limited by the Q value of the resonant cavity.
Description
Technical field
What the present invention relates to is a kind of high sensitivity sensing arrangement that is not subject to the Q value of cavity, is specifically related to the sensing arrangement that a kind of monocycle is inlayed resonator cavity coupling M-Z interferometer.
Background technology
Interferometer is widely used in metering, optical sensing, aspects such as quantum information processing and biomedical engineering, fibre optic interferometer is because the performance of the various excellences of himself is (little as volume, in light weight, simple in structure, little power consumption, be convenient to link to each other etc. with computing machine), measuring temperature, refractive index, speed, the acceleration sound field, electric field, pressure, strain, aspects such as spectral absorption have a wide range of applications, and at biology, chemistry, and environmental monitoring field, at high voltage, under the condition of strong electromagnetic, perhaps in narrow and small airtight space, fibre optic interferometer has monitoring out of the ordinary, measurement capability.Development along with society, many times traditional M-Z interferometer can't satisfy high-precision measurement requirement, we have proposed a kind of monocycle and have inlayed resonator cavity coupling M-Z interferometer sensing arrangement, both can obtain very high sensitivity, are not subject to the Q value of resonator cavity again.
Summary of the invention
The object of the present invention is to provide a kind of monocycle to inlay the sensing arrangement of resonator cavity coupling M-Z interferometer.
The object of the present invention is achieved like this: a kind of monocycle is inlayed the sensing arrangement of resonator cavity coupling M-Z interferometer, comprise laser instrument, attenuator, isolator, Polarization Controller, first coupling mechanism, phase-modulator and detector, laser instrument is connected with attenuator by optical fiber, attenuator is connected with isolator by optical fiber, isolator is connected with first coupling mechanism by optical fiber, optical fiber between isolator and first coupling mechanism is provided with Polarization Controller, first coupling mechanism is connected with second coupling mechanism by optical fiber, second coupling mechanism and the 3rd coupling mechanism connect to form monocycle by optical fiber and inlay cavity resonator structure, connect by optical fiber between the 3rd coupling mechanism and the 4th coupling mechanism, the 4th coupling mechanism is connected with detector by optical fiber, and the optical fiber between first coupling mechanism and the detector is provided with phase-modulator.
The present invention also has some technical characterictics like this:
Described optical fiber is general single mode fiber Corning SMF-28.
The coupling coefficient of described the 4th coupling mechanism is that the coupling coefficient of 0.707, the second coupling mechanism and the 3rd coupling mechanism is chosen between 0-1, but will guarantee that monocycle is inlayed between feedback waveguide in the cavity resonator structure and the fiber optic loop is in weak-coupling state.
Monocycle is inlayed feedback waveguide in the cavity resonator structure as sensing unit.
The position of phase-modulator value mutually is pi/2 or 3 pi/2s.The tunable optical fiber laser output of employed optical signals 1550nm.
The present invention utilizes chromatic dispersion structure and phase bias to improve sensing sensitivity, reach same interferometer sensitivity, monocycle is inlayed the structure of resonator cavity coupling M-Z fibre optic interferometer can save tens times of optical fiber that ring is long with respect to traditional M-Z fibre optic interferometer structure.Utilize this structure to carry out sensing, then under same condition, have higher sensitivity, utilize this structure can reduce the erecting equipment requisite space, improve the stability of device.Simultaneously, the feedback waveguide that the employing monocycle is inlayed resonator cavity can be selected sensitivity flexibly by selecting the feedback waveguide length, and not be subject to the Q value of resonator cavity as sensing unit.
Description of drawings
Fig. 1 is the structural representation of invention.
