CN104238014A - Parallel optical fiber cladding light filtering device - Google Patents
Parallel optical fiber cladding light filtering device Download PDFInfo
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- CN104238014A CN104238014A CN201410432591.XA CN201410432591A CN104238014A CN 104238014 A CN104238014 A CN 104238014A CN 201410432591 A CN201410432591 A CN 201410432591A CN 104238014 A CN104238014 A CN 104238014A
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- cladding light
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Abstract
The invention provides a parallel optical fiber cladding light filtering device which comprises a target filtering optical fiber. Multiple parallel optical fibers are parallel to the target filtering optical fiber and make tight contact with the target filtering optical fiber. According to the parallel optical fiber cladding light filtering device, the optical fibers are large in flexibility, short in filtering length and easy to control.
Description
Technical field
The present invention relates to Fiber laser technology field, particularly relate to a kind of parallel optical fibre cladding light filtering device.
Background technology
Along with the development of Fiber laser technology, optical fiber fan-out capability constantly promotes, and at some specific area, needs to discharge through-put power in fibre cladding.Such as in the pumping filtering that gain afterbody carries out, and in order to improve the brightness of output, filtering being carried out to the power transmitted in covering, obtaining pure fibre core and exporting.
The technology of filtering covering power and equipment can be provided at present to have a lot, but for traditional filtering technique, the covering of optical fiber is introduced other materials, equipment or is drawn by hacking the modes such as cone directly to process fibre cladding.The power that these modes current can tolerate is at the hectowatt order of magnitude, and meanwhile, its outstanding safety problem is cause filtering partial failure after filtering power breaches the maximum safe limit of stripper.Usually the inefficacy caused has: index matching self-absorption causes material overheating deforming even to burn; The optical phenomenas such as the self-focusing caused in matching layer; Fibre cladding because the reason of stress is cracked, burst; The too high fibre core that causes of temperature of optical fiber core caused due to heat-sinking capability difference presents molten condition.These all make a big impact for former fiber laser system.Usually when after the covering stripper failure damage acting on former fiber laser system, former laser system can not normally work.
Meanwhile, conventional bag metafiltration usually occurs on the fiber lengths of several centimetres for the filtering of cladding light except technique, current technical merit be difficult to control cladding light in former optical fiber lentamente filtering go out.Such as, adopt refractive index matching layers to apply the mode of former fibre cladding, its filtering ability for some specific numerical aperture light is usually at about 3dB/cm.And concept slowly mentioned above is by the magnitude of filtering capability control at 1dB/m.
Summary of the invention
The present invention is intended to solve one of technical matters in correlation technique at least to a certain extent.
For this reason, the object of the invention is to propose that a kind of flexibility is large, filtering length is short, be convenient to a kind of parallel optical fibre cladding light filtering device of controlling.
To achieve these goals, a kind of parallel optical fibre cladding light filtering device of the embodiment of the present invention, comprising: target filtering optical fiber; Many parallel optical fibres, described many parallel optical fibres and described target filtering optical fiber walk abreast and close contact is arranged each other.
According to a kind of parallel optical fibre cladding light filtering device of the embodiment of the present invention, adopt the mode that parallel optical fibre contacts with target filtering close fiber optic, cladding light in target filtering optical fiber evenly and is lentamente diffused in environment go, this optical fiber is flexible large, filtering length is short, is convenient to control and safe filtering.
In some instances, the process of described parallel optical fibre cladding light filtering device filtering cladding light is: described cladding light little by little enters the covering of described many parallel optical fibres by the covering of described target filtering optical fiber; Carrying out covering filtering process to described many parallel optical fibres makes the cladding light in described many parallel optical fibres be dissipated in environment.
In some instances, the refractive index of the covering of described many parallel optical fibres is more than or equal to the refractive index of the covering of described target filtering optical fiber.
In some instances, whole or the setting of segment section close contact of described target filtering optical fiber and described many parallel optical fibres.
In some instances, between described many parallel optical fibres and described target filtering optical fiber by welding or press attached mode close contact.
In some instances, described many parallel optical fibres are have fibre core, do not have fibre core or in covering middle section, have the parallel optical fibre of fibre core.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of parallel optical fibre cladding light filtering device according to an embodiment of the invention;
Fig. 2 is the structural representation of the parallel optical fibre cladding light filtering device of one embodiment of the invention;
Fig. 3 is the structural representation of the parallel optical fibre cladding light filtering device of another embodiment of the present invention;
Fig. 4 is the structural representation of the parallel optical fibre cladding light filtering device of another embodiment of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Fig. 1 is the structured flowchart of parallel optical fibre cladding light filtering device according to an embodiment of the invention.As shown in Figure 1, the optical fiber of the embodiment of the present invention, comprising: target filtering optical fiber 100 and Duo Gen parallel optical fibre 200.Wherein, many parallel optical fibres 200 with target filtering optical fiber 100 parallel and each other close contact arrange.
Particularly, in one embodiment of the invention, whole or the setting of segment section close contact of target filtering optical fiber 100 and Duo Gen parallel optical fibre 200.By welding or press attached mode close contact between many parallel optical fibres 200 and target filtering optical fiber 100.
