CN113363796B - Packaging system of rod-shaped rare earth-doped optical fiber - Google Patents
Packaging system of rod-shaped rare earth-doped optical fiber Download PDFInfo
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- CN113363796B CN113363796B CN202110632961.4A CN202110632961A CN113363796B CN 113363796 B CN113363796 B CN 113363796B CN 202110632961 A CN202110632961 A CN 202110632961A CN 113363796 B CN113363796 B CN 113363796B
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- end cap
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06729—Peculiar transverse fibre profile
- H01S3/06741—Photonic crystal fibre, i.e. the fibre having a photonic bandgap
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0405—Conductive cooling, e.g. by heat sinks or thermo-electric elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0407—Liquid cooling, e.g. by water
Abstract
The invention provides a packaging system of a rod-shaped rare earth doped optical fiber, which comprises a rare earth doped optical fiber, an end cap, a metal heat conduction pipe, a water guide pipe and a tension-adjustable device. The input end and the output end of the rare earth doped rodlike optical fiber are respectively welded with the end caps in a welding mode, the tension control device is used for straightening the optical fiber without introducing shearing force, the metal heat conduction pipe wraps the optical fiber, heat conduction liquid is filled between the metal heat conduction pipe and the optical fiber and is sealed, the water guide pipe wraps the two end caps and the optical fiber with the metal heat conduction pipe, flowing liquid is filled between the water guide pipe and the metal heat conduction pipe, heat of the end caps and the metal heat conduction pipe is taken away, and the rare earth doped optical fiber is guaranteed to be effectively and uniformly cooled without introducing stress. The invention has the beneficial effects that: the rare earth doped optical fiber is convenient to mount, dismount and transport; the end cap is not easy to fall off due to shearing force; the end cap and the optical fiber have no difference in heat dissipation, the optical fiber is more uniform in heat dissipation, the problem of end cap tilting is avoided, and the shearing force of the end cap is greatly reduced; 360-degree heat dissipation without dead corners is greatly improved.
Description
Technical Field
The invention relates to the field of fiber lasers, in particular to a packaging system of a rod-shaped rare earth-doped fiber.
Background
In recent years, with the further development of ultra-fast fiber lasers towards higher power and higher energy, large-mode rare earth doped fibers, particularly rod-shaped photonic crystal fibers, are increasingly widely applied. The optical fiber has no coating layer structure, the diameter can reach 1mm, the diameter is far larger than that of a common optical fiber, and the service length is shorter than that of the common optical fiber and is generally about 0.8-1 m. In order to improve the damage threshold and reduce the influence of the external environment on the internal air hole structure, the two ends of the steel tube are required to be welded with end caps (6-8 mm) with large sizes. The rod-shaped photonic crystal fiber has the advantages of high amplification efficiency, good mode and small nonlinearity, but is not polarization-maintaining, cannot bear stress, cannot bend and has poor heat dissipation (surrounded by air holes), so that the problem to be solved by using the fiber is how to effectively package the rod-shaped photonic crystal fiber.
In a conventional packaging mode, an end cap is not effectively radiated, the temperature difference between the end cap and an optical fiber is obvious, the optical fiber is easy to tilt in a vertical dimension, and a copper rubber tape cannot be well fixed for a long time, so that an output light spot is obviously displaced, and the performance of a laser is influenced. The direct introduction shearing force of end cap and optical fiber fusion splice among the prior art for the splice point becomes very fragile easy impaired, and in addition, optic fibre is whole unsettled, and wind-force is the stress that rod-like optic fibre can not bear, can lead to the optic fibre performance like: the mode, the mode field, the amplification efficiency, the polarization state retention and the like are changed, so that the method is not suitable for uniform heat dissipation required by a space-coupled rod-shaped optical fiber amplifier, does not consider the problem of heat dissipation of an end cap, does not consider the problem of performance change (mode, mode field, amplification efficiency, polarization state retention and the like) of the amplification optical fiber caused by nonuniform heat dissipation, and does not consider the problem of performance change caused by stress of the optical fiber.
Disclosure of Invention
In order to solve the above problems, the present invention provides a packaging system for a rod-shaped rare earth doped optical fiber, which is used to ensure that the rod-shaped rare earth doped optical fiber can effectively and uniformly dissipate heat without introducing stress, and mainly comprises: the device comprises rare earth doped optical fibers, an end cap group, a heat conduction pipe, heat conduction liquid, a water guide pipe, liquid and a tension control device, wherein the end cap group comprises a first end cap and a second end cap; the heat conduction pipe is located in the water guide pipe, the rare earth doped optical fiber is located in the heat conduction pipe, two ends of the rare earth doped optical fiber and two ends of the heat conduction pipe are respectively connected with the inner side of the first end cap and the inner side of the second end cap, two ends of the heat conduction pipe are respectively connected with the first end cap and the second end cap, parts of the first end cap and the second end cap are located in the heat conduction pipe, heat conduction liquid is injected between the heat conduction pipe and the rare earth doped optical fiber, flowing liquid is injected between the water guide pipe and the heat conduction pipe and used for taking away heat of the first end cap group and the heat conduction pipe, the rare earth doped optical fiber is enabled to dissipate heat uniformly, and the tension control device is used for straightening the rare earth doped optical fiber without introducing shearing force.
