CN205593917U - Detecting system of laser instrument based on receive er -doped fiber a little - Google Patents
Detecting system of laser instrument based on receive er -doped fiber a little Download PDFInfo
- Publication number
- CN205593917U CN205593917U CN201620189967.3U CN201620189967U CN205593917U CN 205593917 U CN205593917 U CN 205593917U CN 201620189967 U CN201620189967 U CN 201620189967U CN 205593917 U CN205593917 U CN 205593917U
- Authority
- CN
- China
- Prior art keywords
- fiber
- micro
- laser instrument
- doped
- nano
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a detecting system of laser instrument based on receive er -doped fiber a little, is this laser instrument distributed bragg reflection receive fiber laser a little, the laser instrument includes that it makes active medium to receive optic fibre by declining of er -doped, and single mode fiber carves the bragg grating and constitutes jointly as the resonant cavity, the declining of er -doped is received optic fibre and is served as reasons the cubic glass of an er -doped and use sapphire fiber and draw through direct tensile method and form, write in the tail optical fiber length imbalance that two sections single mode fiber that select formed bragg grating, every bragg grating both ends respectively into through the method of ultraviolet irradiation phase place mask plate, the utility model discloses the fiber laser resonant cavity is placed in to suddenly the dying by force of optic fibre of will receiving a little, and detectivity can improve several orders of magnitude, has realized laser output and sensing integration.
Description
Technical field
This utility model relates to optical-fiber laser sensing detection technical field, particularly relates to a kind of laser instrument based on micro-nano Er-doped fiber
Detecting system.
Background technology
In industrial and agricultural production and daily life, how to poisonous, harmful, inflammable, that explosion hazard gases is carried out is accurate, quickly detect
Become one of major issue being badly in need of solution.These gas component content may in 1/1000000th magnitudes or following, for
These trace gas then need highly sensitive gas-detecting device.Fiber gas sensor with intrinsic safety, electromagnetism interference,
High temperature high voltage resistant, the advantage such as easy remote transmission and multiplexing is increasingly paid attention to by research worker.Evanscent field type optical fiber gas sensing
Device is to utilize in gas to be measured and optical fiber to transmit the interaction of light field to realize a kind of novel sensor of gas sensing.With other
Fiber gas sensor is compared, and has that structure is relatively easy, cost is relatively low, can intersect resolution and form the advantages such as distributed sensing.
Evanscent field type fiber gas sensor relies on its particular advantages and application potential, shows up prominently, cause people's in gas detecting
Pay attention to and research.The evanscent field type gas sensor that appears as of micro-nano fiber provides huge development space.When fibre diameter connects
During nearly micro-nano magnitude, light field has a big chunk Energy distribution form with evanscent field outside optical fiber to be transmitted, this part energy
Amount ratio even when occurring to interact with external environment, can be used to build ultra-compact sensor more than 90%.Micro-
The relative maturity that the technology of preparing of nano fiber and the manufacturing technology of micro-nano fiber device have developed, Optics Express, vol.
14(12),pp.5055-5060,2006,Shi L,Chen X F,Liu H J,et al.“Fabrication of submicron-diameter
Silica fibers using electric strip heater, " propose to utilize electrical heating bonding jumper as the method for fused optic fiber thermal source, it is thus achieved that
Up to 10cm and diameter less than the micro-nano fiber of 1 μm；Nanotechnology,vol.16,pp.1445-1448,2005,L.Tong,
J.Lou, Z.Ye, G.T.Svacha, and E.Mazur. " Self-modulated taper drawing of silica nanowires, " proposes
Self-regulation pulling method, profit can prepare the little micro-nano fiber to 20nm of diameter in this way.Appl.Phys.Lett,vol.
86(15),pp.151122,2005,W.Liang,Y.Y.Huang,Y.Xu,et al.“Highly sensitive fiber Bragg grating
Refractive index sensors, " propose to utilize two micro-nano fiber Bragg gratings to construct a F-P resonant cavity, and utilize humorous
Shake the Mobile solution of chamber resonant wavelength for strength of fluid sensor.But up to the present, about gas based on micro-nano fiber
Research report in terms of sensor is less, and main reason is owing to the drawing length of micro-nano fiber falls short of, as evanscent field type
Absorbing path when gas sensor uses shorter, detectivity is restricted.
