CN1945661A - Fiber optical test instrument - Google Patents
Fiber optical test instrument Download PDFInfo
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- CN1945661A CN1945661A CN 200610016408 CN200610016408A CN1945661A CN 1945661 A CN1945661 A CN 1945661A CN 200610016408 CN200610016408 CN 200610016408 CN 200610016408 A CN200610016408 A CN 200610016408A CN 1945661 A CN1945661 A CN 1945661A
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Abstract
A fiber-optic apparatus includes a mainframe, an optical interference apparatus and an optical apparatus, which connect with each other by the optical fiber transmitting line. Something is installed in the mainframe such as the laser device linking with power, 1 * 2 coupler, broadband light source device and optical amplifier, and the broadband light source output is used for the experiment. The signals output from FBG sensor are input into the optical amplifier through 1*2 and 2*2 coupler, and the broadband light source and narrowband signals are amplified by the optical amplifier to form amplified output, thereby creating amplifier experiment. The mainframe is also equipped with the adjustable FBG, by which, the light constitutes gain output through the 2*2 coupler, a photodiode and power amplifier.
Description
Technical field
The present invention relates to a kind of optical-fibre communications and optical fiber sensing technology.Particularly relate to a kind of fundamental characteristics that can grasp optical fiber and fiber grating by experiment, the basic structure of optical fiber and fiber-optic grating sensor, the ultimate principle of optical fiber and fiber-optic grating sensor, the basic skills that optical fiber and optical fiber grating sensing are measured and the fiber optical test instrument of principle.
Background technology
Fibreoptics is one of most important scientific-technical progress of 20th century, particularly modern optical-fibre communications, optical fiber and optical fiber grating sensing.Optical-fibre communications, optical fiber and fiber-optic grating sensor are the new techniques of high speed development in recent years, and the characteristics of optical fiber communication are that information capacity is big, and transmission range is long, and anti-electromagnetic interference capability is strong.Optical fiber and fiber-optic grating sensor can collect the sensing of information and be transmitted in one, compare it with traditional sensor and have a lot of advantages: as explosion-proof, and anti-electromagnetic interference (EMI), anticorrosive, anti-vibration, high temperature resistant, volume is little, in light weight, flexible, can under rugged surroundings, use especially.Distributed fiberoptic sensor is except above advantage, and it can measure the signal of any point at sensor fibre place.The existing market widespread use optical time domain reflectometer (OTDR), optical frequency territory reflectometer (OFDR) and various interferometer, for example M-Z interferometer etc. arranged.Distributed fiberoptic sensor belongs to intensity detection, and their common problems that exists are to be subject to light source fluctuating, fibre-optical bending, device aging etc. to influence their measuring accuracy and reliability.And each experiment relates to an instrument, uses also inconvenient.
Summary of the invention
Technical matters to be solved by this invention is that a kind of fiber optical test instrument that can carry out multiple optical fiber and fiber grating experiment is provided.
The technical solution adopted in the present invention is: a kind of fiber optical test instrument, include the fiber optical test instrument main frame, optical interference experiment instrument and Experiments of Optics instrument, the three interconnects by optical fiber transmission line, wherein, be provided with in the fiber optical test instrument main frame: the laser instrument that is connected with power supply, 1 * 2 coupling mechanism of the light source that the reception laser instrument sends, receive the wideband light source device and the image intensifer of the two-way output light of 1 * 2 coupling mechanism respectively, supply the wideband light source of experiment usefulness through the wideband light source of wideband light source device output to the wire jumper connector formation of wideband light source output; Narrow band signal with the output of bifunctional fiber-optic grating sensor inputs to image intensifer by 1 * 2 coupling mechanism and 2 * 2 coupling mechanisms and wire jumper connector, wideband light source and narrow band signal constitute to amplify jointly after image intensifer is exaggerated to be exported through the output of wire jumper connector, thereby forms the amplifier experiment; Also be provided with the adjustable optic fibre grating, when the wavelength of adjustable optic fibre grating equated with the wavelength of fiber-optic grating sensor, its light constituted gain through 2 * 2 coupling mechanisms, photodiode and power amplifier and exports the wire jumper connector to, thereby formed the gain experiment.
