CN213302572U - Mid-infrared optical fiber laser pumping beam combiner - Google Patents
Mid-infrared optical fiber laser pumping beam combiner Download PDFInfo
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- CN213302572U CN213302572U CN202021759401.2U CN202021759401U CN213302572U CN 213302572 U CN213302572 U CN 213302572U CN 202021759401 U CN202021759401 U CN 202021759401U CN 213302572 U CN213302572 U CN 213302572U
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Abstract
The utility model discloses a well infrared optical fiber laser pumping closes bundle ware, should close and to restraint the ware and include: the base box is made of a material with high transmittance and high thermal conductivity in a middle infrared band; input fiber, wear to locate the one end of base box, input fiber includes: the optical fiber comprises a signal optical fiber and at least two pumping optical fibers, wherein the input optical fiber is a fluoride optical fiber; and the active tail fiber penetrates through the other end of the base box, and the active tail fiber and the input optical fiber are welded inside the base box. The utility model discloses a well infrared band high thermal conductivity, the base box of high transmissivity and the input fiber of fluoride optic fibre, fluoride optic fibre have possessed good infrared transmissivity, combine the radiating effect of base box, and the effectual signal optic fibre and the pumping optic fibre that has realized the centering infrared optic fibre laser close the bundle.
Description
Technical Field
The utility model belongs to the technical field of the optical fiber coupling, concretely relates to mid-infrared optic fibre laser pumping beam combiner.
Background
The optical fiber beam combiner is an optical fiber device prepared on the basis of a fused biconical taper optical fiber beam. The method is that a bundle of optical fibers is stripped of a coating layer and then arranged together in a certain mode, the optical fibers are heated at high temperature to be melted, meanwhile, the optical fiber bundle is stretched towards the opposite direction, and an optical fiber heating area is melted to form a fused-cone optical fiber bundle. With the development of industrial applications such as laser processing, the output power of a single fiber laser cannot meet the increasing urgent needs. The high-power optical fiber beam combiner can geometrically splice a plurality of beams of high-power optical fiber lasers into one beam, thereby improving the total output power. In 1988, Snitzer et al proposed a cladding pumping technique based on double-clad fiber, which is based on the principle that high-power multimode pump light is converted into high-power single-mode laser by transmission in a cladding through multimode fiber and absorption, conversion and amplification through rare-earth-doped active fiber. Therefore, the coupling difficulty of the pump light is reduced, and the coupling power of the pump light is greatly improved.
Although the use requirement of the mid-infrared band fiber laser beam combiner is very urgent, the mid-infrared band pump beam combiner in the market is not reported yet. The reason is mainly that the preparation of the mid-infrared pump beam combiner has the following difficulties: 1. most of optical fiber tapering equipment in the market is designed for quartz optical fibers, the quartz optical fibers have strong absorption peaks near 2.7 micrometers, and the quartz optical fibers cannot be used in a wave band of 3.0-5.0 micrometers. The difference between the melting point of fluoride and quartz is large, so that tapering and welding of the fluoride optical fiber are relatively difficult. 2. The coupling efficiency of the cone region cannot reach 100%, stray light is inevitably generated, the mid-infrared laser pumping beam combiner is arranged in the cone region under the high power condition, and the heat effect of the coating region is very obvious. Particularly, the traditional packaging box is generally made of metal materials or quartz boxes and the like. Because the packaging box can not transmit the stray light of the middle infrared band, the stray light is absorbed again by the packaging box to form a large amount of heat accumulation. The temperature of the beam combiner is sharply increased, and the stability and reliability are greatly reduced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a mid-infrared fiber laser pumping beam combiner.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
in one aspect, the utility model discloses a mid-infrared fiber laser pumping beam combiner, include:
the base box is a sapphire crystal box or a zinc sulfide transparent ceramic box or an yttrium oxide transparent ceramic box;
input fiber, wear to locate the one end of base box, input fiber includes: the optical fiber comprises a signal optical fiber and at least two pumping optical fibers, wherein the input optical fiber is a fluoride optical fiber;
and the active tail fiber penetrates through the other end of the base box, and the active tail fiber and the input optical fiber are welded inside the base box.
The utility model provides a well infrared optical fiber laser pumping closes and restraints ware adopts the base box of well infrared wave band high thermal conductivity, high transmissivity and the input fiber of fluoride optic fibre, and fluoride optic fibre has possessed good infrared transmissivity, combines the radiating effect of base box, and the effectual signal optic fibre and the pumping optic fibre that has realized the centering infrared optical fiber laser close and restraint.