The most conventional gas detection method middle infrared spectrum absorption process is constantly subjected to extensive concern, and its key technology has Difference Absorption
Spectral technique, tunable diode laser absorption spectroscopy technology and optoacoustic spectroscopy etc..Traditional absorption techniques is due to gas
Effectively absorb light path limited, so its detection sensitivity will not be the highest.
In a word, existing gas detecting sensitivity, quickly, stable on be not met by current demand, therefore, need one badly
Plant new active gas detecting system.
Utility model content
For solving the deficiency that prior art exists, the utility model discloses the detection of a kind of laser instrument based on micro-nano Er-doped fiber
System, this utility model utilizes micro-nano to mix Er3+Optical fiber, produces Distributed Bragg Reflection-micro-nano fiber laser instrument (Distributed
Bragg Reflector-microfiber laser, is called for short DBR-MFL), evanscent field type can be developed into DBR-MFL for sensing primitive
Fiber gas sensor, adulterate Er3+Fiber gain spectral limit wider, with mixing Er3+The laser output wavelength of optical fiber fabrication is adjustable
Humorous scope covers acetylene (1532nm), ammonia (1544nm), carbon monoxide (1567nm), carbon dioxide (1573nm), sulfuration
The common gas such as hydrogen (1578m).The strong evanscent field field of micro-nano fiber is placed in resonant cavity of fibre-optical laser by this sensor, detection spirit
Sensitivity can improve several order of magnitude, it is achieved that laser exports with sensing integrated.This utility model aim to provide quick, stable,
Can at a distance on-line checking, there is high detection sensitivity and very big dynamic range.
For achieving the above object, concrete scheme of the present utility model is as follows:
The detecting system of a kind of laser instrument based on micro-nano Er-doped fiber, this system is used for detecting active gas, including encapsulated
Distributed Bragg Reflection-micro-nano fiber laser instrument, this laser instrument is connected with the input of wavelength division multiplexer, wavelength division multiplexer defeated
Going out end point two-way, a road is connected with pump light source, and another road is connected with isolator, photodetector and lock-in amplifier successively,
Described lock-in amplifier is also connected with the input of processor, the outfan of processor output low frequency sawtooth signal and high frequency respectively
Sine wave signal, described low frequency sawtooth signal and high_frequency sine wave signal all transmit to adder and carry out computing, adder defeated
Go out to be connected to laser instrument；
Processor produces a low frequency sawtooth signal and a high_frequency sine wave signal, a low frequency sawtooth signal and one simultaneously
Individual high_frequency sine wave signal accesses the air chamber of laser instrument by adder, by changing the size of Piezoelectric Ceramic voltage in air chamber
Realize the modulation to Output of laser wavelength, simultaneously by providing the high_frequency sine wave signal two of a laser instrument to lock-in amplifier
The reference signal of frequency multiplication, carries out demodulation of phase locking and obtains containing the second harmonic signal absorbing gas concentration information, finally by process
Device multiple repairing weld is also averaging processing, and is shown gas concentration in real time by host computer.
Further, described pump light source is connected with the input of wavelength division multiplexer by its band tail optical fiber；Laser instrument is pasted fixing
On strip piezoelectric ceramics；The tail optical fiber of laser instrument is connected with the common port of wavelength division multiplexer；The outfan of wavelength division multiplexer is even
Receiving the positive input of isolator, the outfan of isolator connects into air processing unit.
Further, this air processing unit includes that photodetector, lock-in amplifier and field programmable gate array process
Device, wherein the input of photodetector is connected with the outfan of isolator, the outfan of photodetector and lock-in amplifier
Input is connected, and the outfan of lock-in amplifier accesses field programmable gate array processor.