Also be provided with in the described fiber optical test instrument main frame: the structure that is used to show the output power of light intensity, include the wire jumper connector that receives the wideband light source signal, reception shows the power display of its power through the power meter of the wideband light source light signal of wire jumper connector input;
In the fiber optical test instrument main frame, when the signal of fiber-optic grating sensor during, constitute the linear filtering experiment along 1 * 2 coupling mechanism, the transmission of 2 * 2 coupling mechanism adjustable optic fibre gratings, its filtering signal is exported through the wire jumper connector;
In the described fiber optical test instrument main frame, change fiber-optic grating sensor into long period fiber grating, and along: the wideband light source signal arrives long period fiber grating through the wire jumper connector by 1 * 2 coupling mechanism, reflex to 1 * 2 coupling mechanism again, by 2 * 2 coupling mechanisms to the adjustable optic fibre grating, through the output of wire jumper connector, finish the experiment of long period fiber grating collection of illustrative plates, and depict the reflectance spectrum and the transmission spectrum of fiber grating by the selection of adjustable optic fibre grating.
In the described fiber optical test instrument main frame, also be provided with the Laser Experiments structure, include with the wideband light source signal and pass through 1 * 2 coupling mechanism, 2 * 2 coupling mechanisms, reflex to 2 * 2 coupling mechanisms again, export the wire jumper connector through 1 * 2 coupling mechanism, 2 * 2 coupling mechanisms to laser again to fiber grating.
The panel of described fiber optical test instrument main frame is provided with: the signal output interface that links to each other with the wire jumper connector of signal output in the main frame; The gain output interface that links to each other with gain output wire jumper connector in the main frame; The amplification output interface that links to each other with amplification output wire jumper connector in the main frame; The filtering output interface that links to each other with filtering output wire jumper connector in the main frame; The signal input interface that links to each other with temperature sensor output interface on the Experiments of Optics instrument panel; The laser output interface that links to each other with main frame inner laser output wire jumper connector; The light intensity input interface that links to each other with the wire jumper connector of receiving optical signals in the main frame; The broadband output interface and the broadband input interface that link to each other with the wire jumper connector of wideband light source in main frame output; The sensing input interface that links to each other with the sensing output interface of optical interference experiment instrument and Experiments of Optics instrument; Display screen; Power meter is selected knob; A kind of in voltage and the power selection knob; Voltage and current is selected a kind of in the knob; The wavelength tuning knob; The tuning knob of power;
Be provided with the optical fiber M-Z interference experiment structure and the optical fiber Michelson interference experiment structure that are used to do the fiber optic interferometric experiment in the described optical interference experiment instrument; The panel of optical interference experiment instrument is provided with: the broadband input interface and the broadband input interface that receive fiber optical test instrument main frame wideband light source light signal; The temperature sensing output interface and the strain sensing output interface of output experimental signal; Switch; Display screen; Strain tuning knob and thermal tuning knob.
Described optical fiber Michelson interference experiment structure, include: the wire jumper connector that links to each other with broadband input interface on the optical interference experiment instrument panel, 2 * 2 coupling mechanisms that link to each other with the wire jumper connector, the optical fiber of the transmission broadband light source that links to each other with 2 * 2 coupling mechanisms, after the wideband light source reflection, again through 2 * 2 coupling mechanisms to the wire jumper connector that links to each other with temperature sensing output interface on the panel;
Described optical fiber M-Z interference experiment structure includes: the wire jumper connector that links to each other with broadband input interface on the optical interference experiment instrument panel, first 2 * 2 coupling mechanism that links to each other with the wire jumper connector, the optical fiber of the transmission broadband light source that links to each other with first 2 * 2 coupling mechanism, second 2 * 2 coupling mechanism that links to each other with the other end of optical fiber, after the reflection of second 2 * 2 coupling mechanism wideband light source, again through second 2 * 2 coupling mechanism, optical fiber, first 2 * 2 coupling mechanism to the wire jumper connector that links to each other with strain sensing output interface on the panel.
