CN102255227A - Fiber cladding light filter and manufacturing method thereof - Google Patents
Fiber cladding light filter and manufacturing method thereof Download PDFInfo
- Publication number
- CN102255227A CN102255227A CN 201110112212 CN201110112212A CN102255227A CN 102255227 A CN102255227 A CN 102255227A CN 201110112212 CN201110112212 CN 201110112212 CN 201110112212 A CN201110112212 A CN 201110112212A CN 102255227 A CN102255227 A CN 102255227A
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- fiber
- cladding
- covering
- optical fiber
- breach
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- 239000000835 fiber Substances 0.000 title claims abstract description 62
- 238000005253 cladding Methods 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 36
- 239000000498 cooling water Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000013307 optical fiber Substances 0.000 claims description 52
- 238000000034 method Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 239000013043 chemical agent Substances 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 230000003685 thermal hair damage Effects 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Abstract
The invention discloses a fiber cladding light filter and a manufacturing method thereof. In the fiber cladding light filter, a section of coating layer of a single-cladding fiber or a section of coating layer and an outer cladding of a double-cladding fiber are removed; the surface of an exposed cladding or an inner cladding is roughened by using a cutting knife or a chemical agent; total reflection conditions of pumping light and cladding laser in the cladding of the single-cladding fiber and the inner cladding of the double-cladding fiber are destroyed; a section of the fiber is sealed in a metal container with a water inlet and a water outlet; and flowing cooling water is filled into the metal container. The fiber cladding light filter is simple in structure and high in filtering efficiency, can bear filtered cladding light with higher power and prevent thermal damage on a component and can be applied to a high-power fiber laser and a high-power fiber amplifier.
Description
Technical field
The present invention relates to fiber laser and fiber amplifier, particularly a kind of smooth pricker covering light stripper and manufacture method thereof.
Background technology
In powerful fiber laser and fiber amplifier, need before last output, come out pump light in the inner cladding of the covering of single cladded fiber or doubly clad optical fiber and laser filtering, improve the beam quality of final output light.Existing technology is that one section coat of one section coat of single cladded fiber or doubly clad optical fiber and surrounding layer are got rid of, the part of exposing out is dipped in the optical cement, because the refractive index ratio of optical cement needs the covering of filtering or the refractive index height of inner cladding, so pump light and laser in the covering of single cladded fiber or the inner cladding of doubly clad optical fiber can be leaked in the optical cement, reach the effect of filtering.Because optical cement has certain absorption to pump light and laser, luminous energy is changed into heat energy, can make the temperature of optical cement rise and surpass the threshold value that optical cement can bear, thereby limit the power of this fiber cladding light stripper institute energy filtering.
Summary of the invention
The objective of the invention is to overcome above-mentioned prior art problems, a kind of fiber cladding light stripper and manufacture method thereof be provided, with improve covering light stripper the power upper limit of energy filtering.
The technology of the present invention solves principle:
The one section coat and the surrounding layer of one section coat of single cladded fiber or doubly clad optical fiber are removed, make the covering of single cladded fiber that this section expose out or the inner cladding surface of doubly clad optical fiber be covered with small gap, make covering light in this surperficial incidence angle less than the cirtical angle of total reflection, destroy the total reflection condition of covering light.And the filtering covering light of going out incides on the wall that is radiated at canister in the cooling water then and converts heat energy to, and the cooling water that is flowed is taken away, overcome use thermal effect that the high index of refraction optical cement brought to the restriction of power of energy filtering.
The technology of the present invention solution is as follows:
A kind of fiber cladding light stripper, characteristics are that its formation comprises optical fiber, canister and the cooling-water machine for the treatment of filtering covering light, the sidewall of described canister has water inlet, delivery port, both ends of the surface respectively have the optical fiber through hole, the feed water inlet of described cooling-water machine links to each other with the water inlet of described canister, and the water return outlet of this cooling-water machine links to each other with the delivery port of described canister; The described optical fiber through hole for the treatment of single cladded fiber of filtering covering light by described canister, and the described single cladded fiber coat of filtering covering light for the treatment of divested one section fiber segment that is covered with breach that exposes covering, will treat that maybe the coat of doubly clad optical fiber of filtering covering light and surrounding layer divest one section fiber segment that is covered with breach that exposes inner cladding and place and be sealed in the described canister.
Described cooling-water machine is controlled at the temperature of cooling water between 15 to 30 degrees centigrade, and the flow of cooling water is greater than 1 liter/minute in the described canister.
The covering of described single cladded fiber for the treatment of filtering covering light or treat that the cross section of inner cladding of the doubly clad optical fiber of filtering covering light can be an Any shape, described fibre core can be single mode or multimode.