The input end and the output end of the rare earth doped rodlike optical fiber are respectively welded with the end caps in a welded mode, the tension control device is used for straightening the optical fiber without introducing shearing force, the optical fiber is wrapped by the heat conduction pipe, heat conduction liquid is filled between the heat conduction pipe and the optical fiber and is sealed, the water guide pipe wraps the two end caps and the optical fiber with the heat conduction pipe, flowing liquid is filled into the water guide pipe, heat of the end cap group and the heat conduction pipe is taken away, the rodlike rare earth doped optical fiber is guaranteed to be effectively and uniformly cooled, and stress is not introduced.
Further, the diameters of the first end cap and the second end cap are larger than the diameter of the rare earth doped optical fiber.
Furthermore, the rare earth-doped optical fiber is rod-shaped and is vertically arranged between the first end cap and the second end cap.
Further, the heat conduction pipe is a metal heat conduction pipe and is made of heat conduction metal or metal alloy.
Further, the metal heat conduction pipe is an aluminum heat conduction pipe or a copper heat conduction pipe.
Further, the heat conducting liquid is water, heat conducting glue or oil.
Furthermore, the packaging system also comprises a first sealing glue, and the heat conduction pipe is welded on the cross section of the end cap group through the first sealing glue.
Furthermore, the packaging system also comprises a second sealing glue, and the water guide pipe is welded on the inner side of the end cap group through the second sealing glue.
Further, the tension control device comprises an end cap fixing device set, a tension adjustable device, an X, Y-dimensional optical fiber observation device and a X, Y-dimensional adjusting device.
Furthermore, the end cap fixing device group is used for fixing the end cap group, the end cap fixing device group comprises a first end cap fixing device and a second end cap fixing device, the first end cap fixing device is used for fixing the first end cap, the second end cap fixing device is used for fixing the second end cap, the tension adjustable device is used for straightening the optical fiber without damaging the end cap group and the optical fiber fusion point, the X, Y-dimensional observation device is used for judging the deviation of the optical fiber in X, Y dimensions, and the X, Y-dimensional adjusting device is used for adjusting the displacement of the optical fiber in X, Y dimensions.
The technical scheme provided by the invention has the beneficial effects that:
1) the rare earth doped optical fiber is convenient to mount, dismount and transport;
2) the end cap is not easy to fall off due to shearing force;
3) the end cap and the optical fiber have no difference in heat dissipation, the optical fiber is more uniform in heat dissipation, the problem of end cap tilting is avoided, and the shearing force of the end cap is greatly reduced;
4) 360-degree heat dissipation without dead corners is greatly improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a block diagram of a packaging system for a rod-shaped rare-earth doped optical fiber according to an embodiment of the present invention.
Figure 2 is a schematic cross-sectional detail view of a metallic heat conducting tube in an embodiment of the invention.
Fig. 3 is a schematic cross-sectional view showing a water guide duct according to an embodiment of the present invention.
Fig. 4 is a detailed schematic view of a water guide duct in an embodiment of the present invention.
In the figure, 1-rare earth doped optical fiber, 2-first end cap, 3-second end cap, 4-metal heat conducting pipe, 5-first sealant, 6-heat conducting liquid, 7-aqueduct, 8-second sealant, 9-liquid, 10-water inlet, 11-water outlet, 120-tension adjustable device, 121-first end cap fixing device, 122-second end cap fixing device, 123-X dimension adjusting device, 124-Y dimension adjusting device, 125-X dimension optical fiber observing device and 126-Y dimension optical fiber observing device.
Detailed Description
For a more clear understanding of the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
The embodiment of the invention provides a packaging system of a rod-shaped rare earth-doped optical fiber.