Described Experiments of Optics instrument is provided with the grating fibers strain transducer structure that is used to do the experiment of grating fibers strain transducer, and the grating fibers arrangement of temperature sensor that is used as the experiment of grating fibers temperature sensor; The panel of Experiments of Optics instrument is provided with: the strain sensing output interface and the temperature sensing output interface of output experimental signal; Switch; Display screen; Tuning and the thermal tuning of strain.
Described grating fibers strain transducer structure includes: the wire jumper connector that links to each other with broadband input interface on the Experiments of Optics instrument panel; 1 * 2 coupling mechanism; The pedestal of stationary spring; Be attached on the spring leaf fiber grating that receives the broadband optical signal of coming from 1 * 2 coupling mechanism, broadband optical signal reflects back into 1 * 2 coupling mechanism, again through the wire jumper connector of strain transducer output to the strain sensing output interface;
Described grating fibers arrangement of temperature sensor includes: the wire jumper connector that links to each other with broadband input interface on the Experiments of Optics instrument panel; 1 * 2 coupling mechanism; Optical fiber, the pedestal of support optical fiber; And be arranged on the optical fiber and be positioned at the grating of pedestal; Wideband light source arrives the temperature sensing output interface through temperature sensor output wire jumper connector again through optical fiber back reflection to 1 * 2 coupling mechanisms of grating.
Also include the bending decay tower that is used to do crooked decay experiment, crooked decay tower is to be piled up by the tower tray of a plurality of disc-shaped structures to form, and the diameter of its tower tray reduces from down to up gradually.
Fiber optical test instrument of the present invention adopts said structure, can make the student understand and grasp the fundamental characteristics of optical fiber and fiber grating by experiment, the basic structure of optical fiber and fiber-optic grating sensor, the ultimate principle of optical fiber and fiber-optic grating sensor, basic skills and principle that optical fiber and optical fiber grating sensing are measured make the student understand the limitation of optical fiber and optical fiber grating sensing simultaneously.
Description of drawings
Fig. 1 is a fiber optical test instrument main frame inner structure synoptic diagram of the present invention;
Fig. 2 is a power experiment structural representation of the present invention;
Fig. 3 is a Laser Experiments structural representation of the present invention;
Fig. 4 is a fiber optical test instrument host panel structural representation of the present invention;
Fig. 5 is an optical interference experiment instrument panel construction synoptic diagram of the present invention;
Fig. 6 is an optical fiber Michelson interference experiment structural representation of the present invention;
Fig. 7 is an optical fiber M-Z interference experiment structural representation of the present invention;
Fig. 8 is an Experiments of Optics instrument panel construction synoptic diagram of the present invention;
Fig. 9 is a grating fibers strain transducer structural representation of the present invention;
Figure 10 is a grating fibers arrangement of temperature sensor synoptic diagram of the present invention;
Figure 11 is a crooked decay tower structure synoptic diagram of the present invention.
Wherein:
A: fiber optical test instrument host B: optical interference experiment instrument C: Experiments of Optics instrument
5a, 5b, 5c, 5e, 5f, 5g, 5h, 5i, 5m, 5l: wire jumper connector
01: display screen 02: power meter milliwatt/microwatt is selected knob 3: voltage/power selection knob
04: voltage/current is selected knob 05: wavelength tuning knob 06: the tuning knob of power
1: laser instrument 2: wideband light source device 3: image intensifer
4:1 * 2 coupling mechanisms 6: power amplifier 8: adjustable optic fibre grating
9:2 * 2 coupling mechanisms 10: power meter 11: power display
12: photodiode 21: signal output interface 22: the gain output interface
23: amplify output interface 24: filtering output interface 25: signal input interface
26: laser output interface 27: light intensity input interface 28: the broadband output interface
29: broadband input interface 30: sensing input interface 31: the broadband input interface
32: temperature sensing output interface 33: broadband input interface 34: the strain sensing output interface
35: switch 36: display screen 37: the strain tuning knob
38: thermal tuning knob 39: strain sensing output interface 40: the strain sensing output interface
41: temperature sensor output interface 42: switch 43: display screen
45: strain tuning 46: tower tray 50: optical fiber
52: pedestal 53: grating 54: optical fiber
55: fiber grating 56: stationary spring 57: pedestal 58: fiber grating
Embodiment
Make a detailed description of the present invention below in conjunction with embodiment.
