CN115933078A - Optical fiber coiling device - Google Patents

Abstract

The application discloses an optical fiber coiling device which is of a columnar structure; a plurality of circles of rectangular grooves are formed in the outer side of the cylindrical surface of the optical fiber coiling device; the rectangular groove is used for coiling the optical fiber, and by adopting the technical scheme, the problems that in the related art, the stability of the polarization maintaining performance of the polarization maintaining optical fiber is poor and the like are solved.

Description

Optical fiber coiling device

Technical Field

The application relates to the field of optical fibers, in particular to an optical fiber coiling device.

Background

The polarization maintaining fiber has enough stress added to the fiber core of common fiber to produce relatively high double refraction in the direction perpendicular to the fiber core, so as to realize its polarization maintaining performance. The polarization maintaining performance of the polarization maintaining fiber is easily affected by the attenuation of the fiber (such as poor roundness of the fiber core, poor roundness of the stress region of the fiber, and the like), the characteristics of the fiber material itself, and external factors (such as temperature fluctuation, mechanical disturbance, and the like).

In the prior art, when the influence of external factors such as temperature fluctuation, mechanical disturbance and the like on the polarization maintaining performance is reduced, the polarization maintaining optical fiber is often wound in a V-shaped groove in a planar runway, and in such a mode, because the contact between the polarization maintaining optical fiber and the groove is point contact, the polarization maintaining optical fiber may be unstably placed, and the polarization maintaining performance of the polarization maintaining optical fiber is influenced. Therefore, how to keep the polarization maintaining performance of the polarization maintaining fiber stable is a problem to be considered at present.

Aiming at the problems of poor stability of polarization maintaining performance of the polarization maintaining optical fiber and the like in the related art, no effective solution is provided.

Disclosure of Invention

The embodiment of the application provides an optical fiber coiling device to at least solve the problem that the stability of polarization maintaining performance of a polarization maintaining optical fiber is poor and the like in the related art.

According to an embodiment of the present application, there is provided an optical fiber winding device including: the optical fiber coiling device is of a columnar structure; a plurality of circles of rectangular grooves are formed in the outer side of the cylindrical surface of the optical fiber coiling device; the rectangular groove is used for coiling the optical fiber.

Optionally, the optical fiber includes a polarization maintaining optical fiber, and each groove surface of the rectangular groove is in contact with the polarization maintaining optical fiber.

Optionally, the diameter of the columnar structure is determined according to the size of a core and/or the size of a cladding of the optical fiber, and the optical fiber is wound on the columnar structure for filtering out multimode modes in the optical fiber.

Optionally, a plurality of circles of the rectangular grooves are engraved on the outer side of the cylindrical surface of the optical fiber coiling apparatus according to a target slope, where the target slope is used to control the transverse stress of the optical fiber to be less than or equal to a stress threshold.

Optionally, the optical fiber coiling apparatus further includes: a fiber table, an end cap, and an end cap cover, wherein,

the end cap is fixed on the optical fiber table, the end cap cover covers the end cap, the end cap is connected with the output end of the optical fiber, and the optical fiber table is fixed on the first end face of the columnar structure;

the end cap is used for releasing stray light generated in the optical fiber.

Optionally, an end cap groove is formed between the fiber stage and the end cap, the end cap groove being shaped to mate with the end cap, wherein,

the end cap groove is used for fixing the end cap.

Optionally, the end cap is made of a transparent material.

Optionally, the apparatus further comprises: a heat sink, wherein,

the second end face of the columnar structure is in contact with the heat dissipation device, and a liquid heat conduction medium is filled in a contact area of the heat dissipation device and the columnar structure.

Optionally, the heat conducting medium includes: heat dissipating silicone grease or heat dissipating silicone.

Optionally, a first heat dissipation channel is arranged in the heat dissipation device, a second heat dissipation channel is arranged in the cylinder body of the columnar structure, wherein,

the first heat dissipation channel is communicated with the second heat dissipation channel, and the second heat dissipation channel forms an n-shaped pipeline structure in the cylinder body of the columnar structure;

and the first heat dissipation channel and the second heat dissipation channel are both used for filling cooling liquid.