On the basis of the technical scheme, the following improvements can be made:
as preferred scheme, base box internally mounted has the sapphire radiating block, and the input of input fiber is fixed in the one end of sapphire radiating block through the optical cement, and the output of active tail optical fiber is fixed in the other end of sapphire radiating block through the optical cement.
Adopt above-mentioned preferred scheme, the both ends of optic fibre are fixed in sapphire radiating block both ends respectively, improve the radiating effect.
As the preferred scheme, at least one packaging clamp used for clamping the base box is sleeved on the outer wall of the base box, and radiating fins distributed in an array mode are arranged on the outer wall of the packaging clamp.
Adopt above-mentioned preferred scheme, the encapsulation anchor clamps press from both sides tightly the base box, and the fin can improve the radiating effect of bunching device.
Preferably, the packaging jig includes: the packaging structure comprises an upper packaging half part and a lower packaging half part, wherein the upper packaging half part and the lower packaging half part are fixedly connected through a fixing piece.
Adopt above-mentioned preferred scheme, the installation of encapsulation anchor clamps is more convenient.
Preferably, the heat sink is disposed on an outer sidewall of the package clamp.
By adopting the preferable scheme, the heat dissipation effect is better.
Preferably, the mounting location of the encapsulation fixture is remote from the tapered region and the optical cement coated region of the input optical fiber.
By adopting the preferable scheme, the mounting position of the packaging clamp is designed in the area far away from the cone area and the coating area, so that the stray light of the cone area and the coating area can escape out of the beam combiner through the base box, the phenomenon that the stray light is absorbed again to cause remarkable temperature rise of the beam combiner is avoided, the heat dissipation effect of the beam combiner is greatly improved, and the optical fiber bearing power is further greatly improved.
Preferably, the base cassette comprises: a U-shaped heat dissipation substrate box and a substrate box cover plate used for being arranged at the opening of the heat dissipation substrate box.
With the above preferred arrangement, the base cartridge comprises: u type heat dissipation basement box and basement box apron, the split type structure of basement box for optic fibre's installation is more convenient. The heat dissipation substrate box and the substrate box cover plate can be made of the same material or different materials.
On the other hand, the utility model also provides a mid-infrared fiber laser pumping beam combiner preparation method, includes following steps:
preparing a base box, wherein the base box is made of a material with high transmittance and high thermal conductivity in a middle infrared band;
performing fiber fusion tapering treatment, wherein an input fiber is a signal fiber and at least two pumping fibers, the input fiber is fused and tapered by a fiber tapering machine and then is welded with an active tail fiber, and the signal fiber and the pumping fibers are fluoride fibers;
and installing optical fibers, wherein the input optical fibers penetrate through the input end of the base box, and the active tail optical fibers penetrate through the output end of the base box.
The utility model discloses a well infrared optic fibre laser pumping closes beam ware preparation method adopts the input fiber of the base box of infrared band high thermal conductivity, high transmittance and fluoride optic fibre in, and fluoride optic fibre has possessed good infrared transmittance, combines the radiating effect of base box, and the effectual signal optic fibre and the pumping optic fibre that has realized centering infrared optic fibre laser close the beam.
Preferably, before the step of installing the optical fiber, the method further comprises the following steps:
preparing a sapphire radiating block, and respectively fixing an input optical fiber and an active tail fiber at two ends of the surface of the sapphire radiating block through optical cement;
then, the "installation fiber" is: the sapphire radiating block fixed with the input optical fiber and the active tail fiber is arranged in the base box, the input optical fiber penetrates through the input end of the base box, and the active tail fiber penetrates through the output end of the base box.
By adopting the preferable scheme, the radiating effect of the beam combiner is improved by the additionally arranged sapphire radiating block.
Preferably, after the installation of the 'installation optical fiber', the method further comprises the following steps:
and installing an encapsulation clamp, wherein the encapsulation clamp is installed on the outer wall of the base box and is installed in a taper area far away from the input optical fiber and a coating area of the optical cement.
Adopt above-mentioned preferred scheme, the encapsulation anchor clamps press from both sides tightly the base box.
In the preferable scheme, in the optical fiber fusion tapering process, the tapering process realizes tapering fusion of the input optical fiber by gradually reducing the power of the optical fiber tapering machine.
By adopting the preferable scheme, the melting point of the quartz optical fiber is higher than that of the fluoride optical fiber, and the tapering fusion of the fluoride optical fiber is realized by gradually reducing the power of the optical fiber tapering machine in the tapering process.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a mid-infrared fiber laser pumping beam combiner provided in an embodiment of the present invention.
Fig. 2 is a cross-sectional view of a mid-infrared fiber laser pumping beam combiner provided in an embodiment of the present invention.