Embodiment
Further illustrate substantive distinguishing features of the present invention and marked improvement below by specific embodiment, but content of the present invention not only is confined to the following examples:
A kind of monocycle is inlayed the sensing arrangement of resonator cavity coupling M-Z interferometer, compare with conventional interference instrument sensing arrangement, introduce the monocycle with anomalous dispersion characteristic and inlayed cavity resonator structure and phase-modulator, adopting monocycle to inlay the part of resonator cavity (feedback waveguide) as sensing unit simultaneously, is innovative point of the present invention.The light that is sent by laser instrument 1 is divided into two bundles behind isolator 2, attenuator 3, Polarization Controller 4, first coupling mechanism 5, set out on a journey to inlay behind the cavity resonator structure with following road light through phase-modulator 6 through monocycle to output to detector 7 through the 4th coupling mechanism jointly.Coupling part is wherein all finished by optical fiber.The light of setting out on a journey enters monocycle by second coupling mechanism 8 and inlays cavity resonator structure, and this structure is made up of second coupling mechanism 8 and the 3rd coupling mechanism 9.And via 9 these output port outputs of the 3rd coupling mechanism.Be that second coupling mechanism 8, the 3rd coupling mechanism 9 are chosen suitable coupling coefficient, monocycle this output port of inlaying cavity resonator structure just can produce fast light so, is connected to detector 7 by optical fiber and the 4th coupling mechanism 10.
The wherein tunable optical fiber laser of optical signals 1550nm output, the coupling coefficient of the 4th coupling mechanism 10 is 0.707.Monocycle is inlayed cavity resonator structure and is made up of feedback waveguide and fiber optic loop and second coupling mechanism 8, the 3rd coupling mechanism 9, the 4th coupling mechanism 10, the optical fiber model is SMF-28, the coupling coefficient of second coupling mechanism 8, the 3rd coupling mechanism 9 can be chosen between 0-1, but guarantee that monocycle inlays a little less than the feedback waveguide and the coupling between the fiber optic loop in the cavity resonator structure, the position phase bias of phase-modulator is pi/2 or 3 pi/2s.If will obtain the length that higher sensing sensitivity will increase the feedback waveguide.
Claims (6)
1. a monocycle is inlayed the sensing arrangement of resonator cavity coupling M-Z interferometer, comprise laser instrument (1), attenuator (2), isolator (3), Polarization Controller (4), first coupling mechanism (5), phase-modulator (6) and detector (7), it is characterized in that: laser instrument (1) is connected with attenuator (2) by optical fiber, attenuator (2) is connected with isolator (3) by optical fiber, isolator (3) is connected with first coupling mechanism (5) by optical fiber, optical fiber between isolator (3) and first coupling mechanism (5) is provided with Polarization Controller (4), first coupling mechanism (5) is connected with second coupling mechanism (8) by optical fiber, second coupling mechanism (8) and the 3rd coupling mechanism (9) connect to form monocycle by optical fiber and inlay cavity resonator structure, connect by optical fiber between the 3rd coupling mechanism (9) and the 4th coupling mechanism (10), the 4th coupling mechanism (10) is connected with detector (7) by optical fiber, and the optical fiber between first coupling mechanism (5) and the detector (7) is provided with phase-modulator (6).
2. a kind of monocycle according to claim 1 is inlayed the sensing arrangement of resonator cavity coupling M-Z interferometer, and it is characterized in that: described optical fiber is general single mode fiber Corning SMF-28.
3. a kind of monocycle according to claim 1 is inlayed the sensing arrangement of resonator cavity coupling M-Z interferometer, it is characterized in that: the coupling coefficient of described the 4th coupling mechanism (10) is 0.707, the coupling coefficient of second coupling mechanism (8) and the 3rd coupling mechanism (9) is chosen between 0-1, but will guarantee that monocycle is inlayed between feedback waveguide in the cavity resonator structure and the fiber optic loop is in weak-coupling state.
4. a kind of monocycle according to claim 1 is inlayed the sensing arrangement of resonator cavity coupling M-Z interferometer, it is characterized in that: monocycle is inlayed feedback waveguide in the cavity resonator structure as sensing unit.
5. a kind of monocycle according to claim 1 is inlayed the sensing arrangement of resonator cavity coupling M-Z interferometer, it is characterized in that: the position of phase-modulator value mutually is pi/2 or 3 pi/2s.