In the embodiment of the application, the optical fiber coiling device is of a columnar structure; a plurality of circles of rectangular grooves are formed in the outer side of the cylindrical surface of the optical fiber coiling device; the rectangle recess is used for coiling optic fibre, is provided with many circles of rectangle recesses in the optical fiber coiling device's of columnar structure cylinder outside promptly, through coiling optic fibre in the rectangle recess, can increase the area of contact of optic fibre and rectangle recess, and then increase the stability that optic fibre was placed, avoids leading to the reduction of optic fibre performance because the unstability that optic fibre was placed. By adopting the technical scheme, the problems that the polarization maintaining performance of the polarization maintaining optical fiber is poor in stability and the like in the related technology are solved, and the technical effect of improving the stability of the polarization maintaining performance of the polarization maintaining optical fiber is achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a block diagram showing a configuration of an optical fiber winding device provided in this embodiment;

FIG. 2 is a first schematic view of a fiber winding device according to an embodiment of the present application;

FIG. 3 is a second schematic diagram of an optical fiber winding device according to an embodiment of the present application;

FIG. 4 is a schematic view of a deployment of an optical fiber coiling device according to an embodiment of the present application;

FIG. 5 is a schematic illustration of an end cap groove according to an embodiment of the present application;

FIG. 6 is a schematic view of a second heat dissipation channel according to an embodiment of the present application;

fig. 7 is a schematic connection diagram of an optical fiber winding device according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In an embodiment of the present application, an optical fiber winding device is provided, and fig. 1 is a block diagram of a structure of the optical fiber winding device provided in this embodiment, as shown in fig. 1, the optical fiber winding device includes: the optical fiber coiling device 102 is of a columnar structure; a plurality of circles of rectangular grooves 102-2 are formed in the outer side 102-1 of the cylindrical surface of the optical fiber coiling device 102; the rectangular groove 102-2 is used to coil the optical fiber 104.

Through above-mentioned optical fiber coiling device, be provided with many circles of rectangle recess in the optical fiber coiling device's of columnar structure cylinder outside, through coiling optical fiber in the rectangle recess, can increase the area of contact of optic fibre and rectangle recess, and then increase the stability that optic fibre was placed, avoid because the unstability that optic fibre was placed and lead to the reduction of optic fibre performance. By adopting the technical scheme, the problems that the polarization maintaining performance of the polarization maintaining optical fiber is poor in stability and the like in the related technology are solved, and the technical effect of improving the stability of the polarization maintaining performance of the polarization maintaining optical fiber is achieved.

In one exemplary embodiment, the optical fiber comprises a polarization maintaining fiber, and each groove face of the rectangular groove is in contact with the polarization maintaining fiber.

Optionally, in this embodiment, the optical fiber coiling apparatus may be but not limited to be used for coiling a polarization-maintaining optical fiber, and by contacting each groove surface of the rectangular groove with the polarization-maintaining optical fiber, the contact area between the rectangular groove and the polarization-maintaining optical fiber may be increased, so that the polarization-maintaining optical fiber is stably fixed in the rectangular groove, and the reduction of the polarization-maintaining performance of the polarization-maintaining optical fiber due to unstable placement of the polarization-maintaining optical fiber is reduced.

In an exemplary embodiment, the diameter of the columnar structure is determined according to a core size, and/or a cladding size of the optical fiber wound on the columnar structure for filtering out multimode modes in the optical fiber.

Optionally, in this embodiment, the diameter of the columnar structure may be determined by comprehensively considering the core size of the optical fiber and/or the cladding size, so as to filter the multimode mode in the main amplification, thereby obtaining a "pure" fundamental mode beam output, improving the roundness of the light spot output by the laser, and greatly improving the quality of the light beam output by the laser.

In an exemplary embodiment, the fiber winding device is provided with a plurality of circles of rectangular grooves on the outer side of the cylindrical surface according to a target slope, wherein the target slope is used for controlling the transverse stress of the optical fiber to be less than or equal to a stress threshold.

Optionally, in this embodiment, by controlling the slope of the rectangular groove on the outer side of the cylindrical surface of the optical fiber coiling device, it may be achieved that the lateral stress applied to the polarization maintaining optical fiber is controlled within a suitable stress range, thereby achieving the stability of the polarization maintaining performance of the polarization maintaining optical fiber.

In one exemplary embodiment, the optical fiber winding device further includes: the optical fiber platform comprises an optical fiber platform, an end cap and an end cap cover, wherein the end cap is fixed on the optical fiber platform, the end cap cover covers the end cap, the end cap is connected with the output end of the optical fiber, and the optical fiber platform is fixed on the first end face of the columnar structure; the end cap is used for releasing stray light generated in the optical fiber.

