CN201707464U - Double-wavelength single-mode optical fiber attenuator - Google Patents
Double-wavelength single-mode optical fiber attenuator Download PDFInfo
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- CN201707464U CN201707464U CN2010201678419U CN201020167841U CN201707464U CN 201707464 U CN201707464 U CN 201707464U CN 2010201678419 U CN2010201678419 U CN 2010201678419U CN 201020167841 U CN201020167841 U CN 201020167841U CN 201707464 U CN201707464 U CN 201707464U
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- light source
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Abstract
A double-wavelength single-mode optical fiber attenuator is characterized in that a computer circuit board is mounted on one side in a casing close to a panel, an optical fiber deformation mechanism is mounted in the middle of the casing, a 1310nm single-mode light source, a 1550 single-mode light source and a light amplifier are mounted on the upper portion of the casing, and an inverter unit is mounted on the left of the lower portion of the casing while a battery unit is mounted on the right of the lower portion of the casing. The double-wavelength single-mode optical fiber attenuator adopts a miniature motor as power, leads optical fibers to be in bending deformation through a stress transmission mechanism so as to generate loss of transmission light, and utilizes two-core single-mode strap-shaped optical fibers as media, wherein one optical fiber is used for measuring light attenuation while the other parallel optical fiber provides a channel with attenuation capacity for the external. In addition, the attenuator adopts a single chip microcomputer to realize automatic test, and is convenient and accurate.
Description
Technical field
The utility model is a kind of dual wavelength single-mode fiber decay instrument that utilizes one-chip computer to monitor, and is equivalent to be serially connected in the Variable Optical Attenuator unit in the optical fiber transmission line, belongs to the Computer Applied Technology field.
Background technology
At present, in the Performance Detection of fiber optical digital transmission system, at the receiving end of transmission terminal or the interface of output terminal, usually connect a Variable Optical Attenuator (substituting line simulator) to realize the interim effect that strengthens or reduce loss between the optical line transceiver, can try to achieve the maximum sensitivity and the dynamic range (promptly not causing the high receiving optical signals intensity of error rate of system increase and the difference of minimum receiving optical signals intensity) of the received signal of optical transmission device.Variable Optical Attenuator commonly used all is to adopt to insert the medium glass sheet that damping capacity does not wait between the section of optical fiber, because the end face of optical fiber and the reflex on medium glass plane, cause this class aid to produce stronger luminous reflectanc, especially when the measurement of the transmission system (being higher than 140Mb/s) of two-forty or image delivering system, stronger reflected light signal produces irregular interference to the light source performance, the basic parameter that causes the output light signal is (as wavelength, phase place, pulsewidth etc.) drift about, seriously influence the stability test of digital transmission system, disturbed the stability and the precision of test result of photoreceiver performance.
Summary of the invention
The purpose of this utility model is the high-precision dual wavelength single-mode fiber decay of having of a kind of electromechanical integration of an exploitation instrument.Be used as power with micromotor, through variator and stress conduction mechanism, make optical fiber produce flexural deformation, optical fiber produces the loss of transmission light because of bending.Lossy medium is the single mode ribbon fiber of a disloyalty, an optical fiber wherein is used for the measurement of light decrement, parallel optical fiber under another same state is used for providing to the measured system in outside the transmission channel of same damping capacity, proofread, check, set with one-chip computer, finish the overall process of assigned operation automatically.
The utility model purpose is to realize like this, LCDs is equipped with on top at decay instrument case panel, the bottom is equipped with power switch, wavelength Conversion key, setting key, transposition key, is transferred number key and startup/stop key, top that optical connector input socket and optical connector output socket also are housed.In this custom-designed housing, the one-chip computer circuit board is housed near panel one side, the optical fiber attenuation deformation mechanism is installed at the middle part of housing, 1310nm single mode light source and 1550nm single mode light source are equipped with in top, image intensifer is equipped with in left side at 1310nm single mode light source, inverter unit is installed on the left side, bottom, and battery unit is installed on the right.Fibre strain mechanism is made of frame, displacement screw rod, moving press plate, slide bar, micromotor, speed gear group, code-disc, optical combiner, rotation direction sensor and two core single mode ribbon fibers.Install a displacement screw rod at central rack, the screw rod right-hand member passes to be installed one and forms the speed gear group by vertical conical gear and horizontal conical gear on the termination of framework, horizontal conical gear is connected with turning axle with the micromotor of its below, on the part in displacement screw rod framework code-disc and moving press plate are housed successively, two rotation direction sensors are equipped with at place, code-disc following peripheral.At upper rack a slide bar is installed, the moving press plate upper end is installed on the slide bar, the lower end and the screw rod spiral shell dress mutually that is shifted, the inboard two ends of frame upper ledge are equipped with left limit sensor and right limit sensor respectively, the middle part dish is equipped with two core single mode ribbon fibers in the frame, wherein one is decay monitoring optical fiber, and its end is connected with the 1550nm light source cell with the 1310nm light source cell respectively by an optical combiner, and the other end is connected with image intensifer; Another is an attenuating fiber, the connection of this attenuating fiber, be with its two ends respectively with casing on optical connector input socket be connected with the optical connector output socket.