Fiber optical test instrument of the present invention includes fiber optical test instrument host A, optical interference experiment instrument B and Experiments of Optics instrument C, and the three interconnects by optical fiber transmission line.
As shown in Figure 1, be provided with in the fiber optical test instrument host A: the 980nm laser instrument 1 that is connected with power supply, 1 * 2 coupling mechanism 4 of the light source that reception laser instrument 1 sends, receive the wideband light source device 2 and the image intensifer 3 of the two-way output light of 1 * 2 coupling mechanism 4 respectively, supply the wideband light source of experiment usefulness to the wire jumper connector 5a formation of wideband light source output through the wideband light source of wideband light source device 2 outputs, be that the 980nm laser instrument is divided into two-way through coupling mechanism, lead up to and become wideband light source behind the various devices, the light of wideband light source from the back to exporting by wire jumper connector 5a, for temperature sensor, strain transducer, interferometer, bendingof light loss experiment, power meter, experiment such as linear filtering is used as light source.Another road is to image intensifer and laser instrument experiment.
Wherein 2 employings of wideband light source device are disclosed technology in 2005201235710 in the patent No.; Narrow band signal with 7 outputs of bifunctional fiber-optic grating sensor inputs to image intensifer 3 by 1 * 2 coupling mechanism 4 and 2 * 2 coupling mechanisms 9 and wire jumper connector 5g, wideband light source and narrow band signal constitute to amplify jointly after image intensifer 3 is exaggerated exports the output through wire jumper connector 5b, thereby forms the amplifier experiment; Also be provided with adjustable optic fibre grating 8, when the wavelength of adjustable optic fibre grating 8 equates with the wavelength of fiber-optic grating sensor 7, its light constitutes gain through 2 * 2 coupling mechanisms 9, photodiode 12 and power amplifier 6 and exports wire jumper connector 5e to, thereby forms the gain experiment.
As shown in Figure 2, also be provided with in the described fiber optical test instrument host A: the structure that is used to show the output power of light intensity, include the wire jumper connector 5f of receiving optical signals, receive power meter 10, show the power display 11 of its power through the broadband optical signal of wire jumper connector 5a input.
In the fiber optical test instrument host A, when the signal of fiber-optic grating sensor 7 during, constitute the linear filtering experiment along 8 transmission of 1 * 2 coupling mechanism, 4,2 * 2 coupling mechanisms, 9 adjustable optic fibre gratings, its filtering signal is exported through wire jumper connector 5h.
In the fiber optical test instrument host A, change fiber-optic grating sensor 7 into long period fiber grating, and along: the wideband light source signal arrives long period fiber grating through wire jumper connector 5d by 1 * 2 coupling mechanism 4, reflex to 1 * 2 coupling mechanism 4 again, arrive adjustable optic fibre grating 8 by 2 * 2 coupling mechanisms 9, through wire jumper connector 5h output, finish the experiment of long period fiber grating collection of illustrative plates, and depict the reflectance spectrum and the transmission spectrum of fiber grating by the selection of adjustable optic fibre grating 8.
As shown in Figure 3, in the fiber optical test instrument host A, also be provided with the Laser Experiments structure, include with the wideband light source signal and arrive fiber grating 58 by 1 * 2 coupling mechanism, 4,2 * 2 coupling mechanisms 9, reflex to 2 * 2 coupling mechanisms 9 again, export wire jumper connector 5i through 1 * 2 coupling mechanism, 4,2 * 2 coupling mechanisms 9 to laser again.