The preparation method of described fiber cladding light stripper comprises the steps:
1. the coat that will treat single cladded fiber of filtering covering light divests one section and exposes covering, will treat that maybe the coat of doubly clad optical fiber of filtering covering light and surrounding layer divest one section and expose inner cladding;
2. handle described covering that exposes or inner cladding, make the surface be covered with breach and be called optical fiber breach covering section, the degree of depth of this breach is greater than 1/2nd of this gap width, and the degree of depth of this breach and width are greater than the covering light wavelength, and this breach does not contact with the fibre core of optical fiber;
3. the described optical fiber of filtering covering light for the treatment of is passed the optical fiber through hole of described canister, make described optical fiber breach covering section place and be sealed in the described canister;
4. the feed water inlet with described cooling-water machine links to each other with the water inlet of described canister, and the water return outlet of this cooling-water machine links to each other with the delivery port of described canister.
The length of described optical fiber breach covering section is between 1 centimetre to 10 centimetres.
Between each breach on the described optical fiber breach covering section summation of smooth area account for this total surface area 10% to 90% between.
Contact seal place of described optical fiber two ends and canister should be positioned on the coat, and whole notched surface all should be sealed in the canister, and notched surface can not directly contact with canister.
Technique effect of the present invention:
Compared with prior art, the present invention has simple in structure, filtering efficient height, and the power of the filtering covering light that can bear is higher, can prevent the fire damage of device, can be used for high-capacity optical fiber laser and high-power fiber amplifier.
Description of drawings
Fig. 1 is the structural representation of fiber cladding light stripper of the present invention.
Fig. 2 is that fiber cladding light stripper of the present invention is implemented illustration.
Embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing, but should not limit protection scope of the present invention with this.
See also Fig. 1, Fig. 1 is the structural representation of fiber cladding light stripper of the present invention, as shown in the figure, fiber cladding light stripper of the present invention, characteristics are that its formation comprises optical fiber, canister 6 and the cooling-water machine 9 for the treatment of filtering covering light, described canister 6 sidewalls have water inlet, delivery port and both ends of the surface and have optical fiber through hole 7, and the feed water inlet of described cooling-water machine 9 links to each other with the water inlet of described canister 6, and the water return outlet of this cooling-water machine 9 links to each other with the delivery port of described canister 6; The described optical fiber through hole 7 for the treatment of single cladded fiber 1 of filtering covering light by described canister 6, and the described single cladded fiber coat 2 of filtering covering light for the treatment of divested one section fiber segment that is covered with breach that exposes covering 3, will treat that maybe the coat of doubly clad optical fiber 1 of filtering covering light and surrounding layer 2 divest one section fiber segment that is covered with breach that exposes inner cladding 3 and place and be sealed in the described canister 6.
Described cooling-water machine 9 is controlled at the temperature of cooling water between 15 to 30 degrees centigrade, and the flow of cooling water is greater than 1 liter/minute in the described canister 6.
The manufacture method of described fiber cladding light stripper comprises the steps:
1. the coat 2 that will treat single cladded fiber 1 of filtering covering light divests one section and exposes covering 3, will treat that maybe the coat of doubly clad optical fiber 1 of filtering covering light and surrounding layer 2 divest one section and expose inner cladding 3;
2. handle described covering that exposes or inner cladding 3, make the surface be covered with breach and be called optical fiber breach covering section 5, the degree of depth of this breach is greater than 1/2nd of this gap width, and the degree of depth of this breach and width are greater than the covering light wavelength, and this breach does not contact with the fibre core 4 of optical fiber;
3. the described optical fiber of filtering covering light for the treatment of is passed the optical fiber through hole 7 of described canister 6, make described optical fiber breach covering section 5 place and be sealed in the described canister 6;
4. the feed water inlet with described cooling-water machine 9 links to each other with the water inlet of described canister 6, and the water return outlet of this cooling-water machine 9 links to each other with the delivery port of described canister 6.
The length of described optical fiber breach covering section is between 1 centimetre to 10 centimetres.
Between each breach on the described optical fiber breach covering section 5 summation of smooth area account for this total surface area 10% to 90% between.
Fig. 2 is the application implementation illustration of fiber cladding light stripper of the present invention, and as shown in the figure, it is that the energy-transmission optic fibre of 400 μ m is as output optical fibre 1 that the output optical fibre of the full fiberize laser 8 of multikilowatt high power uses inner cladding 3 diameters.On output optical fibre, remove 6 centimetres of a segment lengths' coat 2 and surrounding layer, use the corrosion medicament that inner cladding 3 surface corrosions that this section exposes are out gone out many small gaps, then this section optical fiber breach covering section 5 is packed in the canister 6, with two optical fiber through hole 7 good seals.Water inlet on the canister and delivery port water pipe are connected respectively on the feed water inlet and water return outlet on the water cooling unit, pass to 25 ℃ cooling water, flow is 2 liters/minute.Install output collimation 10 at the end of output optical fibre.The about altogether 200W of pump light that participates in the output optical fibre and covering laser is come out by filtering, and the full cloth of laser of collimation head output comes from fibre core, and beam quality is good, near diffraction limit.Experiment shows that superheating phenomenon does not appear in fiber cladding light stripper.Fiber cladding light stripper of the present invention has simple in structure, filtering efficient height, and the power of the filtering covering light that can bear is higher, can prevent the fire damage of device, can be used for high-capacity optical fiber laser and high-power fiber amplifier.