6. a kind of monocycle according to claim 1 is inlayed the sensing arrangement of resonator cavity coupling M-Z interferometer, it is characterized in that: the tunable optical fiber laser output of employed optical signals 1550nm.
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Cited By (7)
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|---|---|---|---|---|
| CN105157693A (en) * | 2015-09-22 | 2015-12-16 | 深圳大学 | Annular resonant cavity and resonant fiber-optic gyroscope |
| CN105203135A (en) * | 2015-10-21 | 2015-12-30 | 哈尔滨工业大学 | Straight waveguide, feedback waveguide and circle-straight waveguide high-sensitivity resonance system |
| CN105466410A (en) * | 2015-11-06 | 2016-04-06 | 东北林业大学 | Sensitivity-tunable interferometric fiber optic gyroscope based on fiber ring resonator |
| CN105547277A (en) * | 2016-03-07 | 2016-05-04 | 东北林业大学 | Fiber-optic gyroscope based on self-interference optical fiber ring resonator |
| CN106595901A (en) * | 2016-12-21 | 2017-04-26 | 东北林业大学 | High-sensitivity temperature sensor based on composite micro-nanofiber resonant cavity |
| CN107014493A (en) * | 2017-04-19 | 2017-08-04 | 哈尔滨工业大学 | A kind of direct measurement device and method of photon polarization state density matrix |
| CN107255742A (en) * | 2017-05-25 | 2017-10-17 | 杭州电子科技大学 | A kind of Whispering-gallery-mode optical resonator alternating voltage sensor-based system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105157693B (en) * | 2015-09-22 | 2019-04-02 | 深圳大学 | A kind of ring resonator and its resonance type optical fiber gyro |
| CN105157693A (en) * | 2015-09-22 | 2015-12-16 | 深圳大学 | Annular resonant cavity and resonant fiber-optic gyroscope |
| CN105203135B (en) * | 2015-10-21 | 2017-08-25 | 哈尔滨工业大学 | A kind of high-sensitivity resonance system based on straight wave guide feedback wave lead ring straight wave guide |
| CN105203135A (en) * | 2015-10-21 | 2015-12-30 | 哈尔滨工业大学 | Straight waveguide, feedback waveguide and circle-straight waveguide high-sensitivity resonance system |
| CN105466410B (en) * | 2015-11-06 | 2018-08-31 | 东北林业大学 | The adjustable interference type optical fiber gyroscope of sensitivity based on fiber annular resonant cavity |
| CN105466410A (en) * | 2015-11-06 | 2016-04-06 | 东北林业大学 | Sensitivity-tunable interferometric fiber optic gyroscope based on fiber ring resonator |
| CN105547277B (en) * | 2016-03-07 | 2018-08-28 | 东北林业大学 | Optical fibre gyro based on self-interference fiber annular resonant cavity |
| CN105547277A (en) * | 2016-03-07 | 2016-05-04 | 东北林业大学 | Fiber-optic gyroscope based on self-interference optical fiber ring resonator |
| CN106595901A (en) * | 2016-12-21 | 2017-04-26 | 东北林业大学 | High-sensitivity temperature sensor based on composite micro-nanofiber resonant cavity |
| CN106595901B (en) * | 2016-12-21 | 2018-11-20 | 东北林业大学 | High-sensitivity temperature sensor based on compound micro-nano fiber resonant cavity |
| CN107014493A (en) * | 2017-04-19 | 2017-08-04 | 哈尔滨工业大学 | A kind of direct measurement device and method of photon polarization state density matrix |
| CN107014493B (en) * | 2017-04-19 | 2018-09-07 | 哈尔滨工业大学 | A kind of direct measuring device and method of photon polarization state density matrix |
| CN107255742A (en) * | 2017-05-25 | 2017-10-17 | 杭州电子科技大学 | A kind of Whispering-gallery-mode optical resonator alternating voltage sensor-based system |
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Application publication date: 20130918 |