Referring to fig. 1, fig. 1 is a structural diagram of a rod-shaped rare earth-doped optical fiber package system according to an embodiment of the present invention, and embodiment 1 of the present invention provides a rod-shaped rare earth-doped optical fiber package system, which includes a rod-shaped rare earth-doped optical fiber 1, an end cap set including a first end cap 2 and a second end cap 3, a metal heat pipe 4, a water conduit 7, a tension control device including a first end cap fixing device set for fixing the end cap set, a tension adjustable device including a first end cap fixing device 121 and a second end cap fixing device 122, an X-dimension optical fiber observation device 125, a Y-dimension optical fiber observation device 126, an X-dimension adjustment device 123, and a Y-dimension adjustment device 124, the tension adjustable device being configured to straighten the optical fiber without damaging the end cap set and the fusion point of the optical fiber, and the X, Y-dimension observation device being configured to determine whether the optical fiber is in the X-dimension optical fiber, Y-dimension, the X, Y-dimension adjustment device is used to adjust the displacement of the fiber in X, Y-dimensions. The tension control device is used for straightening the rare earth-doped optical fiber without introducing shear force.
The metal heat conduction pipe 4 is positioned in the water guide pipe 7, the rod-shaped rare earth doped optical fiber 1 is positioned in the heat conduction pipe 7, two ends of the rod-shaped rare earth doped optical fiber 1 and the metal heat conduction pipe 4 are respectively connected with the inner side of the first end cap 2 and the inner side of the second end cap 3, two ends of the metal heat conduction pipe 4 are respectively connected with the first end cap 2 and the second end cap 3, parts of the first end cap 2 and the second end cap 3 are positioned in the metal heat conduction pipe 4, namely the rod-shaped rare earth doped optical fiber 1 is wrapped by the metal heat conduction pipe 4, heat conduction liquid 6 is filled between the metal heat conduction pipe 4 and the rod-shaped rare earth doped optical fiber 1 and is sealed, the water guide pipe 7 wraps the two end caps and the rod-shaped rare earth doped optical fiber 1 with the metal heat conduction pipe 4, liquid 9 is filled between the metal heat conduction pipe 4 and the water guide pipe 7, and the flowing liquid is filled between the water guide pipe 7 and the metal heat conduction pipe 4 and is used for taking away the heat of the end cap group and the metal heat conduction pipe 4, so that the rod-shaped rare earth doped optical fiber 1 can uniformly radiate heat, the rod-shaped rare earth doped optical fiber 1 is ensured to effectively and uniformly dissipate heat without introducing stress.
The rod-shaped rare earth-doped optical fiber 1 is vertically placed between the first end cap 2 and the second end cap 3, the first end cap 2 is fixed through the first end cap fixing device 121, the second end cap 3 is fixed through the second end cap fixing device 122, and the end cap fixing device group does not apply force and shear force in the direction of the cross section of the end cap group. Tension is provided only in the direction perpendicular to the cross-section of the end cap assembly to allow the optical fiber to sag naturally under the action of gravity. The optical fiber is observed whether the optical fiber is shifted in the X-dimension by the X-dimension optical fiber observing means 125, and the optical fiber is aligned by the X-dimension adjusting means 123. The optical fiber is aligned by the Y-dimension adjusting device 124 by observing whether the optical fiber is shifted in the Y-dimension by the Y-dimension optical fiber observing device 126. The X Y D optical fiber adjusting device does not fix the second end cap 3, so it will not damage the melting points of the rare-earth doped optical fiber 1 and the second end cap 3. After the fiber is aligned, a pulling force is provided by the pulling force adjustable device 120, such as: 0.3N, make the optic fibre straighten, this pulling force is adjustable, can adapt to different optic fibre and end cap fusion joining intensity. The rare earth doped optical fiber 1 enables the end cap and the melting point of the optical fiber not to be subjected to shearing force through a tension adjustable device.
The diameters of the first end cap 2 and the second end cap 3 are larger than the diameter of the rod-shaped rare earth doped optical fiber 1.
The metal heat conduction pipe 4 is made of heat conductive metal or metal alloy, and the metal heat conduction pipe is an aluminum heat conduction pipe or a copper heat conduction pipe.
The heat conducting liquid 6 is water, heat conducting glue or oil.
The metal heat conduction pipe 4 is welded on the cross section of the end cap group through a first sealant 5.
The water guide pipe 7 is welded on the inner side of the end cap group through a second sealant 8.
As shown in fig. 2, the metal heat pipe 4 is divided into two semicircular metal heat pipes, and wraps around the rod-shaped rare earth doped optical fiber 1, and the two semicircular metal heat pipes 4 are bonded into a circular metal heat pipe through a sealant 5. Fix the one end of circular metal heat pipe 4 on the cross section of end cap two 3 through sealed glue 5, leave the space between end cap 2 and the metal heat pipe 3, pour into heat-conducting liquid 6 into metal heat pipe 4, sealed glue 5 is sealed to the reuse, fixes the other end of metal heat pipe 4 on the cross section of end cap 2 simultaneously.
As shown in fig. 3, the water guiding pipe 7 is divided into two semicircular water guiding pipes which are wrapped around the first end cap 2 and the second end cap 3, the two semicircular water guiding pipes are bonded into a circular water guiding pipe through the second sealant 8, a gap is reserved between the water guiding pipe and the end cap, flowing liquid 9 can be injected to take away heat of the end cap, and the circular water guiding pipe 7 can be fixed on the first end cap 2 and the second end cap 3 through the second sealant 8.