Further, laser instrument based on micro-nano Er-doped fiber is Distributed Bragg Reflection-micro-nano fiber laser instrument, described laser
Device includes being made active medium by the micro-nano fiber of er-doped, and single-mode fiber is carved into Bragg grating and collectively forms as resonator cavity；
The micro-nano fiber of described er-doped is formed by the drawing of uniaxial direct tensile method for being used sapphire fiber by one piece of er-doped both bulk glasses；
Two section single-mould fibers chosen by the method write of ultraviolet light irradiation phase mask plate form Bragg grating respectively, each
The tail optical fiber length at Bragg grating two ends is unequal；
The micro-nano fiber two ends that core diameter is stretched to set the er-doped of below numerical value are respectively connected to a Bragg grating, two Bradleys
Lattice grating incoming end is one end that relatively short-tail is fine, Bragg grating has multiple fusion point, Bragg grating is additionally provided with coating
Layer.
Further, the micro-nano fiber two ends being stretched to set the er-doped of below numerical value are respectively connected to a Bragg grating, connect
Entering method is that heat sealing machine is directly fused.
Further, the core diameter of the micro-nano fiber of described er-doped is below 1 μm.
Further, when encapsulation, Distributed Bragg Reflection-micro-nano fiber laser instrument is pasted and fixed on strip piezoelectric ceramics
On so that the micro-nano fiber of middle er-doped and to have peeled the Bragg grating part of coat off the most unsettled in the middle of piezoelectric ceramics
Space in, paste position be near grating and the tail optical fiber part of having peeled coat off, by Distributed Bragg Reflection in stickup-
The piezoelectric ceramics of micro-nano fiber laser instrument is fixed in metal enclosed container formation sealed air chamber, and air chamber passes through distributed cloth with extraneous
The tail optical fiber of glug reflection-micro-nano fiber laser instrument is attached.
Further, the micro-nano fiber of er-doped is naked fibre, and light gate part and the relatively short-tail fibre part of two Bragg gratings are
Peel the naked fibre of coat off.
Laser instrument based on micro-nano Er-doped fiber is when making:
Choosing one piece of er-doped both bulk glasses, using sapphire fiber, by uniaxial direct tensile method, er-doped both bulk glasses to be drawn into fibre core straight
Footpath is less than the micro-nano fiber of the er-doped setting numerical value；
Choose two section single-mould fibers, irradiated the method write Bragg grating of phase mask plate by ultraviolet light, it is desirable to Prague light
Grid one end tail optical fiber is shorter, and one end tail optical fiber is longer；
Being respectively connected to Bragg grating at the micro-nano fiber two ends being stretched to set the er-doped of below numerical value, cut-in method is heat sealing machine
Directly fused, two Bragg grating incoming ends are one end that relatively short-tail is fine, and one end of longer tail optical fiber is formed as distributed Bradley
The tail optical fiber at lattice reflection-micro-nano fiber laser instrument two ends；
Wherein the micro-nano fiber of er-doped is naked fibre, and light gate part and the relatively short-tail fibre part of two Bragg gratings are and peel painting off
The naked fibre of coating.
The method of work of detecting system based on micro-nano Er-doped fiber, this system is used for detecting active gas, comprises the following steps:
Distributed Bragg Reflection-micro-nano fiber the laser of the Output of laser wavelength adapted with this gas is chosen according to gas to be measured
Device, as sensing primitive, uses the pumping source adapted with this gas to be measured, in the resonator cavity of this laser instrument, is producing laser
During some energy laser with spill over outside the form of evanscent field the air of fibre core outer surface is propagated and with gas phase to be measured
Interaction；
Now laser instrument is fixed on piezoelectric ceramics and exposed in gas to be measured, by changing the big of Piezoelectric Ceramic voltage
The little modulation realized Output of laser wavelength, when the length scanning of this part light crosses GAS ABSORPTION peak to be measured, laser instrument produces
Laser energy can produce a certain proportion of decay because of GAS ABSORPTION；
Final laser instrument Output of laser is gone forward side by side by photodetector reception through one end of wavelength division multiplexer output and after isolator
Row opto-electronic conversion；
Producing current signal and be converted to voltage signal, amplified entrance lock-in amplifier by negative feedback amplifier circuit, scene can be compiled
Journey logic gate array processor produces a low frequency sawtooth simultaneously and a high_frequency sine wave accesses air chamber by adder, passes through
Change the size of Piezoelectric Ceramic voltage in air chamber and realize the modulation to Output of laser wavelength；
By providing one to carry out demodulation of phase locking with the reference signal of high_frequency sine wave signal two frequency multiplication of laser instrument to lock-in amplifier
Obtain containing the second harmonic signal absorbing gas concentration information, finally by processor multiple repairing weld and be averaging processing, logical
Cross host computer and show gas concentration in real time.