Claims (5)
1. fiber cladding light stripper, be characterised in that its formation comprises optical fiber, canister (6) and the cooling-water machine (9) for the treatment of filtering covering light, the sidewall of described canister (6) has water inlet, delivery port, both ends of the surface respectively have optical fiber through hole (7), the feed water inlet of described cooling-water machine (9) links to each other with the water inlet of described canister (6), and the water return outlet of this cooling-water machine (9) links to each other with the delivery port of described canister (6); The described optical fiber through hole (7) for the treatment of single cladded fiber (1) of filtering covering light by described canister (6), and the described single cladded fiber coat (2) of filtering covering light for the treatment of divested one section fiber segment that is covered with breach that exposes covering (3), will treat that maybe the coat of doubly clad optical fiber (1) of filtering covering light and surrounding layer (2) divest one section fiber segment that is covered with breach that exposes inner cladding (3) and place and be sealed in the described canister (6).
2. fiber cladding light stripper according to claim 1 is characterized in that described cooling-water machine (9) is controlled at the temperature of cooling water between 15 to 30 degrees centigrade, and the flow of cooling water is greater than 1 liter/minute in the described canister (6).
3. the manufacture method of the described fiber cladding light of claim 1 stripper is characterized in that, this method comprises the steps:
1. the coat (2) that will treat single cladded fiber (1) of filtering covering light divests one section and exposes covering (3), will treat that maybe the coat of doubly clad optical fiber (1) of filtering covering light and surrounding layer (2) divest one section and expose inner cladding (3);
2. handle described covering that exposes or inner cladding (3), make the surface be covered with breach, be referred to as optical fiber breach covering section (5), the degree of depth of this breach is greater than 1/2nd of this gap width, the degree of depth of this breach and width are greater than the covering light wavelength, and this breach does not contact with the fibre core (4) of optical fiber;
3. the described optical fiber of filtering covering light for the treatment of is passed the optical fiber through hole (7) of described canister (6), make described optical fiber breach covering section (5) place and be sealed in the described canister (6);
4. the feed water inlet with described cooling-water machine (9) links to each other with the water inlet of described canister (6), and the water return outlet of this cooling-water machine (9) links to each other with the delivery port of described canister (6).
4. the manufacture method of fiber cladding light stripper according to claim 3 is characterized in that, the length of described optical fiber breach covering section is between 1 centimetre to 10 centimetres.
5. the manufacture method of fiber cladding light stripper according to claim 3 is characterized in that, between each breach on the described optical fiber breach covering section (5) summation of smooth area account for this total surface area 10% to 90% between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110112212A CN102255227B (en) | 2011-04-29 | 2011-04-29 | Fiber cladding light filter and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110112212A CN102255227B (en) | 2011-04-29 | 2011-04-29 | Fiber cladding light filter and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN102255227A true CN102255227A (en) | 2011-11-23 |
| CN102255227B CN102255227B (en) | 2012-08-29 |
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| CN201110112212A Active CN102255227B (en) | 2011-04-29 | 2011-04-29 | Fiber cladding light filter and manufacturing method thereof |
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| CN103490273A (en) * | 2013-10-10 | 2014-01-01 | 武汉锐科光纤激光器技术有限责任公司 | High-power optical fiber transmission system |
| CN103676051A (en) * | 2013-11-29 | 2014-03-26 | 深圳市创鑫激光技术有限公司 | Myriawatt-level high-power optical fiber end cap |
| CN103676002A (en) * | 2013-11-29 | 2014-03-26 | 深圳市创鑫激光技术有限公司 | High-power fiber mode stripper |
| GB2511923A (en) * | 2013-01-28 | 2014-09-17 | Jds Uniphase Corp | A cladding light stripper and method of manufacturing |
| CN104242026A (en) * | 2014-08-27 | 2014-12-24 | 清华大学 | Optical fiber wrapping layer light filter-out device and forming method thereof |
| EP2843450A1 (en) * | 2013-08-28 | 2015-03-04 | Ofs Fitel Llc, A Delaware Limited Liability Company | High-power liquid-cooled pump and signal combiner |
| CN104749694A (en) * | 2015-03-30 | 2015-07-01 | 深圳市创鑫激光股份有限公司 | Optical fiber mode stripper and manufacturing method thereof |
| CN104865638A (en) * | 2015-06-11 | 2015-08-26 | 哈尔滨工业大学 | Method for leaking cladding light in double-clad optical fiber |
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