As shown in fig. 4, the water guiding pipe 7 has an inlet 10 and an outlet 11 for flowing liquid 9, such as: the heat of end cap one 2, end cap two 3 and metal heat pipe 4 can be taken away to the pure water, guarantees that bar-shaped rare earth doping optical fiber 1 and end cap one 2, the effective even heat dissipation of end cap two 3 and does not introduce the stress.
The invention has the beneficial effects that:
1) the rare earth doped optical fiber is convenient to mount, dismount and transport;
2) the end cap is not easy to fall off due to shearing force;
3) the end cap and the optical fiber have no difference in heat dissipation, the optical fiber is more uniform in heat dissipation, the problem of end cap tilting is avoided, and the shearing force of the end cap is greatly reduced;
4) 360-degree heat dissipation without dead corners is greatly improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A packaging system of a rod-shaped rare earth-doped optical fiber is characterized in that: the packaging system includes: the device comprises rare earth doped optical fibers, an end cap group, a heat conduction pipe, heat conduction liquid, a water guide pipe, liquid and a tension control device, wherein the end cap group comprises a first end cap and a second end cap;
the heat conduction pipe is located in the water guide pipe, the rare earth doped optical fiber is located in the heat conduction pipe, two ends of the rare earth doped optical fiber and the heat conduction pipe are respectively connected with the inner side of the first end cap and the inner side of the second end cap, two ends of the heat conduction pipe are respectively connected with the first end cap and the second end cap, parts of the first end cap and the second end cap are located in the heat conduction pipe, heat conduction liquid is injected between the heat conduction pipe and the rare earth doped optical fiber, flowing liquid is injected between the water guide pipe and the heat conduction pipe and used for taking away heat of the first end cap group and the heat conduction pipe, the rare earth doped optical fiber is enabled to be uniformly radiated, and the tension control device is used for straightening the rare earth doped optical fiber without introducing shearing force.
2. The system of claim 1, wherein the rod-shaped rare-earth doped optical fiber package system comprises: the diameters of the first end cap and the second end cap are larger than the diameter of the rare earth doped optical fiber.
3. The system of claim 1, wherein the rod-shaped rare-earth doped optical fiber package system comprises: the rare earth doped optical fiber is rod-shaped and is vertically arranged between the first end cap and the second end cap.
4. The system of claim 1, wherein the rod-shaped rare-earth doped optical fiber package system comprises: the heat conduction pipe is a metal heat conduction pipe and is made of heat conduction metal or metal alloy.
5. The system for packaging a rod-shaped rare-earth doped optical fiber according to claim 4, wherein: the metal heat conduction pipe is an aluminum heat conduction pipe or a copper heat conduction pipe.
6. The system of claim 1, wherein the rod-shaped rare-earth doped optical fiber package system comprises: the heat-conducting liquid is water, heat-conducting glue or oil.
7. The system of claim 1, wherein the rod-shaped rare-earth doped optical fiber package system comprises: the packaging system further comprises a first sealing glue, and the heat conduction pipe is welded on the cross section of the end cap group through the first sealing glue.
8. The system of claim 1, wherein the rod-shaped rare-earth doped optical fiber package system comprises: the packaging system further comprises a second sealant, and the water guide pipe is welded on the inner side of the end cap group through the second sealant in a welding mode.
9. The system of claim 1, wherein the rod-shaped rare-earth doped optical fiber package system comprises: the tension control device comprises an end cap fixing device group, a tension adjustable device, an X, Y-dimensional optical fiber observation device and a X, Y-dimensional adjusting device.
10. The system of claim 9, wherein the rod-shaped rare-earth doped optical fiber package system comprises: the end cap fixing device set is used for fixing the end cap set, the end cap fixing device set comprises a first end cap fixing device and a second end cap fixing device, the first end cap fixing device is used for fixing a first end cap, the second end cap fixing device is used for fixing a second end cap, the tension-adjustable device is used for straightening the optical fiber and does not damage a fusion point of the end cap set and the optical fiber, the X, Y-dimensional observation device is used for judging the deviation of the optical fiber in X, Y dimensions, and the X, Y-dimensional adjusting device is used for adjusting the displacement of the optical fiber in X, Y dimensions.
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| CN202110632961.4A CN113363796B (en) | 2021-06-07 | 2021-06-07 | Packaging system of rod-shaped rare earth-doped optical fiber |
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| CN113690722A (en) * | 2021-10-25 | 2021-11-23 | 中国工程物理研究院激光聚变研究中心 | Liquid cooling device of high-power optical fiber device |
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