In one embodiment of the invention, many parallel optical fibres 200 for having fibre core, not there is fibre core or there is the parallel optical fibre of fibre core in covering middle section.
Further, the parallel optical fibre cladding light filtering device of the embodiment of the present invention, also comprises: covering stripper 300, and it is for carrying out filtering to the covering in many parallel optical fibres 200, with the cladding light in filtering target filtering optical fiber 100.Process avoids optical fiber in fiber laser system directly to environment filtering cladding light, thus avoid owing to damaging the impact caused fiber laser system when traditional handicraft reaches power limit.
In one embodiment of the invention, covering stripper 300 carries out covering filtering to whole of many parallel optical fibres 200 or part.This mode can on very long fiber lengths little by little filtering cladding light, the filtering pressure dissipation by target filtering optical fiber goes on whole section of parallel optical fibre length.
In one embodiment of the invention, the refractive index of the covering of many parallel optical fibres 200 is more than or equal to the refractive index of the covering of target filtering optical fiber 100.
In one embodiment of the invention, the process of this parallel optical fibre cladding light filtering device filtering cladding light is: cladding light little by little enters 200 coverings of many parallel optical fibres by the covering of described target filtering optical fiber 100.Adopting cladding light stripper 300 to carry out covering filtering process to many parallel optical fibres 200 makes the cladding light in many parallel optical fibres 200 be dissipated in environment.
Below for a root object filtering optical fiber and a parallel optical fibre, illustrate that the cladding light filtering course of work of the optical fiber of the embodiment of the present invention is as follows:
When after the close root object filtering optical fiber of refractive index and a parallel optical fibre contacted in parallel, contact here refers to the close contact state that external force clamps even welding.The light transmitted in two fibre claddings can enter mutually in the covering of the other side and propagate.After certain length, the cladding light transmitted in final two optical fiber is identical, and is the half of the cladding light summation propagated in original two optical fiber.Filtering process is carried out to this root parallel optical fibre simultaneously.Like this through a segment length, the cladding light in target filtering optical fiber constantly enters parallel optical fibre, again constantly from parallel optical fibre filtering to environment, thus achieves the cladding light filtering of target filtering optical fiber.This mode achieves above-mentioned filtering process and former optical fiber independently object.This process is simultaneously a process very slowly because the cladding light in target filtering optical fiber enters parallel optical fibre, which ensure that overall filtering is also a process very slowly.
Optical fiber such as shown in Fig. 2,1 is the parallel optical fibre that a process necessarily processes, and this optical fiber adopts the material identical with the covering 22 of target filtering optical fiber 21.Parallel optical fibre after treatment, 12,13 positions, have peeled off the coat of parallel optical fibre, make the covering of this root optical fiber out exposed in this section of region.The mode of index matching is adopted to configure traditional covering stripper on these two sections exposed fibre claddings.
Wherein, untreated fiber lengths does not illustrate in the drawings pro rata, and in the system of reality, untreated parallel optical fibre length is longer than the part needing configuration packet layer stripper through process far away.This is to ensure that the cladding light transmitted in target filtering optical fiber can have enough length to enter parallel optical fibre.The clad material of this root parallel optical fibre is in the present embodiment the same with the clad material of target filtering optical fiber, is the quartz pushrod not containing fibre core.
As shown in Figure 3,21 is target filtering optical fiber, and 22 is target filtering fibre cladding, and 3 for have employed the parallel optical fibre that certain technological means contacts with 2.Here mentioned technological means is after the coat divesting target filtering optical fiber and parallel optical fibre, by two close fiber optic laminatings.Use oxyhydrogen flame to carry out of short duration heating along fiber length simultaneously, make with on the basis of optical characteristics, it to be combined closely with parallel optical fibre not destroying target filtering optical fiber structure.24,25, be the covering stripper adopting traditional handicraft.26,27 is the close contact section of parallel optical fibre and target filtering optical fiber.Shown by arrow direction is the cladding light transmission direction in fibre system.28 are depicted as the recoat coating that the heavy coating processing of carrying out target filtering optical fiber and parallel optical fibre contact segment formed.Play the effect of clamping and fixed fiber.
When having cladding light to propagate in target filtering optical fiber, by the part of combining closely with parallel optical fibre, cladding light is constantly transferred in parallel optical fibre and is propagated.After certain length, the cladding light total amount transmitted in parallel optical fibre reaches the half in the former cladding light content of target optical fiber.Then through a filtering device, by this part of luminous energy filtering in environment.Constantly repeat this process, make the cladding light content transmitted in target filtering optical fiber level off to zero gradually.
In another embodiment of the present invention, as shown in Figure 3, the parallel optical fibre 31 that a process necessarily processes, parallel optical fibre after treatment, whole section of optical fiber has carried out the process of covering hacking, makes the cladding light transmitted on this root optical fiber constantly to diffuse in environment.The material that the covering of this root optical fiber in the present embodiment adopts is consistent with the clad material of target filtering optical fiber, is the quartz pushrod not containing fibre core.32 is target filtering optical fiber, and 33 is target filtering fibre cladding, 31 on one section of fiber lengths with target filtering optical fiber 32 close contact.
