CN203573005U - Light power monitor - Google Patents
Light power monitor Download PDFInfo
- Publication number
- CN203573005U CN203573005U CN201320590209.9U CN201320590209U CN203573005U CN 203573005 U CN203573005 U CN 203573005U CN 201320590209 U CN201320590209 U CN 201320590209U CN 203573005 U CN203573005 U CN 203573005U
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- China
- Prior art keywords
- light
- optical fiber
- fibers
- downstream
- power monitor
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- Expired - Lifetime
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Abstract
The utility model relates to the field of light communication, in particular to a light power monitor which comprises a light receiver, upstream light fibers and downstream light fibers. The fibers comprise fiber cores placed in the centers of the fibers and wrapping layers surrounding the fiber cores. The end faces of the upstream light fibers and the end faces of the downstream light fibers deviate for a certain distance in the radial direction and are welded together to form a welding part. The light power monitor is characterized in that a light guide which is attached on the outer surface of the wrapping layers of the downstream light fibers is included, the refractive index of the light guide and the refractive index of the downstream wrapping layers are close, one end of the light guide right faces a protrusion part of the upstream light fibers in the welding part, the other end of the light guide is provided with an oblique reflecting face, and light reflected by the reflecting face is received by the light receiver. Compared with a traditional method, the light fibers do not need to be bent, or a groove does not need to be formed in the light fiber wrapping layers to form the reflecting face, and the integrity of the light fibers can be maintained. Accordingly, loss in a light transmission process can be lowered, reliability is increased, and manufacturing using cost can be lowered.
Description
Technical field
The utility model relates to optical communication field, specifically optical power monitor.
Background technology
In optical communication field, by measuring the luminous power of shunting part light out from main Transmission Fibers with the connection status of sensed light signal intensity and light signal, become and built a requisite part in a high reliability optical communication system.For example, for a kind of Erbium-Doped Fiber Amplifier (EDFA), this optical power monitor plays key effect maintaining in the enlargement factor of light signal.
In existing technology, as shown in Figure 1, (US 7116870 B2) disclose a kind of optical power monitor, in continuous optical fiber, by annealing, bend for 2 times, make part light go out to spill from main Transmission Fibers.By being laser-ablated on the covering of optical fiber, manufactured a groove, formed one and had and the vertical reflecting surface that becomes about 44 ° of angles of optical axis, after making to be incident on its surperficial light reflection, guided in a photodetector.
As shown in Figure 2, CN101038356 also discloses a kind of optical power monitor.This design, by 2 optical fiber of splicing, makes light core mutually depart from optical axis, on certain position of downstream optical fiber covering, is provided with V-shaped groove.Thereby allow the light of upstream fiber separate leakage from weld end face teat.The light spilling enters the covering of downstream optical fiber.Via the reflecting surface on V-shaped groove, reflex to a photodiode.Finally by photodiode, detected.
Above-mentioned prior art, owing to having bending or etching bath on optical fiber, has pair optical fiber to destroy to some extent.The light leak detecting is propagated at fibre cladding, easily produces and interferes and strengthen.The defect of this design is on the small optical fiber of diameter, to manufacture light reflection structure, also will make the light leak that goes out being reflected by coating surface produce interference.Need on optical fiber, manufacture the reliability that flat optical groove has also increased manufacturing cost and reduced equipment.While running into thermal expansion that environment causes and retraction, use the glass optical fiber of this technique manufacture to rupture.Optical interference effect needs the interior accurate placement for largest light intensity reflection configuration of optical fiber, and this is also that wavelength relies on.These defects have increased its manufacturing cost, have also reduced the reliability of equipment.
Summary of the invention
The technical problems to be solved in the utility model is: the problem that reliability is low, manufacturing cost is high that in prior art, optical power monitor exists.The utility model, retaining under the condition of optical fiber integrality, provides a kind of reliability high, the solution of low cost of manufacture.Concrete scheme is:
optical power monitor, comprise optical receiver, upstream fiber and downstream optical fiber, optical fiber comprises and is in the fibre core at its center and around the covering of fibre core, the end face of described upstream fiber and downstream optical fiber is radially offset certain distance and is welded together and becomes weld portion, it is characterized in that: also comprise the photoconduction on the covering outside surface that is close to described downstream optical fiber, the refractive index of the refractive index of described photoconduction and described downstream optical fiber covering is close, one end of described photoconduction is over against described weld portion middle and upper reaches optical fiber jut, and the other end is provided with the reflecting surface of inclination, the light leak of described reflecting surface reflection is that described optical receiver receives.
The material of described photoconduction is glass.
Described photoconduction is used the close epoxy resin of refractive index to stick on the covering outside surface of described downstream optical fiber.
The distance that the fibre core of described weld portion middle and upper reaches optical fiber and downstream optical fiber is offset is mutually core diameter 0.01 to 0.52 times.
Described optical receiver is photodiode.
For guaranteeing that optical fiber is operated under varying environment reliably, also comprise the encapsulation box in described upstream fiber, downstream optical fiber, photoconduction and optical receiver are encapsulated in, described encapsulation box material is glass or pottery.
The utility model, without curved fiber the method as traditional or groove is set on fibre cladding to produce reflecting surface, because may damage like this integrality of optical fiber.Can reduce like this loss in light communication process and increase reliability.This optical power monitor, based on jointed fiber, has therefore reduced loss of light propagation and to wavelength dependency, also provides higher luminous power maneuverability simultaneously.The light leak that advantage of the present utility model is also to enter in photodiode once can not injected in air, has improved reliability.