Fig. 3 is a front view of a mid-infrared fiber laser pumping beam combiner according to an embodiment of the present invention.
Wherein: 1-base box, 11-radiating base box, 12-base box cover plate, 2-input optical fiber, 21-signal optical fiber, 22-pumping optical fiber, 3-active tail fiber, 4-sapphire radiating block, 5-packaging fixture, 51-packaging upper half, 52-packaging lower half, 53-radiating fin, 6-cone region and 7-optical cement coating region.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-3, the embodiment of the utility model discloses a mid-infrared fiber laser pumping beam combiner, include:
the base box 1, the base box 1 is made of material with high transmittance and high thermal conductivity in the middle infrared band;
and the active tail fiber 3 penetrates through the other end of the base box 1, and the active tail fiber 3 and the input optical fiber 2 are welded inside the base box 1.
The utility model provides a well infrared optical fiber laser pumping closes and restraints ware adopts the input fiber 2 of base box 1 and fluoride optic fibre of well infrared wave band high thermal conductivity, high transmissivity, and fluoride optic fibre has possessed good infrared transmissivity, combines the radiating effect of base box 1, and the effectual signal optic fibre 21 and the pumping optic fibre 22 that has realized the centering infrared optical fiber laser close and restraint.
In order to further optimize the effect of the present invention, in other embodiments, the rest of the features are the same, except that the base case 1 is a sapphire crystal case or a zinc sulfide transparent ceramic case or a yttrium oxide transparent ceramic case.
By adopting the preferable scheme, the base box 1 can be made of materials with high transmittance and high thermal conductivity in the middle infrared band, such as sapphire, zinc sulfide, yttrium oxide and the like.
In order to optimize the utility model discloses an implement the effect further, in some other embodiments, all the other characteristic techniques are the same, and the difference lies in, and base box 1 internally mounted has sapphire radiating block 4, and input optical fiber 2's input is fixed in the one end of sapphire radiating block 4 through the optical cement, and the output of active tail optical fiber 3 is fixed in the other end of sapphire radiating block 4 through the optical cement.
By adopting the preferable scheme, the two ends of the optical fiber are respectively fixed at the two ends of the sapphire radiating block 4, so that the radiating effect is improved.
In order to further optimize the utility model discloses an implement the effect, in some other embodiments, all the other characteristic techniques are the same, and the difference lies in, establishes at base box 1 outer wall cover and installs two encapsulation anchor clamps 5 that are used for pressing from both sides tight base box 1, is equipped with the fin 53 that the array distributes on the encapsulation anchor clamps 5 outer wall.
Adopt above-mentioned preferred scheme, encapsulation anchor clamps 5 press from both sides tightly base box 1, and the fin can improve the radiating effect of beam combiner.
The package clamp 5 may be, but is not limited to, made of a metal material.
The encapsulating jig 5 may be of a split type structure and an integrated type structure, and when it is of a split type structure, the encapsulating jig 5 includes: the package upper half part 51 and the package lower half part 52 are fixed by a fixing member, and the package upper half part 51 and the package lower half part 52 are fixed by a fixing member.
The heat sink may be, but is not limited to being, provided on an outer sidewall of the package clamp 5.
Further, the encapsulation fixture 5 is mounted away from the tapered section 6 and the optical cement coated section 7 of the input optical fiber 2.
By adopting the preferable scheme, the installation position of the packaging clamp 5 is designed in the area far away from the cone area 6 and the coating area, so that the stray light of the cone area 6 and the coating area can escape out of the beam combiner through the base box 1, the phenomenon that the stray light is re-absorbed to cause remarkable temperature rise of the beam combiner is avoided, the heat dissipation effect of the beam combiner is greatly improved, and the optical fiber bearing power is further greatly improved.
In order to further optimize the effect of the present invention, in other embodiments, the rest of the features are the same, except that the base box 1 includes: a U-shaped heat-dissipating substrate cassette 11, and a substrate cassette cover plate 12 for mounting at an opening of the heat-dissipating substrate cassette 11.
With the above preferred arrangement, the base cartridge 1 includes: u type heat dissipation substrate box 11 and substrate box apron 12, base box 1 is split type structure for the installation of optic fibre is more convenient. The heat dissipation substrate cassette 11 and the substrate cassette cover plate 12 may be made of the same material or different materials.