When having cladding light to propagate in target filtering optical fiber, by the part of combining closely with parallel optical fibre, cladding light is constantly transferred in parallel optical fibre and is propagated.Meanwhile, the cladding light in parallel optical fibre, because fibre cladding surface is by hacking, constantly diffuses in environment and goes.After certain length, the cladding light content of the covering target filtering optical fiber of parallel optical fibre levels off to zero simultaneously.
According to the parallel optical fibre cladding light filtering device of the embodiment of the present invention, adopt the mode that parallel optical fibre contacts with target filtering close fiber optic, cladding light in target filtering optical fiber evenly and is lentamente diffused in environment go, this optical fiber is flexible large, filtering length is short, is convenient to control and safe filtering.
In the description of this instructions, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this instructions or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (7)
1. a parallel optical fibre cladding light filtering device, is characterized in that, comprising:
Target filtering optical fiber;
Many parallel optical fibres, described many parallel optical fibres and described target filtering optical fiber walk abreast and close contact is arranged each other.
2. parallel optical fibre cladding light filtering device according to claim 1, is characterized in that, the process of described parallel optical fibre cladding light filtering device filtering cladding light is:
Described cladding light little by little enters the covering of described many parallel optical fibres by the covering of described target filtering optical fiber;
Carrying out covering filtering process to described many parallel optical fibres makes the cladding light in described many parallel optical fibres be dissipated in environment.
3. parallel optical fibre cladding light filtering device according to claim 1, is characterized in that, the refractive index of the covering of described many parallel optical fibres is more than or equal to the refractive index of the covering of described target filtering optical fiber.
4. parallel optical fibre cladding light filtering device according to claim 1, is characterized in that, whole or the setting of segment section close contact of described target filtering optical fiber and described many parallel optical fibres.
5. parallel optical fibre cladding light filtering device according to claim 1, is characterized in that, described covering stripper carries out covering filtering to whole of many parallel optical fibres described in every root or part.
6. parallel optical fibre cladding light filtering device according to claim 1, is characterized in that, by welding or press attached mode close contact between described many parallel optical fibres and described target filtering optical fiber.
7. the parallel optical fibre cladding light filtering device according to any one of claim 1-6, is characterized in that, described many parallel optical fibres are have fibre core, do not have fibre core or in covering middle section, have the parallel optical fibre of fibre core.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410432591.XA CN104238014A (en) | 2014-08-28 | 2014-08-28 | Parallel optical fiber cladding light filtering device |
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| CN201410432591.XA CN104238014A (en) | 2014-08-28 | 2014-08-28 | Parallel optical fiber cladding light filtering device |
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| CN104238014A true CN104238014A (en) | 2014-12-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161959A (en) * | 2015-09-02 | 2015-12-16 | 清华大学 | Unidirectional fiber cladding light filter and fiber laser device |
| CN107293931A (en) * | 2016-04-01 | 2017-10-24 | 中国兵器装备研究院 | A kind of cladding light dissipation device |
| CN112213821A (en) * | 2020-09-30 | 2021-01-12 | 西南技术物理研究所 | Optical fiber guide type high-power optical fiber cladding optical stripper capable of deeply stripping |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0634819A (en) * | 1992-07-22 | 1994-02-10 | Shin Etsu Chem Co Ltd | Optical fiber type attenuator |
| WO2008123609A1 (en) * | 2007-04-04 | 2008-10-16 | Mitsubishi Electric Corporation | Laser processing apparatus and laser processing method |
| CN103257399A (en) * | 2013-04-26 | 2013-08-21 | 中国人民解放军国防科学技术大学 | Device used for fiber laser and capable of filtering out cladding light |
-
2014
- 2014-08-28 CN CN201410432591.XA patent/CN104238014A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0634819A (en) * | 1992-07-22 | 1994-02-10 | Shin Etsu Chem Co Ltd | Optical fiber type attenuator |
| WO2008123609A1 (en) * | 2007-04-04 | 2008-10-16 | Mitsubishi Electric Corporation | Laser processing apparatus and laser processing method |
| CN103257399A (en) * | 2013-04-26 | 2013-08-21 | 中国人民解放军国防科学技术大学 | Device used for fiber laser and capable of filtering out cladding light |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161959A (en) * | 2015-09-02 | 2015-12-16 | 清华大学 | Unidirectional fiber cladding light filter and fiber laser device |
| CN107293931A (en) * | 2016-04-01 | 2017-10-24 | 中国兵器装备研究院 | A kind of cladding light dissipation device |
| CN107293931B (en) * | 2016-04-01 | 2019-07-26 | 中国兵器装备研究院 | A kind of cladding light dissipation device |
| CN112213821A (en) * | 2020-09-30 | 2021-01-12 | 西南技术物理研究所 | Optical fiber guide type high-power optical fiber cladding optical stripper capable of deeply stripping |
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Application publication date: 20141224 |