Accompanying drawing explanation
Fig. 1 is prior art US 7116870 B2 schematic diagram.
Fig. 2 is prior art CN101038356 schematic diagram.
Fig. 3 is principle schematic of the present utility model.
Fig. 4 is the utility model embodiment assembly drawing.
In figure: 1-upstream fiber; 11-upstream fiber fibre core; 12 upstream fiber coverings; 2-downstream optical fiber; 21-downstream optical fiber fibre core; 22-downstream optical fiber covering; 3-photoconduction; 31-reflecting surface; 4-photodiode; 5-weld portion; 6-light leak light beam; 7-encapsulates box.
embodiment
As shown in Figure 3, optical power monitor, comprise photodiode 4, upstream fiber 1 and downstream optical fiber 2, optical fiber comprises the fibre core 11(21 that is in its center) and around the covering 12(22 of fibre core), the end face of upstream fiber fibre core 11 and downstream optical fiber fibre core 21 is radially offset 0.01 to 0.52 times of core diameter, and is mutually welded together and becomes weld portion 5.On downstream optical fiber covering 22 outside surfaces, use the epoxy resin photoconduction 3 that refractive index is identical to be close to, the refractive index of the refractive index of photoconduction 3 and downstream optical fiber covering 22 is close, one end of photoconduction 3 is over against weld portion 5 middle and upper reaches fiber core 11 juts, and photoconduction 3 other ends are provided with the reflecting surface 31 of inclination.
Because upstream and downstream optical fiber staggers mutually in weld portion 5, from the light signal of upstream fiber 1 when the weld portion 5, have part light to enter downstream optical fiber covering 22 by jut light leak and propagate, this light leak light beam 6 is injected photoconduction 3, and the light leak light beam 6 reflecting through reflecting surface 31 is received by photodiode 4.By the electric signal of monitor photodiode 4, thus luminous power status transmission in monitoring optical fiber.
Fig. 4 is a kind of encapsulation figure of the utility model optical power monitor.In encapsulation box 7 is encapsulated in upstream fiber 1, downstream optical fiber 2, photoconduction 3 and photodiode 4, encapsulation box 7 is glass or pottery or other material close with optical fiber thermal expansivity.
Claims (6)
1. optical power monitor, comprise optical receiver, upstream fiber and downstream optical fiber, optical fiber comprises and is in the fibre core at its center and around the covering of fibre core, the end face of described upstream fiber and downstream optical fiber is radially offset certain distance and is welded together and becomes weld portion, it is characterized in that: also comprise the photoconduction on the covering outside surface that is close to described downstream optical fiber, the refractive index of the refractive index of described photoconduction and described downstream optical fiber covering is close, one end of described photoconduction is over against described weld portion middle and upper reaches optical fiber jut, and the other end is provided with the reflecting surface of inclination, the light leak of described reflecting surface reflection is that described optical receiver receives.
2. optical power monitor according to claim 1, is characterized in that: the material of described photoconduction is glass.
3. optical power monitor according to claim 1, is characterized in that: described photoconduction is used the close epoxy resin of refractive index to stick on described downstream optical fiber covering outside surface.
4. optical power monitor according to claim 1, is characterized in that: the distance that the fibre core of described weld portion middle and upper reaches optical fiber and downstream optical fiber is offset is mutually core diameter 0.01 to 0.52 times.
5. optical power monitor according to claim 1, is characterized in that: described optical receiver is photodiode.
6. optical power monitor according to claim 1, is characterized in that: also comprise the encapsulation box in described upstream fiber, downstream optical fiber, photoconduction and optical receiver are encapsulated in, described encapsulation box material is glass or pottery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320590209.9U CN203573005U (en) | 2013-09-24 | 2013-09-24 | Light power monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320590209.9U CN203573005U (en) | 2013-09-24 | 2013-09-24 | Light power monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203573005U true CN203573005U (en) | 2014-04-30 |
Family
ID=50540732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320590209.9U Expired - Lifetime CN203573005U (en) | 2013-09-24 | 2013-09-24 | Light power monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203573005U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513349A (en) * | 2013-09-24 | 2014-01-15 | 广西安捷讯电子科技有限公司 | Light power monitor |
| JP2017003612A (en) * | 2015-06-04 | 2017-01-05 | 日立金属株式会社 | Communication light visualization cord and communication light detector |
| CN108507477A (en) * | 2018-05-04 | 2018-09-07 | 北京交通大学 | A kind of thermal cracking sensor based on less fundamental mode optical fibre and fiber bragg grating |
| CN112684551A (en) * | 2021-01-18 | 2021-04-20 | 深圳市迅特通信技术股份有限公司 | ROSA module for light splitting monitoring feedback control and control method |
-
2013
- 2013-09-24 CN CN201320590209.9U patent/CN203573005U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513349A (en) * | 2013-09-24 | 2014-01-15 | 广西安捷讯电子科技有限公司 | Light power monitor |
| JP2017003612A (en) * | 2015-06-04 | 2017-01-05 | 日立金属株式会社 | Communication light visualization cord and communication light detector |
| CN108507477A (en) * | 2018-05-04 | 2018-09-07 | 北京交通大学 | A kind of thermal cracking sensor based on less fundamental mode optical fibre and fiber bragg grating |
| CN112684551A (en) * | 2021-01-18 | 2021-04-20 | 深圳市迅特通信技术股份有限公司 | ROSA module for light splitting monitoring feedback control and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |
|
| CX01 | Expiry of patent term |