The decay of light signal is realized by the optical fiber attenuation deformation mechanism, on the displacement screw rod of deformation mechanism, the circular code-disc of a peripheral band rectangular aperture is housed, two rotation direction sensors are equipped with at the place, following peripheral of code-disc, jointly the rotation forward or backwards and the anglec of rotation of motor are monitored, realize quantitatively moving of moving slide board left and right directions with this, single unit system carries out the measurement of light decrement automatically by microcontroller system, finishes the set positions and the various function operations of complete machine of associated components in the deformation mechanism.
The utlity model has following characteristics: (1) adopts computing machine that optical digital transmission system is tested automatically, and is promptly convenient accurate again.(2) physical interface of optical device meets national standard, is applicable to the test of optical transport network at different levels system; (3) adopt the light source of two wavelength to carry out the independently control of light decay depreciation, convenient, simple and direct, easy control.
Description of drawings
Fig. 1 is the utility model case panel synoptic diagram.
Fig. 2 is an inner structure synoptic diagram of the present utility model.
Fig. 3 is that the A-A of Fig. 2 is to cut-open view.
Fig. 4 looks synoptic diagram for the master of fibre strain mechanism.
Fig. 5 is the right view of Fig. 4.
Fig. 6 (a) is that the B of code-disc is to floor map.
Fig. 6 (b) is the D portion enlarged drawing of Fig. 6 (a).
Fig. 7 is two core ribbon fiber unit connection diagrams.
Fig. 8 is the image intensifer circuit theory diagrams.
Fig. 9 is an one-chip computer control circuit schematic diagram.
Among Fig. 1,2,3: 1, housing; 1-1, LCDs; 1-3, optical connector input socket; 1-4, optical connector output socket; 2, one-chip computer circuit board; 2-1, conductive rubber strip; 3, fibre strain mechanism; 4,1310nm single mode light source; 5,1550nm single mode light source; 6, image intensifer; 7, inverter unit; 8, battery unit; K
1, power switch; K
2, the wavelength Conversion key; K
3, setting key; K
4, the transposition key; K
5, transfer the number key; K
6, starting/stop key.
Among Fig. 4,5,6 (a), 6 (b), 7: 3-1, frame; 3-2, two core single mode ribbon fibers; 3-2-1, decay monitoring optical fiber; 3-2-1A, 1310nm light source connector; 3-2-1B, 1550nm light source connector; 3-2-1C, image intensifer connector; 3-2-2, attenuating fiber; 3-2-2A, attenuating fiber insert connector; 3-2-2C, attenuating fiber out connector; 3-3, optical combiner; 3-4, displacement screw rod; 3-5, slide bar; 3-6L, left limit sensor; 3-6R, right limit sensor; 3-7, speed gear group; 3-8, micromotor; 3-9, code-disc; 3-10, rotation direction sensor; 3-11, moving press plate.
Among Fig. 8: PIN, photodiode.
Among Fig. 9: 9-1, one-chip computer chip; 9-2, mould/number conversion chip; 9-3, latch; 9-4, wavelength show the switching driver element; 9-5, wavelength display unit; 9-6, motor commutation driver element.
Embodiment
As shown in Figure 1, on housing (1) panel top LCDs (1-1) is housed, power switch (K is equipped with in the bottom
1), wavelength Conversion key (K
2), setting key (K
3), transposition key (K
4), transfer number key (K
5), startup/stop key (K
6), optical connector input socket (1-3) and optical connector output socket (1-4) also are equipped with in the top.
Shown in Fig. 2,3, in housing (1), computer circuit board (2) is installed near panel one side, conductive rubber strip (2-1) is equipped with on the right side of circuit board (2), and LCDs (1-1) is connected with computer circuit board (2) by conductive rubber strip (2-1).Fibre strain mechanism (3) is installed at the middle part in the housing (1), 1310nm single mode power supply (4) and 1550nm single mode light source (5) are installed in top, in the left side of 1310nm single mode light source (4) image intensifer (6) is housed, inverter unit (7) is installed on the left side, bottom, and battery unit (8) is installed on the right.
