CN2638077Y - All optical fibre variable light attenuator - Google Patents
All optical fibre variable light attenuator Download PDFInfo
- Publication number
- CN2638077Y CN2638077Y CNU032774540U CN03277454U CN2638077Y CN 2638077 Y CN2638077 Y CN 2638077Y CN U032774540 U CNU032774540 U CN U032774540U CN 03277454 U CN03277454 U CN 03277454U CN 2638077 Y CN2638077 Y CN 2638077Y
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- CN
- China
- Prior art keywords
- optical fiber
- fiber
- optical
- push rod
- governor motion
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- Expired - Fee Related
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Abstract
The utility model relates to an all-fiber variable optical attenuator, comprising a fiber 21, a fiber winding plate 22, a fiber ejector pin 231, a device supporting shell 24 and a fiber ejector pin adjusting mechanism 23. The utility model is characterized in that: the fiber winding plate 22 consists of a cylinder 221 with a groove, a limited post 223 and a stop 224 and is fixed to the device supporting shell 24 by a fixed screw 222; the fiber 21 winds into a spiral coil 213 on the fiber winding plate 22, and the two ends are introduced out, wherein one end is used as an input end 211 and the other end is used as an output end 212; the fiber ejector pin 231 is pressed on the spiral coil 213 at the groove of the fiber winding plat; the fiber ejector pin adjusting mechanism is of manual mode or electric mode. The utility model has the advantages of small insertion loss, large dynamic range of attenuation regulation, simple structure, and low production cost, etc.
Description
One, technical field
The utility model relates to a kind of variable optical attenuator, refers to a kind of full fiber type variable optical attenuator based on bending loss of optical fiber especially.
Two, technical background
The full fiber type attenuator is a kind of device that each signal path in optical transmission line or the optical fiber link is carried out power-balance or adjusting, can be used in optical fiber telecommunications system, fiber optic network, optical fiber measurement system and the optical fiber sensing system, play optical power attenuation and regulate.
For variable optical attenuator, the present technology that the adopts optically-active element type optical attenuation technologies that mainly contains mechanical light-barrier type, variable density optical filtering chip and realize the light variable attenuation by the function element that quartz wave-plate, magneto-optical crystal, liquid crystal etc. have an optically-active characteristic.These technology have characteristics separately, can both satisfy certain needs, but the technology that all exists realizes problems such as difficulty, complex structure, cost height.
Three, technology contents
The purpose of this utility model is to provide a kind of full fiber type, is easy to adjustment, simple in structure and optical power attenuation device with low cost.
The purpose of this utility model is achieved in that a kind of full fiber type variable optical attenuator, comprise optical fiber, optical fiber drum, optical fiber push rod, device support shell and optical fiber push rod governor motion, it is characterized by: the optical fiber drum is made up of band groove right cylinder, limited post, block, be fixed on the device support shell by gib screw, the stop limits fiber optic coils makes it not loose.Optical fiber is the coiling coil on the optical fiber drum, and draw at its two ends, and an end is as input end, and the other end is as output terminal, and light signal is exported from the other end from end input.The optical fiber push rod is pressed on the fiber optic coils of optical fiber drum groove, makes fibre-optical bending, introduces loss and realizes decay.Optical fiber push rod governor motion is realized the front and back displacement of optical fiber push rod with manual or electronic dual mode, regulates the fibre-optical bending amount.
Be fixed fiber, a pair of pressing plate is arranged on optical fiber.
The optic fibre input end and the output terminal that do not fracture at the device support shell for protection optical fiber respectively have a Capsule.
Optical fiber push rod governor motion is a manual mode, and this governor motion comprises fixedly limited block, spring, gib screw, thread bush and set screw.Drive push rod when set screw moves forward and backward and move forward and backward, spring makes push rod generation expulsive force backward.
The utility model is to adopt the directly principle of decay of optical fiber, and its dynamic range is big, can reach more than the 65dB, because the loss of optical fiber itself is low, thereby make this optical attenuator insertion loss little, owing to need not realize decay by expensive optical device, make structural design simple, cost is also less.
Compared with prior art, the utlity model has simple in structure, its technical indicator can reach dynamic range greater than 65dB, less than the insertion loss of 0.2dB, be better than the thermal stability of 0.5dB, have the resolution height simultaneously, insert superiority such as loss is little, decay adjusting dynamic range is big, simple in structure, with low cost.
Four, description of drawings
Fig. 1 is the utility model full fiber type variable optical attenuator optical power attenuation schematic diagram.