As shown in Figure 4, the panel of described fiber optical test instrument host A is provided with: the signal output interface 21 that links to each other with the wire jumper connector 5c of signal output in the main frame; The gain output interface 22 that links to each other with gain output wire jumper connector 5e in the main frame; The amplification output interface 23 that links to each other with amplification output wire jumper connector 5b in the main frame; The filtering output interface 24 that links to each other with filtering output wire jumper connector 5h in the main frame; The signal input interface 25 that links to each other with temperature sensor output interface 41 on the Experiments of Optics instrument C panel; The laser output interface 26 that links to each other with main frame inner laser output wire jumper connector 5i; The light intensity input interface 27 that links to each other with the wire jumper connector 5f of receiving optical signals in the main frame; The broadband output interface 28 and the broadband input interface 29 that link to each other with the wire jumper connector 5a of wideband light source in main frame output; The sensing input interface 30 that links to each other with the sensing output interface of optical interference experiment instrument B and Experiments of Optics instrument C; Display screen 01; Power meter milliwatt/microwatt is selected knob 02; Voltage/power selection knob 03; Voltage/current is selected knob 04; Wavelength tuning knob 05; The tuning knob 06 of power.
As shown in Figure 5, be provided with optical fiber M-Z interference experiment structure and the optical fiber Michelson interference experiment structure that is used to do the fiber optic interferometric experiment in the described optical interference experiment instrument B; The panel of optical interference experiment instrument B is provided with: the broadband input interface 31 and the broadband input interface 33 that receive fiber optical test instrument host A wideband light source signal; The temperature sensing output interface 32 and the strain sensing output interface 34 of output experimental signal; Switch 35; Display screen 36; Strain tuning knob 37 and thermal tuning knob 38.
As shown in Figure 7, described optical fiber M-Z interference experiment structure includes: the wire jumper connector 5a that links to each other with broadband input interface 33 on the optical interference experiment instrument B panel, first 2 * 2 coupling mechanism 9 that links to each other with wire jumper connector 5a, the optical fiber 50 of the transmission broadband light source that links to each other with first 2 * 2 coupling mechanism 9, second 2 * 2 coupling mechanism 9 that links to each other with the other end of optical fiber 50, after the reflection of second 2 * 2 coupling mechanism 9 wideband light source, again through second 2 * 2 coupling mechanism 9, optical fiber 50, first 2 * 2 coupling mechanism 9 is to the wire jumper connector 5h that links to each other with strain sensing output interface 34 on the panel.
The fiber optic interferometric arm has Δ l length difference, can extrapolate non-equilibrium M-Z interferometer interference light intensity by interference of light theory and satisfy following relation:
I＝I
0(1+COS(2πnΔl/λ))，
Wavelength difference Δ λ between the intensity maxima satisfies formula:
When the M-Z interferometer was subjected to ectocine, optical path difference n Δ l can change, and the curve of light distribution (cosine) maximum position produces displacement δ λ.
When influenced by homogeneous temperature field and stress field as interferometer, the displacement δ λ of peak wavelength is:
Wherein l is the length that arm is stressed.
As shown in Figure 6, described optical fiber Michelson interference experiment structure, include: the wire jumper connector 5a that links to each other with broadband input interface 31 on the optical interference experiment instrument B panel, 2 * 2 coupling mechanisms 9 that link to each other with wire jumper connector 5a, the optical fiber 50 of the transmission broadband light source that links to each other with 2 * 2 coupling mechanisms 9, after the wideband light source reflection, again through 2 * 2 coupling mechanisms 9 to the wire jumper connector 5l that links to each other with temperature sensing output interface 32 on the panel.
Optical fiber Michelson interferometer and optical fiber M-Z interferometer belong to two-beam interference, and the relation of light intensity and wavelength satisfies formula: I=I
0(1+COS (4 π n Δ l/ λ))
Wavelength difference Δ λ between the intensity maxima satisfies formula:
The interference spectum waveform is identical with the M-Z interferometer.