The beneficial effects of the utility model:
In this utility model, first, it is the features such as single mode single-frequency, low noise, narrow linewidth that DBR-MFL not only has Output of laser,
Also there is strong evanscent field characteristic；Secondly, the strong evanscent field field of micro-nano fiber is placed in resonant cavity of fibre-optical laser, detects sensitive
Degree can improve several order of magnitude, it is achieved that laser exports with sensing integrated；3rd, encapsulating structure design is simple, anti-electromagnetism
Interference, highly sensitive, dynamic range is big, and poisonous and harmful flammable explosive gas can realize the detection of long-range real-time online.
Accompanying drawing explanation
Fig. 1 is the DBR-MFL structural representation in this utility model；
Fig. 2 is the encapsulation design structural section figure of the DBR-MFL in this utility model；
Fig. 3 is based on mixing Er in this utility model3+The structural representation of the active gas detecting system of micro-nano optical fiber evanescent field characteristic；
In figure, 1-1, single-mode fiber coat, 1-2, Bragg grating, 1-3, er-doped (Er3+) micro-nano fiber, 1-4, welding
Point, 1, encapsulate DBR-MFL, 2, wavelength division multiplexer (WDM), 3,980nm pump light source (LD), 4, isolator (ISO),
5, photodetector, 6, lock-in amplifier, 7, field programmable gate array (FPGA) processor, 8, low frequency sawtooth
Signal, 9, high_frequency sine wave signal, 10, adder, 11, DBR-MFL, 12, piezoelectric ceramics, 13, nitrogen, 14, tail
Fibre, 15, metal enclosed container.
Detailed description of the invention:
Below in conjunction with the accompanying drawings this utility model is described in detail:
Embodiment 1:
This utility model embodiment 1 is as it is shown on figure 3, one is based on mixing Er3+The active gas detecting of micro-nano optical fiber evanescent field characteristic
System, including 980nm pump light source (LD) 3, wavelength division multiplexer (WDM) 2, isolator (ISO) 4, encapsulate DBR-MFL 1,
And air processing unit.980nm pump light source 3 is inputted by the 980nm of its band tail optical fiber with wavelength division multiplexer (WDM) 2
End is connected；The common port of wavelength division multiplexer (WDM) 2 is connected with the tail optical fiber encapsulating DBR-MFL1；Wavelength division multiplexer (WDM) 2
1550nm end receive the positive input of isolator (ISO) 4, the other end of isolator (ISO) 4 connects into air processing unit；
Air processing unit includes photodetector 5, lock-in amplifier 6 and field programmable gate array (FPGA) processor 7, its
The input of middle photodetector 5 is connected with isolator (ISO) 4, the outfan of photodetector 5 and lock-in amplifier 6 phase
Even, the outfan of lock-in amplifier 6 accesses field programmable gate array (FPGA) processor 7, and FPGA produces one simultaneously
Low frequency sawtooth signal 8 and a high_frequency sine wave signal 9 are accessed by adder 10 and encapsulate DBR-MFL 1, by changing
Change has encapsulated the size of Piezoelectric Ceramic voltage in DBR-MFL 1 and has realized the modulation to Output of laser wavelength, simultaneously by giving
Lock-in amplifier 6 provides the reference signal of high_frequency sine wave signal 9 two frequency multiplication, carries out demodulation of phase locking and obtains containing absorbing gas
The second harmonic signal of bulk concentration information, finally by FPGA multiple repairing weld and is averaging processing in underlying programs, passes through
Upper computer software Treatment Analysis also shows gas concentration in real time.