Fig. 2 is the utility model full fiber type variable optical attenuator sectional view.
Fig. 3 is the utility model full fiber type variable optical attenuator sectional view.
Five, embodiment
The principle of the utility model full fiber type variable optical attenuator is as shown in Figure 1: optical fiber 21 is on band groove cylindrical fiber drum 22, its two ends 211,212 input/output port as light signal, when optical fiber push rod 231 is positioned on the fiber optic coils 213 of optical fiber drum groove, fibre-optical bending, optical fiber push rod 231 present position differences, fibre-optical bending degree difference, the light signal of transmission causes the degree difference of optical power attenuation because of leaking in optical fiber 21.
The structure of the utility model full fiber type variable optical attenuator such as Fig. 2, shown in Figure 3 comprise: optical fiber 21, fine drum 22, optical fiber push rod 231, manual optical fiber push rod governor motion 23, device support shell 24.Optical fiber 21 is coiling coil 213 on optical fiber drum 22, and draw at its two ends, and an end is as input end 211, and the other end is as output terminal 212, and light signal is exported from the other end from end input.The optical fiber drum is made up of band groove right cylinder 221, limited post 223, block 224, is fixed on the device support shell 24 by gib screw 222, and block 224 limit fibre coils 213 make it not loose.Pressing plate 251 is used for fixing optical fiber 21, and Capsule 252 protection optical fiber 21 do not fracture.Optical fiber push rod 231 is pressed on the fiber optic coils 213 of optical fiber drum groove, makes fibre-optical bending, introduces loss and realizes decay.Wherein manually optical fiber push rod governor motion comprises fixedly limited block 232, spring 233, gib screw 234, thread bush 235 and set screw 236.Drive push rod 231 when set screw 236 moves forward and backward and move forward and backward, the expulsive force that spring 233 produces backward push rod 231.Optical fiber drum 22 and governor motion 23 are fixed on and become as a whole on the device support shell body 24, and loam cake 241 is used for device sealing.
Claims (4)
1. full fiber type variable optical attenuator, comprise optical fiber 21, optical fiber drum 22, optical fiber push rod 231, device support shell 24 and optical fiber push rod governor motion 23, it is characterized by: optical fiber drum 22 is made up of band groove right cylinder 221, limited post 223, block 224, is fixed on the device support shell 24 by gib screw 222; Optical fiber 21 is coiling coil 213 on optical fiber drum 221, and draw at its two ends, and an end is as input end 211, and the other end is as output terminal 212; Optical fiber push rod 231 is pressed on the fiber optic coils 213 of optical fiber drum groove; Optical fiber push rod governor motion is manual mode or electronic mode.
2. full fiber type variable optical attenuator as claimed in claim 1 is characterized in that: a pair of pressing plate 251 is arranged on optical fiber 21.
3. full fiber type variable optical attenuator as claimed in claim 1 is characterized in that: optic fibre input end and output terminal at device support shell 24 respectively have a Capsule 252.
4. full fiber type variable optical attenuator as claimed in claim 1 is characterized in that: optical fiber push rod governor motion is a manual mode, and this governor motion comprises fixedly limited block 232, spring 233, gib screw 234, thread bush 235 and set screw 236.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032774540U CN2638077Y (en) | 2003-08-07 | 2003-08-07 | All optical fibre variable light attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032774540U CN2638077Y (en) | 2003-08-07 | 2003-08-07 | All optical fibre variable light attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2638077Y true CN2638077Y (en) | 2004-09-01 |
Family
ID=34302815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032774540U Expired - Fee Related CN2638077Y (en) | 2003-08-07 | 2003-08-07 | All optical fibre variable light attenuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2638077Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013184B (en) * | 2005-12-06 | 2011-05-25 | 日本电气株式会社 | Method and apparatus for adjusting loss caused by optical fiber curvature, and optical transmission system using the same |
| WO2012080715A1 (en) * | 2010-12-15 | 2012-06-21 | Oclaro Technology Limited | Method and apparatus for controlling distributed attenuation in an optical fibre |
-
2003
- 2003-08-07 CN CNU032774540U patent/CN2638077Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013184B (en) * | 2005-12-06 | 2011-05-25 | 日本电气株式会社 | Method and apparatus for adjusting loss caused by optical fiber curvature, and optical transmission system using the same |
| WO2012080715A1 (en) * | 2010-12-15 | 2012-06-21 | Oclaro Technology Limited | Method and apparatus for controlling distributed attenuation in an optical fibre |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |