CN103744144A - Variable optical attenuator - Google Patents
Variable optical attenuator Download PDFInfo
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- CN103744144A CN103744144A CN201310746104.2A CN201310746104A CN103744144A CN 103744144 A CN103744144 A CN 103744144A CN 201310746104 A CN201310746104 A CN 201310746104A CN 103744144 A CN103744144 A CN 103744144A
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- decay
- pin
- connecting rod
- collimator
- attenuator
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Abstract
The invention provides a variable optical attenuator. The variable optical attenuator comprises an attenuator body, an attenuation needle, an input optical fiber, an output optical fiber, a lead screw, a connecting rod, a linear displacement sensor and a signal processing unit, wherein one end of the attenuator body is provided with a storage hole in an inward-concave manner, two sides of the attenuator body are respectively provided with a first collimator and a second collimator which are coaxial, a first end of the first collimator and a first end of the second collimator are respectively arranged in the storage hole, a second end of the first collimator is connected with the input optical fiber, a second end of the second collimator is connected with the output optical fiber, the attenuation needle is arranged in the storage hole, a second end of the attenuation needle is fixedly connected with a first side of the connecting rod, a signal input slide rod of the linear displacement sensor is fixedly connected with the first side of the connecting rod, a first end of the lead screw is fixedly connected with a second side of the connecting rod, a signal output end of the linear displacement sensor is connected with the signal processing unit, and the signal processing unit is connected with a display unit. The variable optical attenuator is low in cost and large in attenuation range.
Description
Technical field
The present invention relates to a kind of adjustable optical attenuator.
Background technology
Show at present adjustable intelligent adjustable light decay device, a kind ofly utilize electric adjustable attenuator to realize, this kind of mode bandwidth of operation is wide not, do not cover whole communication band (1250～1650nm), the dough softening is also not high enough, and individual devices is not realized decay range more than 60dB, utilizes 2 series connection decay, added losses increase, and cost increases; A kind of utilization decay diaphragm is realized, and this mode diaphragm of decaying is made difficulty, and cost is high, and the monolithic dough softening does not equally reach 60dB yet.
Summary of the invention
The object of the invention is to overcome the defect of prior art, provide that a kind of cost is low, decay range large adjustable optical attenuator.
The present invention is achieved in that a kind of adjustable optical attenuator, comprise attenuator body, decay pin, input optical fibre, output optical fibre, screw mandrel, connecting rod, linear displacement transducer and signal processing unit, described attenuator body one end accommodation hole that sets to the concave, described attenuator body both sides are embedded with respectively coaxial first collimator and the second collimating apparatus, the first end of the first end of described first collimator and the second collimating apparatus is all positioned at described accommodation hole, the second end of described first collimator is connected with described input optical fibre, the second end of described the second collimating apparatus is connected with described output optical fibre, described decay pin is placed in described accommodation hole, the first end of described decay pin is above the light path between described first collimator and the second collimating apparatus, the second end of described decay pin extends to outside described accommodation hole and with described connecting rod the first side and is fixedly connected with, the signal input sliding bar of described linear displacement transducer is fixedly connected with described connecting rod the first side, the first end of described screw mandrel is fixedly connected with the second side of described connecting rod, the first side of described connecting rod is relative with the second side of described connecting rod, the signal output part of described linear displacement transducer is connected with described signal processing unit, described signal processing unit is connected with a display unit.
Further, the second end of described screw mandrel is connected with a rotary handle.
Further, described decay pin, signal input sliding bar and screw mandrel are all connected with described connecting rod is vertical.
Further, described linear displacement transducer is potentiometric displacement transducer.
Further, described decay pin first end is provided with the face of being in the light in the face of a side of described first collimator.
Further, described in, the face of being in the light is light-proof material or light absorbent.
Further, described decay pin first end is edge-shaped, and the blade of described edge-shaped is vertical with described light path.
Further, described decay pin first end is taper.
Further, described decay pin first end is conical.