As Fig. 4,5,6 (a), 6 (b) and shown in Figure 7, fibre strain mechanism (3) is by frame (3-1), two core single mode ribbon fibers (3-2), decay monitoring optical fiber (3-2-1), 1310nm light source connector (3-2-1A), 1550nm light source connector (3-2-1B), image intensifer connector (3-2-1C), attenuating fiber (3-2-2), attenuating fiber inserts connector (3-2-2A), attenuating fiber out connector (3-2-2C), optical combiner (3-3), displacement screw rod (3-4), slide bar (3-5), left limit sensor (3-6L), right limit sensor (3-6R), speed gear group (3-7), micromotor (3-8), code-disc (3-9), rotation direction sensor (3-10) and moving press plate (3-11) are formed.Frame (3-1) middle part of fibre strain mechanism (3) installs a displacement screw rod (3-4), displacement screw rod (3-4) right-hand member passes on the termination of framework (1-1) a speed gear group (3-7) of being made up of vertical conical gear and horizontal conical gear is housed, horizontal conical gear with its below the micromotor (3-8) that is equipped be connected with turning axle.Be coated with code-disc (3-9) and moving press plate (3-11) successively on the part in displacement screw rod (3-4) framework, two rotation direction sensors (3-10) are equipped with at the place, following peripheral of code-disc (3-9), a slide bar (3-5) is installed on frame (3-1) top of fibre strain mechanism (3), moving press plate (3-11) upper end is installed on the slide bar (3-5), its lower end and screw rod (3-4) the spiral shell dress mutually that is shifted, the inboard both sides of frame (3-1) upper ledge are separately installed with left limit sensor (3-6L) and right limit sensor (3-6R), and the interior middle part of frame (3-1) dish is equipped with two core single mode ribbon fibers (3-2); Wherein one is decay monitoring optical fiber (3-2-1), its end is divided into two optical connectors (3-2-1A) and (3-2-1B) by optical combiner (3-3), connector (3-2-1A) is connected with 1310nm light source cell (4), and connector (3-2-1B) is connected with 1550nm light source cell (5).The connector of the other end (3-2-1C) is connected with image intensifer (6).Another optical fiber of two core single mode ribbon fibers is attenuating fiber (3-2-2), the input connector (3-2-2A) of this attenuating fiber one end is connected with the optical connector input socket (1-3) on housing (1) top is inboard, and the attenuating fiber out connector (3-2-2C) of the other end is connected with the inboard of the optical connector output socket (1-4) on housing (1) top.
As shown in Figure 8: the light access port of image intensifer (6) is photodiode (PIN), its upper end by resistance (R-P) and power supply (+5V) be connected, the internal structure of image intensifer (6) is by two-stage calculation amplifier IC
1With operational amplifier IC
2Finish resistance R
17With resistance R
18Be serially connected in+5V power supply and ground between, intermediate point and amplifier IC
1Input end T
1Link to each other, photosignal terminates to amplifier IC by a
1T
2End, resistance R
19Left end and amplifier IC
1T
2End connects, right-hand member and amplifier IC
1Output terminal T
3Be connected.Resistance R
19Size determined amplifier IC
1Enlargement factor.Amplifier IC
1T
3End and amplifier IC
2Input end T
5Join.Resistance R
20With resistance R
21Be serially connected in+5V power supply and ground between, intermediate contact and amplifier IC
2T
6Port is connected, resistance R
22Left end and amplifier IC
2T
5End connects, resistance R
22Right-hand member and amplifier IC
2Output terminal T
7Be connected resistance R
22The size of resistance depends on pair amplifier IC
2The requirement of amplifying power.Amplifier IC
2Output terminal T
7Through resistance R
23Be connected on the output port b of circuit unit.
As shown in Figure 9, one-chip computer circuit board (2) is realized control, measurement and the demonstration of complete machine.Wherein the P2.0 of one chip microcomputer chip (9-1) monitors the wavelength display end after starting shooting, and the P0.0 of one chip microcomputer chip (9-1)～P0.7 port is 8 bit data I/O ports, from the D of A/D converter (9-2)
0～D
7Port reads in the data of measurement, also the data of measuring to liquid crystal display (1-1) output.P2.1 and P2.2 are respectively the driving port of 1310nm single mode light source (4) and 1550 single mode light sources (5).P2.5, P2.6 are the detection signal input port that code-disc (3-9) is gone up rotation direction sensor (3-10).P1.6 and P1.7 port are moving slide board (3-11) peaked spacing detecting sensor of left and right displacement (3-6L) and signal input port (3-6R).