As shown in Figure 8, described Experiments of Optics instrument C is provided with the grating fibers strain transducer structure that is used to do the experiment of grating fibers strain transducer, and the grating fibers arrangement of temperature sensor that is used as the experiment of grating fibers temperature sensor; The panel of Experiments of Optics instrument C is provided with: the strain sensing output interface 39,40 and the temperature sensing output interface 41 of output experimental signal; Switch 42; Display screen 43; Strain tuning 45 and display screen 43.
As shown in Figure 9, described grating fibers strain transducer is a kind of semi-girder strain tuning structure, includes: the wire jumper connector 5a that links to each other with broadband input interface 39 on the Experiments of Optics instrument C panel; 1 * 2 coupling mechanism 4; The pedestal 57 of stationary spring 56; Be attached on the spring leaf 56 fiber grating 55 that receives the broadband optical signal of coming from 1 * 2 coupling mechanism 4, broadband optical signal reflects back into 1 * 2 coupling mechanism 4, again through the wire jumper connector 5m of strain transducer output to strain sensing output interface 40.The Material Used mechanics principle can strict calculate the strain of fiber grating, is used for the strain that the simulated environment physical quantity produces fiber grating, can be calculated the wavelength variations of sensing grating again by the strain of fiber grating.
As shown in figure 10, described grating fibers arrangement of temperature sensor includes: the wire jumper connector 5a that links to each other with broadband input interface 39 on the Experiments of Optics instrument C panel; 1 * 2 coupling mechanism 4; Optical fiber 54, the pedestal 52 of support optical fiber 54; And be arranged on the optical fiber 54 and be positioned at the grating 53 of pedestal 52; Wideband light source arrives temperature sensing output interface 41 through temperature sensor output wire jumper connector 5m again through optical fiber 54 back reflections to 1 * 2 coupling mechanisms 4 of grating 53.
In order to improve optical fiber grating temperature sensitivity, fiber grating is encapsulated on the temperature sensitizing susceptor material.Wavelength variable quantity and temperature control are respectively:
Δλ/ΔT＝((α+ξ)+(1-Pe)(αj-α))λ
Δλ/ΔT＝αt
α j: heat susceptor expansion coefficient
α t is defined as the temperature control of this temperature sensor, can be obtained by experiment, and its unit is nm/ ℃.Can calculate variation of temperature by the wavelength change amount that measures:
Temperature is by equation
Obtain.
As shown in figure 11, this experimental provision also includes the bending decay tower that is used to do crooked decay experiment, and crooked decay tower is that the accumulation by a plurality of disc-shaped structures forms, and the diameter of its tower tray reduces from down to up gradually.During experiment optical fiber is wrapped in respectively on the different tower tray of diameter 46,, can draws the attenuation of the wideband light source of the optical fiber on the tower tray that is wrapped in different-diameter from the light intensity of the input end of optical fiber and the light intensity of output terminal.
Tower tray 46 diameters of crooked decay tower of the present invention have respectively: 37.0,32.0,27.0,22.0,17.0,12.0,7.0 7 grade points, in a week during φ 3 wire jumpers can detour respectively, the fiber bending radius that obtains is respectively 20.0,17.5,15.0,12.5,10.0,7.5,6.0.
Employed in the present embodiment image intensifer and power meter can be gone with product sold on the market, also can select the product of Tianjin AT Photonics Inc.'s production and selling for use.It is 200610016075.4 fiber-optic grating sensor that fiber-optic grating sensor is selected application number for use.