The invention provides a kind of adjustable optical attenuator, the signal input sliding bar of decay pin and linear displacement transducer is fixed on connecting rod simultaneously, connecting rod is connected with screw mandrel, the other end that turns screw mandrel drives decay pin and signal input sliding bar synchronizing moving by connecting rod, the lower end of decay pin is arranged on the top of the light path between input optical fibre and output optical fibre, decay pin can block gradually described light path in mobile process, reach the object of decay, owing to decaying, pin and described signal input sliding bar are synchronization-moving, so change by observing the input signal of described linear displacement transducer, just can know the displacement of described decay pin, and then the variation that can draw the light decrement between input optical fibre and output optical fibre, mechanical attenuator and linear displacement transducer cost that the present invention uses are all very low, utilize the principle that is in the light simultaneously, by blocking of decay pin, can accomplish 100% light loss, decay range can cover 0～60dB, the directly variation of monitoring optical power, and the variation that only need to monitor the output signal of linear displacement transducer carrys out the variation of display light power, can improve measuring accuracy, simplify processing of circuit.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
A kind of adjustable optical attenuator structural representation that Fig. 1 provides for the embodiment of the present invention;
A kind of adjustable optical attenuator theory diagram that Fig. 2 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As Fig. 1 and Fig. 2, the embodiment of the present invention provides a kind of adjustable optical attenuator, comprise attenuator body 1, decay pin 2, input optical fibre 5, output optical fibre 6, screw mandrel 4, connecting rod 3, linear displacement transducer 9 and signal processing unit 12, described attenuator body 1 one end accommodation hole 11 that sets to the concave, preferably, the other end sealing of described accommodation hole 11, can reduce extraneous interference like this, described attenuator body 1 both sides are embedded with respectively coaxial first collimator 7 and the second collimating apparatus 8, the first end of the first end of described first collimator 7 and the second collimating apparatus 8 is all positioned at described accommodation hole 11, the second end of described first collimator 7 is connected with described input optical fibre 5, the second end of described the second collimating apparatus 8 is connected with described output optical fibre 6, light signal enters into first collimator 7 from described input optical fibre 5, by described first collimator 7, penetrated again, by described the second collimating apparatus 8, receive and be passed in described output optical fibre 6, described input optical fibre 5 is equipped with sealing shroud with described first collimator 7 junctions and described input optical fibre 5 with described the second collimating apparatus 8 junctions, preferably, described first collimator 7 and the second collimating apparatus 8 are and are horizontally disposed with, described decay pin 2 is placed in described accommodation hole 11, the first end of described decay pin 2 is above the light path 10 between described first collimator 7 and the second collimating apparatus 8, the second end of described decay pin 2 extends to outside described accommodation hole 11 and with described connecting rod 3 first sides and is fixedly connected with, preferably, space between described decay pin 2 and described accommodation hole 11 opening parts covers by end cap, further reducing extraneous light disturbs, the signal input sliding bar 91 of described linear displacement transducer 9 is fixedly connected with described connecting rod 3 first sides, the first end of described screw mandrel 4 is fixedly connected with the second side of described connecting rod 3, the first side of described connecting rod 3 is relative with the second side of described connecting rod 3, the signal output part of described linear displacement transducer 9 is connected with described signal processing unit 12, described signal processing unit 12 is connected with a display unit 13, described signal processing unit 12 carries out conversion process by the signal of described sensor transmissions, and send to described display unit 13 and show, particularly, described display unit 13 can be LCD display, described signal processing unit 12 is modulus conversion chip.
A kind of adjustable optical attenuator of the present invention, the signal input sliding bar 91 of decay pin 2 and linear displacement transducer 9 is fixed on connecting rod 3 simultaneously, connecting rod 3 is connected with screw mandrel 4, the other end that turns screw mandrel 4 drives decay pin 2 and signal input sliding bar 91 synchronizing movings by connecting rod 3, the lower end of decay pin 2 is arranged on the top of the light path 10 between input optical fibre 5 and output optical fibre 6, decay pin 2 can block gradually described light path 10 in mobile process, reach the object of decay, because decay pin 2 is synchronization-moving with described signal input sliding bar 91, so change by observing the input signal of described linear displacement transducer 9, just can know the displacement of described decay pin 2, and then the variation that can draw the light decrement between input optical fibre 5 and output optical fibre 6, mechanical attenuator and linear displacement transducer 9 costs that the present invention uses are all very low, utilize the principle that is in the light simultaneously, by blocking of decay pin 2, can accomplish 100% light loss, decay range can cover 0～60dB, the directly variation of monitoring optical power, and the variation that only need to monitor the output signal of linear displacement transducer 9 carrys out the variation of display light power, can improve measuring accuracy, simplify processing of circuit.