Gas the most to be measured is acetylene, and DBR-MFL Output of laser wavelength is 1532nm.Photodetector is PIN photodetection
Device.
Operation principle: this utility model is the DBR-MFL choosing Output of laser wavelength near gas sample characteristic absorption peak to be measured, such as
When gas sample to be measured is acetylene, chooses DBR-MFL that Output of laser wavelength is 1532nm as sensing primitive, use 980nm pump
Source, Pu, in DBR-MFL resonator cavity, produce in laser process the laser having energy greatly with the form of evanscent field outside
Spill over and the air of fibre core outer surface is propagated and interacts with gas acetylene to be measured.Now DBR-MFL is fixed on piezoelectric ceramics
Upper and exposed in gas to be measured, the modulation to Output of laser wavelength can be realized by the size changing Piezoelectric Ceramic voltage,
When the length scanning of this part light crosses acetylene gas absworption peak, the laser energy that DBR-MFL produces can produce because of GAS ABSORPTION
A certain proportion of decay.Final laser instrument Output of laser through the 1550nm end of WDM export and after isolator (ISO) by
Photodetector receives and carries out opto-electronic conversion.Produce current signal and be converted to voltage signal by negative feedback amplifier circuit.Amplified
Rear entrance 7230 lock-in amplifier, by providing the reference signal of a frequency same with laser high-frequency modulated signal to lock-in amplifier
Carry out demodulation of phase locking and obtain containing the second harmonic signal absorbing gas concentration information, finally by FPGA multiple repairing weld and the end of in
Layer program is averaging processing, by upper computer software Treatment Analysis and show gas concentration in real time.
As it is shown in figure 1, DBR-MFL11 is by doping Er3+Micro-nano fiber make active medium, general single mode fiber is carved into Bragg
Grating 1-2 collectively forms as resonator cavity.
Laser instrument based on micro-nano Er-doped fiber, this laser instrument is Distributed Bragg Reflection-micro-nano fiber laser instrument, described laser
Device includes by er-doped (Er3+) micro-nano fiber 1-3 makees active medium, single-mode fiber is carved into Bragg grating 1-2 as the common structure of resonator cavity
Become；
Described er-doped (Er3+) micro-nano fiber 1-3 is for being used sapphire fiber by uniaxial direct tensile farad by one piece of er-doped both bulk glasses
System forms；
Two section single-mould fibers chosen by the method write of ultraviolet light irradiation phase mask plate form Bragg grating 1-2, often respectively
The tail optical fiber length at individual Bragg grating 1-2 two ends is unequal；
Core diameter er-doped (the Er less than 1 μm will be stretched to3+) micro-nano fiber 1-3 two ends are respectively connected to a Bragg grating
1-2, two Bragg grating 1-2 incoming ends are one end that relatively short-tail is fine, Bragg grating 1-2 has and multiple welds a 1-4,
It is additionally provided with coat 1-1 on Bragg grating 1-2.
As in figure 2 it is shown, DBR-MFL11 is pasted and fixed on strip piezoelectric ceramics 12 so that middle mixes Er3+Micro-nano
Optical fiber and to have peeled the Bragg light gate part of coat off the most unsettled in the space in the middle of piezoelectric ceramics 12, paste position is for leaning on
Dipped beam grid and the tail optical fiber part of having peeled coat off, the piezoelectric ceramics 12 that will paste upper DBR-MFL11 is fixed into metal enclosed
Forming sealed air chamber in container 15, air chamber enters with the extraneous tail optical fiber 14 (ordinary optic fibre of band coat) by DBR-MFL
Row connects.When gas to be measured is nitrogen 13, nitrogen 13 inputs to metal enclosed container 15.