Claims (10)
1. fiber optical test instrument, it is characterized in that, include fiber optical test instrument main frame (A), optical interference experiment instrument (B) and Experiments of Optics instrument (C), the three interconnects by optical fiber transmission line (13), wherein, be provided with in the fiber optical test instrument main frame (A): the laser instrument that is connected with power supply (1), 1 * 2 coupling mechanism (4) of the light source that reception laser instrument (1) sends, receive the wideband light source device (2) and the image intensifer (3) of the two-way output light of 1 * 2 coupling mechanism (4) respectively, supply the wideband light source of experiment usefulness through the wideband light source of wideband light source device (2) output to wire jumper connector (5a) formation of wideband light source output; Narrow band signal with bifunctional fiber-optic grating sensor (7) output inputs to image intensifer (3) by 1 * 2 coupling mechanism (4) and 2 * 2 coupling mechanisms (9) and wire jumper connector (5g), wideband light source and narrow band signal constitute to amplify jointly after image intensifer (3) is exaggerated to be exported through wire jumper connector (5b) output, thereby forms the amplifier experiment; Also be provided with adjustable optic fibre grating (8), when the wavelength of adjustable optic fibre grating (8) equates with the wavelength of fiber-optic grating sensor (7), its light constitutes gain through 2 * 2 coupling mechanisms (9), photodiode (12) and power amplifier (6) and exports wire jumper connector (5e) to, thereby forms the gain experiment.
2. fiber optical test instrument according to claim 1, it is characterized in that, also be provided with in the described fiber optical test instrument main frame (A): the structure that is used to show the output power of light intensity, include the wire jumper connector (5f) that receives the wideband light source signal, reception shows the power display (11) of its power through the power meter (10) of the wideband light source light signal of wire jumper connector (5a) input;
In fiber optical test instrument main frame (A), when the signal of fiber-optic grating sensor (7) during, constitute the linear filtering experiment along 1 * 2 coupling mechanism (4), 2 * 2 coupling mechanisms (9) adjustable optic fibre gratings (8) transmission, its filtering signal is exported through wire jumper connector (5h).
3. fiber optical test instrument according to claim 1, it is characterized in that, in the described fiber optical test instrument main frame (A), change fiber-optic grating sensor (7) into long period fiber grating, and along: the wideband light source signal arrives long period fiber grating through wire jumper connector (5d) by 1 * 2 coupling mechanism (4), reflex to 1 * 2 coupling mechanism (4) again, arrive adjustable optic fibre grating (8) by 2 * 2 coupling mechanisms (9), export through wire jumper connector (5h), finish the experiment of long period fiber grating collection of illustrative plates, and depict the reflectance spectrum and the transmission spectrum of fiber grating by the selection of adjustable optic fibre grating (8).
4. fiber optical test instrument according to claim 1, it is characterized in that, in the described fiber optical test instrument main frame (A), also be provided with the Laser Experiments structure, include with the wideband light source signal and arrive fiber grating (58) by 1 * 2 coupling mechanism (4), 2 * 2 coupling mechanisms (9), reflex to 2 * 2 coupling mechanisms (9) again, export wire jumper connector (5i) through 1 * 2 coupling mechanism (4), 2 * 2 coupling mechanisms (9) to laser again.
5. fiber optical test instrument according to claim 1 is characterized in that, the panel of described fiber optical test instrument main frame (A) is provided with: the signal output interface (21) that links to each other with the wire jumper connector (5c) of signal output in the main frame; The gain output interface (22) that links to each other with gain output wire jumper connector (5e) in the main frame; The amplification output interface (23) that links to each other with amplification output wire jumper connector (5b) in the main frame; The filtering output interface (24) that links to each other with filtering output wire jumper connector (5h) in the main frame; The signal input interface (25) that links to each other with temperature sensor output interface (41) on Experiments of Optics instrument (C) panel; The laser output interface (26) that links to each other with main frame inner laser output wire jumper connector (5i); The light intensity input interface (27) that links to each other with the wire jumper connector (5f) of receiving optical signals in the main frame; The broadband output interface (28) and the broadband input interface (29) that link to each other with the wire jumper connector (5a) of wideband light source in main frame output; The sensing input interface (30) that links to each other with the sensing output interface of optical interference experiment instrument (B) and Experiments of Optics instrument (C); Display screen (01); Power meter is selected knob (02); A kind of (03) in voltage and the power selection knob; Voltage and current is selected a kind of (04) in the knob; Wavelength tuning knob (05); The tuning knob of power (06).