In the embodiment of a kind of adjustable optical attenuator of the present invention, the second end of described screw mandrel 4 is connected with a rotary handle 41, by turning rotary handle 41, control screw mandrel 4, can be easily and accurately control the displacement that screw mandrel 4 drives described connecting rod 3, in other embodiments of the invention, the structure that increases friction force also can be set in the side of described rotary handle 41, such as, decorative pattern or striped etc. are set; Further, described decay pin 2, signal input sliding bar 91 and screw mandrel 4 all with described vertical connection of connecting rod 3, convenient installation, the while can accurately guarantee that described decay pin 2 and described signal input the synchronizing moving of sliding bar 91.
Further, described linear displacement transducer 9 is potentiometric displacement transducer, potentiometric displacement transducer converts the mechanical shift of decay pin 2 to it resistance or the Voltage-output of linear or arbitrary function relation by potentiometer element, the variable quantity of resistance has reflected the value of displacement, the increase of resistance still reduces to have shown the direction of displacement, by signal processing unit 12 and display unit 13, this variation is shown, operator can adjust by the signal intensity in the observation unit of display displacement of decay pin 2.That potentiometric displacement transducer has advantages of is simple in structure, output signal is large, easy to use, cheap.
In the embodiment of a kind of adjustable optical attenuator of the present invention, the side that described decay pin 2 first ends are faced described first collimator 7 is provided with the face of being in the light 21, for blocking the light path 10 between first collimator 7 and the second collimating apparatus 8, further, the described face 21 that is in the light is for light-proof material or light absorbent, can guarantee 100% loss of the light at the face that is in the light 21 places like this, be conducive to improve measuring accuracy, in a preferred embodiment of the invention, described decay pin 2 first ends are edge-shaped, the blade of described edge-shaped is vertical with described light path 10, can reduce to greatest extent the area of described decay pin 2 lower surfaces like this, can effectively avoid described decay pin 2 in the process of being in the light, the light loss that light causes due to situations such as the reflection of lower surface and refractions during by described decay pin 2 lower surface, further improve the precision of a kind of adjustable optical attenuator of the present invention.
In other embodiment of a kind of adjustable optical attenuator of the present invention, described decay pin 2 first ends can be also taper, because the light path 10 between first collimator 7 and the second collimating apparatus 8 is cylindric, columned structure is that under upper right, cross-sectional area increases gradually, by decay pin 2 first ends, be set to the taper that xsect increases from the bottom to top gradually, can guarantee to move down while blocking described columned light path 10 gradually when decay pin 2, can guarantee that the part that light path 10 is blocked roughly becomes certain ratio to increase, can guarantee like this precision that described linear displacement transducer 9 is measured, preferably, the first end of described decay pin 2 is conical, like this when described decay pin 2 rotates, as long as at equal height, the area that the pin 2 that can guarantee to decay blocks described light path 10 is the same, and the coning angle of described conical decay pin first end is less, and the precision of decay is just higher.
A kind of smooth adjustable attenuator of the present invention can be made desk-top smooth adjustable attenuator, also can be integrated in a whole case member, makes the intelligent optical adjustable attenuator of hand-held, and integrated convenience is practical.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. an adjustable optical attenuator, it is characterized in that, comprise attenuator body, decay pin, input optical fibre, output optical fibre, screw mandrel, connecting rod, linear displacement transducer and signal processing unit, described attenuator body one end accommodation hole that sets to the concave, described attenuator body both sides are embedded with respectively coaxial first collimator and the second collimating apparatus, the first end of the first end of described first collimator and the second collimating apparatus is all positioned at described accommodation hole, the second end of described first collimator is connected with described input optical fibre, the second end of described the second collimating apparatus is connected with described output optical fibre, described decay pin is placed in described accommodation hole, the first end of described decay pin is above the light path between described first collimator and the second collimating apparatus, the second end of described decay pin is fixedly connected with described connecting rod the first side, the signal input sliding bar of described linear displacement transducer is fixedly connected with described connecting rod the first side, the first end of described screw mandrel is fixedly connected with the second side of described connecting rod, the first side of described connecting rod is relative with the second side of described connecting rod, the signal output part of described linear displacement transducer is connected with described signal processing unit, described signal processing unit is connected with a display unit.
2. adjustable optical attenuator as claimed in claim 1, is characterized in that: the second end of described screw mandrel is connected with a rotary handle.