On the other hand, the utility model also provides a mid-infrared fiber laser pumping beam combiner preparation method, includes following steps:
preparing a base box 1, wherein the base box 1 is made of a material with high transmittance and high thermal conductivity in a middle infrared band;
performing fiber fusion tapering treatment, wherein the input fiber 2 is a signal fiber 21 and at least two pump fibers 22, the input fiber 2 is fused and tapered by a fiber tapering machine and then is welded with the active tail fiber 3, and the signal fiber 21 and the pump fibers 22 are fluoride fibers;
and installing optical fibers, wherein the input optical fibers 2 penetrate through the input end of the base box 1, and the active tail optical fibers 3 penetrate through the output end of the base box 1.
The utility model discloses a well infrared optical fiber laser pumping closes beam ware preparation method adopts the base box 1 and the fluoride optic fibre of well infrared wave band high thermal conductivity, high transmissivity, and the fluoride optic fibre has possessed good infrared transmissivity, combines the radiating effect of base box 1, and the effectual signal optic fibre 21 and the pumping optic fibre 22 that has realized the centering infrared optical fiber laser close the beam. After the base cartridge 1 is prepared, the base cartridge 1 is subjected to a polishing process.
In order to further optimize the implementation effect of the present invention, in other embodiments, the rest of the feature technologies are the same, except that before "installing the optical fiber", the following steps are further included:
preparing a sapphire radiating block 4, and respectively fixing an input optical fiber 2 and an active tail fiber 3 at two ends of the surface of the sapphire radiating block 4 through optical cement;
then, the "installation fiber" is: the sapphire radiating block 4 fixed with the input optical fiber 2 and the active tail fiber 3 is arranged in the base box 1, the input optical fiber 2 penetrates through the input end of the base box 1, and the active tail fiber 3 penetrates through the output end of the base box 1.
By adopting the preferable scheme, the radiating effect of the beam combiner is improved by the additionally arranged sapphire radiating block 4. Before the sapphire heat dissipation block 4 is mounted, the sapphire heat dissipation block 4 needs to be polished.
In order to further optimize the implementation effect of the present invention, in other embodiments, the rest of the feature technologies are the same, except that after the installation of the "installation optical fiber", the following steps are further included:
and installing an encapsulation clamp 5, installing the encapsulation clamp 5 on the outer wall of the base box 1, and installing the encapsulation clamp on a taper area 6 far away from the input optical fiber 2 and a coating area 7 of the optical cement.
With the above preferred arrangement, the base cartridge 1 is clamped by the enclosure clamp 5.
In order to further optimize the implementation effect of the present invention, in other embodiments, the rest of feature technologies are the same, and the difference is that in the "optical fiber fusion tapering process", the tapering process realizes the tapering fusion to the input optical fiber 2 by gradually reducing the power of the optical fiber tapering machine.
By adopting the preferable scheme, the melting point of the quartz optical fiber is higher than that of the fluoride optical fiber, and the tapering fusion of the fluoride optical fiber is realized by gradually reducing the power of the optical fiber tapering machine in the tapering process.
The utility model discloses specifically disclose following embodiment:
example 1 was carried out:
the process for preparing the high-power mid-infrared fiber laser pumping beam combiner packaged by the yttrium oxide transparent ceramic base box comprises the following steps:
1) the method comprises the steps of preparing a base box 1 by adopting transparent yttria ceramics as a base material, processing the base box 1 into a heat dissipation base box 11 and a base box cover plate 12 through wire cutting, cleaning and polishing.
2) And (5) processing the metal packaging clamp 5, namely, processing the red copper into the metal packaging clamp 5, and forming a hole and tapping on the top of the packaging clamp 5.
3) And (3) performing taper welding on the fluoride optical fiber, adjusting the power of the optical fiber taper machine, tapering the pumping optical fiber 22 and the signal optical fiber 21, welding the tapered pumping optical fiber 22 and the active tail fiber 3, and fixing the tapered pumping optical fiber and the active tail fiber on the surface of the sapphire heat dissipation block 4.
4) The sapphire heat dissipation block 4 fixed with the pump optical fiber 22, the signal optical fiber 21 and the active tail fiber 3 is placed in the heat dissipation substrate box 11, covered with the substrate box cover plate 12, placed in the packaging fixture 5, and screwed and fixed through screws on the packaging fixture 5.
5) And (3) testing the mid-infrared high power: and testing the power of the mid-infrared laser, and measuring the surface temperature of the beam combiner.
Example 2 was carried out: the process for preparing the high-power intermediate infrared fiber laser beam combiner packaged by the sapphire crystal base box comprises the following steps:
1) sapphire crystals are used as a base material, a base box 1 is prepared, the base box 1 is processed into a heat dissipation base box 11 and a base box cover plate 12 through wire cutting, and polishing treatment is carried out after cleaning.