Embodiment 2: identical with real-time example 1, gas the most to be measured is ammonia, and DBR-MFL Output of laser wavelength is 1544nm.
Embodiment 3: identical with real-time example 1, gas the most to be measured is carbon monoxide, and DBR-MFL Output of laser wavelength is
1567nm。
Embodiment 4: identical with real-time example 1, gas the most to be measured is carbon dioxide, and DBR-MFL Output of laser wavelength is
1573nm。
Although detailed description of the invention of the present utility model is described by the above-mentioned accompanying drawing that combines, but not this utility model is protected
The restriction of scope, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, art technology
Personnel need not to pay various amendments or deformation that creative work can make still within protection domain of the present utility model.
Claims (7)
1. the detecting system of a laser instrument based on micro-nano Er-doped fiber, it is characterized in that, this system is used for detecting active gas, including the Distributed Bragg Reflection encapsulated-micro-nano fiber laser instrument, this laser instrument is connected with the input of wavelength division multiplexer, the outfan of wavelength division multiplexer divides two-way, one tunnel is connected with pump light source, another road successively with isolator, photodetector and lock-in amplifier are connected, described lock-in amplifier is also connected with the input of processor, the outfan of processor output low frequency sawtooth signal and high_frequency sine wave signal respectively, described low frequency sawtooth signal and high_frequency sine wave signal all transmit to adder and carry out computing, the output of adder is connected to laser instrument.
The detecting system of a kind of laser instrument based on micro-nano Er-doped fiber, is characterized in that, described pump light source is connected with the input of wavelength division multiplexer by its band tail optical fiber；Laser instrument is pasted and fixed on strip piezoelectric ceramics；The tail optical fiber of laser instrument is connected with the common port of wavelength division multiplexer；The outfan of wavelength division multiplexer is connected to the positive input of isolator, and the outfan of isolator connects into air processing unit.
A kind of detecting system of laser instrument based on micro-nano Er-doped fiber, it is characterized in that, this air processing unit includes photodetector, lock-in amplifier and field programmable gate array processor, wherein the input of photodetector is connected with the outfan of isolator, the outfan of photodetector is connected with lock-in amplifier input, and the outfan of lock-in amplifier accesses field programmable gate array processor.
A kind of detecting system of laser instrument based on micro-nano Er-doped fiber, it is characterized in that, laser instrument based on micro-nano Er-doped fiber is Distributed Bragg Reflection-micro-nano fiber laser instrument, described laser instrument includes being made active medium by the micro-nano fiber of er-doped, and single-mode fiber is carved into Bragg grating and collectively forms as resonator cavity；
The micro-nano fiber of described er-doped is formed by the drawing of uniaxial direct tensile method for being used sapphire fiber by one piece of er-doped both bulk glasses；
Two section single-mould fibers chosen by the method write of ultraviolet light irradiation phase mask plate form Bragg grating respectively, and the tail optical fiber length at each Bragg grating two ends is unequal；
The micro-nano fiber two ends being stretched to set the er-doped below numerical value are respectively connected to a Bragg grating, and two Bragg grating incoming ends are one end that relatively short-tail is fine, Bragg grating has and multiple welds a little, Bragg grating is additionally provided with coat.
The detecting system of a kind of laser instrument based on micro-nano Er-doped fiber, is characterized in that, the micro-nano fiber two ends being stretched to set the er-doped of below numerical value are respectively connected to a Bragg grating, and cut-in method is that heat sealing machine is directly fused.
The detecting system of a kind of laser instrument based on micro-nano Er-doped fiber, is characterized in that, the core diameter of the micro-nano fiber of described er-doped is below 1 μm.