3. adjustable optical attenuator as claimed in claim 1, is characterized in that: described decay pin, signal input sliding bar and screw mandrel are all connected with described connecting rod is vertical.
4. adjustable optical attenuator as claimed in claim 1, is characterized in that: described linear displacement transducer is potentiometric displacement transducer.
5. adjustable optical attenuator as claimed in claim 1, is characterized in that: the side that described decay pin first end is faced described first collimator is provided with the face of being in the light.
6. adjustable optical attenuator as claimed in claim 5, is characterized in that: described in the face of being in the light be light-proof material or light absorbent.
7. the adjustable optical attenuator as described in claim 1,5 or 6, is characterized in that: described decay pin first end is edge-shaped, and the blade of described edge-shaped is vertical with described light path.
8. the adjustable optical attenuator as described in claim 1,5 or 6, is characterized in that: described decay pin first end is taper.
9. adjustable optical attenuator as claimed in claim 8, is characterized in that: described decay pin first end is for conical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310746104.2A CN103744144B (en) | 2013-12-30 | 2013-12-30 | A kind of adjustable optical attenuator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310746104.2A CN103744144B (en) | 2013-12-30 | 2013-12-30 | A kind of adjustable optical attenuator |
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| Publication Number | Publication Date |
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| CN103744144A true CN103744144A (en) | 2014-04-23 |
| CN103744144B CN103744144B (en) | 2016-04-20 |
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| CN201310746104.2A Active CN103744144B (en) | 2013-12-30 | 2013-12-30 | A kind of adjustable optical attenuator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100785A (en) * | 2016-07-28 | 2016-11-09 | 北京交通大学 | A kind of auto-manual adjustable optical attenuator |
| CN106679701A (en) * | 2017-01-11 | 2017-05-17 | 桂林恒毅金宇通信技术有限公司 | Passive entrance guard sensor |
| CN115453686A (en) * | 2022-09-05 | 2022-12-09 | 广西电网有限责任公司来宾供电局 | LC type optical fiber based on dynamic adjustment of light attenuation and use method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020036934A (en) * | 2000-11-11 | 2002-05-17 | 이충국 | Variable optical attenuator |
| CN2650159Y (en) * | 2003-08-11 | 2004-10-20 | 翔光(上海)光通讯器材有限公司 | Tuneable optical fiber grating division-plugging multiplexer |
| CN1567009A (en) * | 2003-06-12 | 2005-01-19 | 上海邮迅通信发展有限公司 | Absorption optical filter type continuous adjustable digital display optical attenuation device |
| US20090039265A1 (en) * | 2007-08-07 | 2009-02-12 | Alliance Fiber Optic Products, Inc. | Method and apparatus for attenuating a light beam |
| CN203720404U (en) * | 2013-12-30 | 2014-07-16 | 深圳市伽蓝特科技有限公司 | Attenuator capable of regulating light |
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2013
- 2013-12-30 CN CN201310746104.2A patent/CN103744144B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020036934A (en) * | 2000-11-11 | 2002-05-17 | 이충국 | Variable optical attenuator |
| CN1567009A (en) * | 2003-06-12 | 2005-01-19 | 上海邮迅通信发展有限公司 | Absorption optical filter type continuous adjustable digital display optical attenuation device |
| CN2650159Y (en) * | 2003-08-11 | 2004-10-20 | 翔光(上海)光通讯器材有限公司 | Tuneable optical fiber grating division-plugging multiplexer |
| US20090039265A1 (en) * | 2007-08-07 | 2009-02-12 | Alliance Fiber Optic Products, Inc. | Method and apparatus for attenuating a light beam |
| CN203720404U (en) * | 2013-12-30 | 2014-07-16 | 深圳市伽蓝特科技有限公司 | Attenuator capable of regulating light |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100785A (en) * | 2016-07-28 | 2016-11-09 | 北京交通大学 | A kind of auto-manual adjustable optical attenuator |
| CN106679701A (en) * | 2017-01-11 | 2017-05-17 | 桂林恒毅金宇通信技术有限公司 | Passive entrance guard sensor |
| CN115453686A (en) * | 2022-09-05 | 2022-12-09 | 广西电网有限责任公司来宾供电局 | LC type optical fiber based on dynamic adjustment of light attenuation and use method |
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| Publication number | Publication date |
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| CN103744144B (en) | 2016-04-20 |
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