6. fiber optical test instrument according to claim 1 is characterized in that, is provided with the optical fiber M-Z interference experiment structure and the optical fiber Michelson interference experiment structure that are used to do the fiber optic interferometric experiment in the described optical interference experiment instrument (B); The panel of optical interference experiment instrument (B) is provided with: the broadband input interface (31) and the broadband input interface (33) that receive fiber optical test instrument main frame (A) wideband light source light signal; The temperature sensing output interface (32) and the strain sensing output interface (34) of output experimental signal; Switch (35); Display screen (36); Strain tuning knob (37) and thermal tuning knob (38).
7. fiber optical test instrument according to claim 6, it is characterized in that, described optical fiber Michelson interference experiment structure, include: the wire jumper connector (5a) that links to each other with broadband input interface (31) on optical interference experiment instrument (B) panel, 2 * 2 coupling mechanisms (9) that link to each other with wire jumper connector (5a), the optical fiber (50) of the transmission broadband light source that links to each other with 2 * 2 coupling mechanisms (9), after the wideband light source reflection, again through 2 * 2 coupling mechanisms (9) to the wire jumper connector (51) that links to each other with temperature sensing output interface (32) on the panel;
Described optical fiber M-Z interference experiment structure includes: the wire jumper connector (5a) that links to each other with broadband input interface (33) on optical interference experiment instrument (B) panel, first 2 * 2 coupling mechanism (9) that links to each other with wire jumper connector (5a), the optical fiber (50) of the transmission broadband light source that links to each other with first 2 * 2 coupling mechanism (9), second 2 * 2 coupling mechanism (9) that links to each other with the other end of optical fiber (50), after the reflection of second 2 * 2 coupling mechanism (9) wideband light source, again through second 2 * 2 coupling mechanism (9), optical fiber (50), first 2 * 2 coupling mechanism (9) is to the wire jumper connector (5h) that links to each other with strain sensing output interface (34) on the panel.
8. fiber optical test instrument according to claim 1, it is characterized in that, described Experiments of Optics instrument (C) is provided with the grating fibers strain transducer structure that is used to do the experiment of grating fibers strain transducer, and the grating fibers arrangement of temperature sensor that is used as the experiment of grating fibers temperature sensor; The panel of Experiments of Optics instrument (C) is provided with: the strain sensing output interface (39,40) and the temperature sensing output interface (41) of output experimental signal; Switch (42); Display screen (43); Strain tuning (45) and thermal tuning (44).
9. fiber optical test instrument according to claim 8 is characterized in that, described grating fibers strain transducer structure includes: the wire jumper connector (5a) that links to each other with broadband input interface (39) on Experiments of Optics instrument (C) panel; 1 * 2 coupling mechanism (4); The pedestal (57) of stationary spring (56); Be attached to spring leaf (56) and go up receive the fiber grating (55) of the broadband optical signal of coming from 1 * 2 coupling mechanism (4), broadband optical signal reflects back into 1 * 2 coupling mechanism (4), and the wire jumper connector (5m) through strain transducer output arrives strain sensing output interface (40) again;
Described grating fibers arrangement of temperature sensor includes: the wire jumper connector (5a) that links to each other with broadband input interface (39) on Experiments of Optics instrument (C) panel; 1 * 2 coupling mechanism (4); Optical fiber (54), the pedestal (52) of support optical fiber (54); And be arranged on the grating (53) that pedestal (52) were gone up and be positioned to optical fiber (54); Wideband light source arrives temperature sensing output interface (41) through temperature sensor output wire jumper connector (5m) again through optical fiber (54) back reflection to 1 * 2 coupling mechanisms (4) of grating (53).
10. fiber optical test instrument according to claim 1, it is characterized in that, also include the bending decay tower that is used to do crooked decay experiment, crooked decay tower is to be piled up by the tower tray (46) of a plurality of disc-shaped structures to form, and the diameter of its tower tray reduces from down to up gradually.
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| CN103456218A (en) * | 2013-09-22 | 2013-12-18 | 天津港东科技发展股份有限公司 | Optical fiber interference demonstration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456218A (en) * | 2013-09-22 | 2013-12-18 | 天津港东科技发展股份有限公司 | Optical fiber interference demonstration device |
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