The detecting system of a kind of laser instrument based on micro-nano Er-doped fiber, is characterized in that, the micro-nano fiber of er-doped is naked fibre, the light gate part of two Bragg gratings and be the naked fibre peeling coat off compared with short-tail fibre part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620189967.3U CN205593917U (en) | 2016-03-11 | 2016-03-11 | Detecting system of laser instrument based on receive er -doped fiber a little |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620189967.3U CN205593917U (en) | 2016-03-11 | 2016-03-11 | Detecting system of laser instrument based on receive er -doped fiber a little |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205593917U true CN205593917U (en) | 2016-09-21 |
Family
ID=56928524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620189967.3U Expired - Fee Related CN205593917U (en) | 2016-03-11 | 2016-03-11 | Detecting system of laser instrument based on receive er -doped fiber a little |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205593917U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849345A (en) * | 2019-11-04 | 2020-02-28 | 东南大学 | Miniature resonant optical gyroscope based on multi-turn micro-nano optical fiber three-dimensional resonant cavity |
-
2016
- 2016-03-11 CN CN201620189967.3U patent/CN205593917U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849345A (en) * | 2019-11-04 | 2020-02-28 | 东南大学 | Miniature resonant optical gyroscope based on multi-turn micro-nano optical fiber three-dimensional resonant cavity |
| CN110849345B (en) * | 2019-11-04 | 2022-04-29 | 东南大学 | Miniature resonant optical gyroscope based on multi-turn micro-nano optical fiber three-dimensional resonant cavity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105699327B (en) | A kind of detecting system and method for the laser based on micro-nano Er-doped fiber | |
| CN1900696B (en) | Hollow core photon crystal fiber-optic fiber gas sensor | |
| CN1625680B (en) | Fiber-optic based cavity ring-down spectroscopy apparatus | |
| CN205808610U (en) | A kind of optical fiber FP chamber baroceptor | |
| CN206618528U (en) | A kind of optical fiber air pressure sensing device based on multiple Fabry-Perot micro-cavities | |
| CN110057389B (en) | Optical fiber sensor based on side hole optical fiber double Mach-Zehnder interference vernier effect | |
| CN208091588U (en) | Micro-nano long period fiber-optical grating temperature sensor based on glass capillary encapsulation | |
| CN102262062B (en) | Microstructure fiber Bragg grating gas sensor and detection device | |
| CN110726697A (en) | Mach-Zehnder interferometer optical fiber ammonia gas sensor based on tapered fine core optical fiber | |
| CN103335958B (en) | Multiplexing optical fiber hydrogen sensor rapid to respond in low temperature environment | |
| CN103682963B (en) | A kind of tunable multi-wavelength micro optical fiber laser instrument and preparation method thereof | |
| CN104764418A (en) | Gold-plated tilted fiber Bragg grating based distortion measuring sensor | |
| CN204881905U (en) | Temperature sensor of spherical structure optic fibre | |
| CN204177736U (en) | The trace gas detection device in chamber is swung based on two-way light decay | |
| CN109374027A (en) | A kind of bis- parameter fibre optical sensors of Sagnac based on high birefringence micro-nano fiber | |
| CN106290250A (en) | Optical-fiber type that modified graphene strengthens is poisonous/harmful gas sensor and preparation method thereof | |
| CN105699328B (en) | A kind of detecting system and method based on er-doped micro-nano fiber annular PN junction laser PN | |
| CN205593917U (en) | Detecting system of laser instrument based on receive er -doped fiber a little | |
| Jiang et al. | Combined-Vernier effect based on hybrid fiber interferometers for ultrasensitive temperature and refractive index sensing | |
| Cheng et al. | Simultaneous measurement of ultraviolet irradiance and temperature by employing optical fiber SPR sensor with Ag/ZnO/PDMS coating | |
| CN114137273A (en) | Temperature sensitive current eliminating sensing device of FBG (fiber Bragg Grating) cascade optical fiber composite structure | |
| CN116642837A (en) | Photothermal spectrum gas detection device and method based on micro-nano optical fiber array | |
| CN205656120U (en) | Optical -fiber hydrogen sensor | |
| Yue et al. | A Fabry-Perot Fiber-Optic Interferometer for Highly Sensitive CO 2 Detection Based on the Nanoparticles Self-Assembly Technology | |
| CN110907400A (en) | Gas detection device based on micro-channel polarization-maintaining optical fiber Sagnac interference structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160921 Termination date: 20200311 |