P3.0, P3.1, P3.2, P3.3, P3.4 are five operating key (K
2～K
6) input port, at ordinary times through R
16On draw high level, the realization of the measuring light power function of one-chip computer chip (9-1) is the light signal of being received by photodiode (PIN) after the decay of two core single mode ribbon fibers (3-2), through sending into the 10VIN end of modulus conversion chip (9-2) after image intensifer (6) amplification, send into data I/O port (P0.0～P0.7) of one-chip computer chip (9-1) through D0～D7 port through the data-signal after the conversion, data are after treatment sent into LCDs (1-1) through latch (9-3), the liquid crystal drive power supply of display screen is by the P1.0 of one-chip computer chip (9-1), P1.1, P1.2, P1.3, P1.4 produces, respectively through COM
0, COM
1, COM
2, COM
3Drive LCDs (1-1).
Battery unit (8) in the housing (1) is sent into inverter unit (7) through switch (K1), provides+working power of 5V to complete machine by inverter unit (7).
Claims (2)
1. dual wavelength single-mode fiber decay instrument, by housing, the one-chip computer circuit board, conductive rubber strip, fibre strain mechanism, 1310nm single mode light source, 1550nm single mode light source, image intensifer, LCDs, optical connector input socket, the optical connector output socket, inverter unit, battery unit, power switch, the wavelength Conversion key, setting key, the transposition key, transfer number key and starting/stop key to constitute, it is characterized in that: LCDs is housed on case panel top, power switch is equipped with in the bottom, the wavelength Conversion key, setting key, the transposition key, transfer number key and startup/stop key, optical connector input socket and optical connector output socket are equipped with in the top; In housing, computer circuit board is installed near panel one side, conductive rubber strip is equipped with on the computer circuit board right side, LCDs is connected with computer circuit board by conductive rubber strip, fibre strain mechanism is installed at the middle part, 1310nm single mode light source and 1550nm single mode light source are installed in top, an image intensifer is equipped with in the left side of 1310nm single mode light source, and inverter unit is installed on the left side, bottom, and battery unit is installed on the right.
2. dual wavelength single-mode fiber decay instrument according to claim 1, it is characterized in that: fibre strain mechanism is by frame, moving press plate, the displacement screw rod, litter, micromotor, the speed gear group, code-disc, optical combiner, rotation direction sensor, two core single mode ribbon fibers constitute, the central rack of fibre strain mechanism installs a displacement screw rod, displacement screw rod right-hand member passes on the termination of framework a speed gear group of being made up of vertical conical gear and horizontal conical gear is installed, horizontal conical gear is connected with turning axle with the micromotor that be equipped with its below, be coated with code-disc and moving press plate successively on the part in displacement screw rod frame, two rotation direction sensors are equipped with at the place, following peripheral of code-disc; Upper rack is installed a slide bar, the moving press plate upper end is installed on the slide bar, the lower end and the screw rod spiral shell dress mutually that is shifted, the inboard two ends of frame upper ledge are equipped with left limit sensor and right limit sensor respectively, the middle part dish is equipped with two core single mode ribbon fibers in the frame, wherein one is decay monitoring optical fiber, and its end is connected with the 1550nm light source cell with the 1310nm light source cell respectively by optical combiner, and the other end is connected with image intensifer; Another is an attenuating fiber, the connection of this attenuating fiber, be with its two ends respectively with casing on optical connector input socket be connected with the optical connector output socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201678419U CN201707464U (en) | 2010-04-23 | 2010-04-23 | Double-wavelength single-mode optical fiber attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201678419U CN201707464U (en) | 2010-04-23 | 2010-04-23 | Double-wavelength single-mode optical fiber attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201707464U true CN201707464U (en) | 2011-01-12 |
Family
ID=43444624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201678419U Expired - Fee Related CN201707464U (en) | 2010-04-23 | 2010-04-23 | Double-wavelength single-mode optical fiber attenuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201707464U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105068243A (en) * | 2015-09-01 | 2015-11-18 | 中国人民解放军总参谋部通信训练基地 | Variable optical attenuator |
| CN112236941A (en) * | 2018-06-19 | 2021-01-15 | 弗罗纽斯国际有限公司 | Inverter casing |
| CN117388983A (en) * | 2023-10-18 | 2024-01-12 | 青岛歌尔智能传感器有限公司 | Optical fiber attenuator |
-
2010
- 2010-04-23 CN CN2010201678419U patent/CN201707464U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105068243A (en) * | 2015-09-01 | 2015-11-18 | 中国人民解放军总参谋部通信训练基地 | Variable optical attenuator |
| CN112236941A (en) * | 2018-06-19 | 2021-01-15 | 弗罗纽斯国际有限公司 | Inverter casing |
| CN112236941B (en) * | 2018-06-19 | 2023-07-14 | 弗罗纽斯国际有限公司 | Inverter casing |
| CN117388983A (en) * | 2023-10-18 | 2024-01-12 | 青岛歌尔智能传感器有限公司 | Optical fiber attenuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Sumitomo Electric Co., Ltd. Document name: Notification to Pay the Fees |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110112 Termination date: 20110423 |