2) And (5) processing the metal packaging clamp 5, namely, processing the red copper into the metal packaging clamp 5, and forming a hole and tapping on the top of the packaging clamp 5.
3) And (3) performing taper welding on the fluoride optical fiber, adjusting the power of the optical fiber taper machine, tapering the pumping optical fiber 22 and the signal optical fiber 21, welding the tapered pumping optical fiber 22 and the active tail fiber 3, and fixing the tapered pumping optical fiber and the active tail fiber on the surface of the sapphire heat dissipation block 4.
4) The sapphire heat dissipation block 4 fixed with the pump optical fiber 22, the signal optical fiber 21 and the active tail fiber 3 is placed in the heat dissipation substrate box 11, covered with the substrate box cover plate 12, placed in the packaging fixture 5, and screwed and fixed through screws on the packaging fixture 5.
5) And (3) testing the mid-infrared high power: and testing the power of the mid-infrared laser, and measuring the surface temperature of the beam combiner.
The utility model relates to a beneficial effect of well infrared optic fibre laser pumping beam combiner as follows:
firstly, the heat dissipation effect is greatly improved: both the pump fiber 22 and the signal fiber 21 adopt fluoride fibers, and no absorption peak exists in the middle infrared band. The heat effect of the cone region 6 of the input optical fiber 2 and the optical cement coating region 7 is most obvious, and because the base box 1 is made of a material with high transmittance in a middle infrared band, stray light of the cone region 6 of the input optical fiber 2 and the optical cement coating region 7 can be transmitted out and cannot be secondarily absorbed. Meanwhile, the base box 1 has high heat conductivity, the packaging clamp 5 has a radiating fin structure, and the radiating effect is greatly improved compared with that of the traditional packaging box.
Secondly, stability and reliability are effectively improved: the base box 1 is prepared from crystal or transparent ceramic materials, can resist high temperature and has stable physicochemical properties at high temperature; the thermal expansion coefficient of the material is much smaller than that of metal, and the stability and reliability at a high-temperature stage are obviously improved.
The above embodiments are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.
Claims (7)
1. A mid-infrared fiber laser pumping beam combiner, comprising:
the base box is a sapphire crystal box or a zinc sulfide transparent ceramic box or an yttrium oxide transparent ceramic box;
an input fiber disposed through one end of the base housing, the input fiber comprising: the optical fiber comprises a signal optical fiber and at least two pumping optical fibers, wherein the input optical fiber is a fluoride optical fiber;
and the active tail fiber penetrates through the other end of the base box, and the active tail fiber and the input optical fiber are welded inside the base box.
2. The mid-infrared fiber laser pump beam combiner of claim 1, wherein a sapphire heat dissipation block is installed inside the base box, the input end of the input fiber is fixed to one end of the sapphire heat dissipation block through optical cement, and the output end of the active pigtail is fixed to the other end of the sapphire heat dissipation block through optical cement.
3. The mid-infrared fiber laser pumping beam combiner of claim 2, wherein at least one packaging fixture for clamping the base box is installed on an outer wall of the base box in a sleeved manner, and cooling fins distributed in an array manner are installed on an outer wall of the packaging fixture.
4. The mid-infrared fiber laser pumped beam combiner of claim 3, wherein the packaging fixture comprises: the packaging structure comprises an upper packaging half part and a lower packaging half part, wherein the upper packaging half part and the lower packaging half part are fixedly connected through a fixing piece.
5. The mid-infrared fiber laser pump beam combiner of claim 3, wherein the heat sink is disposed on an outer sidewall of the package clamp.
6. The mid-infrared fiber laser pump beam combiner of claim 3, wherein the package clamp mounting location is remote from the tapered region and the optical cement coated region of the input fiber.
7. The mid-infrared fiber laser pumped beam combiner of any one of claims 1-6, wherein the base-box comprises: the heat dissipation substrate box comprises a U-shaped heat dissipation substrate box and a substrate box cover plate used for being installed at an opening of the heat dissipation substrate box.
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| CN202021759401.2U CN213302572U (en) | 2020-08-20 | 2020-08-20 | Mid-infrared optical fiber laser pumping beam combiner |
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| CN202021759401.2U CN213302572U (en) | 2020-08-20 | 2020-08-20 | Mid-infrared optical fiber laser pumping beam combiner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397733A (en) * | 2021-12-21 | 2022-04-26 | 上海昊量光电设备有限公司 | High-power fluoride optical fiber jumper wire and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397733A (en) * | 2021-12-21 | 2022-04-26 | 上海昊量光电设备有限公司 | High-power fluoride optical fiber jumper wire and manufacturing method thereof |
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