Alternatively, in this embodiment, the end cap can be stably fixed on the optical fiber table by fixing the end cap connected to the output end of the optical fiber, so as to improve the stability of the fixing of the polarization maintaining optical fiber, fig. 2 is a schematic diagram of an optical fiber winding apparatus according to an embodiment of the present application, as shown in fig. 2, the end cap 202 is connected to the output end 204 of the optical fiber, the end cap 202 is fixed on the optical fiber table 206, the end cap cover 208 covers the end cap 202, and the optical fiber table 206 can be, but is not limited to, fixed on the first end face 102-3 of the columnar structure 102 by screws. Fig. 3 is a second schematic diagram of an optical fiber winding apparatus according to an embodiment of the present application, as shown in fig. 3, in such a manner that an end cap 202 is fixed on a fiber stage 206, an end cap 208 covers the end cap 202, and the fiber stage 206 is fixed on the first end surface 102-3 of the columnar structure 102, so that a stable mechanical strength can be ensured, and the influence of mechanical disturbance on the polarization maintaining performance of the polarization maintaining fiber is reduced.

Optionally, in this embodiment, after the optical fiber coiling device may be, but is not limited to be, deployed in an optical path structure for main amplification, fig. 4 is a schematic deployment diagram of an optical fiber coiling device according to an embodiment of the present application, as shown in fig. 4, seed light emitted by a narrow-linewidth seed source may be, but is not limited to, passed through a primary pre-amplifier, a secondary pre-amplifier, and a tertiary main amplifier to obtain fundamental frequency light with a required power. The optical fiber coiling device can be deployed at a position behind the three-stage main amplifier, the optical fiber is coiled on the optical fiber coiling device, and the output end cap is fixed on the optical fiber table, so that the stability of deploying the polarization-maintaining optical fiber is improved. In addition, the optical fiber is wound on the optical fiber winding device, so that the active optical fiber in main amplification is relatively independent, and the maintenance cost of the laser is reduced.

In an exemplary embodiment, an end cap groove is formed between the fiber stage and the end cap cover, the end cap groove being shaped to match the end cap, wherein the end cap groove is used to secure the end cap.

Alternatively, in this embodiment, FIG. 5 is a schematic diagram of an end cap groove according to an embodiment of the present application, as shown in FIG. 5, the sectional view taken from the top view of the optical fiber stage 206 as section A1-A1 can be, but not limited to, a cross-section A1-A1, the end cap groove 210 on the optical fiber stage 206 can include a straight structure 210-1 and a step structure 210-2, the end cap groove and the end cap cover are slightly larger than the end cap to ensure the end cap can work safely in the end cap groove without being crushed by the end cap cover and the end cap groove, and at the same time, to leave a space for the glue fixed on the end cap, the glue with less volatility and small expansion coefficient should be used for the end cap, in such a way, the fusion point between the end cap and the optical fiber can be sufficiently protected, and the beam output stability of the laser can be greatly improved.

In one exemplary embodiment, the end cap is a transparent material.

Optionally, in this embodiment, the end cap may be, but is not limited to, made of a transparent material, and may release stray light emitted from the end cap, so as to avoid an excessive temperature of the optical fiber stage, which may further affect the polarization maintaining performance of the polarization maintaining optical fiber.

In one exemplary embodiment, the apparatus further comprises: and the second end face of the columnar structure is in contact with the heat dissipation device, and a liquid heat conduction medium is filled in a contact area of the heat dissipation device and the columnar structure.

Optionally, in this embodiment, the second end face of the columnar structure may be, but is not limited to be, connected to the heat dissipation device through a screw, so as to ensure stable contact between the optical fiber coiling device and the heat dissipation device; and the liquid heat-conducting medium is filled in the contact area between the heat dissipation device and the columnar structure, so that the heat generated by the optical fiber coiled on the optical fiber coiling device can be timely transmitted to the heat dissipation device for heat dissipation, and the influence of overhigh temperature of the optical fiber on the polarization maintaining performance of the polarization maintaining optical fiber is avoided.

In one exemplary embodiment, the heat transfer medium includes: heat dissipating silicone grease or heat dissipating silicone.

In an exemplary embodiment, a first heat dissipation channel is arranged in the heat dissipation device, and a second heat dissipation channel is arranged in the cylinder of the columnar structure, wherein the first heat dissipation channel is communicated with the second heat dissipation channel, and the second heat dissipation channel forms an n-shaped pipeline structure in the cylinder of the columnar structure; and the first heat dissipation channel and the second heat dissipation channel are both used for filling cooling liquid.

Optionally, in this embodiment, the first heat dissipation channel disposed in the heat dissipation device may be, but is not limited to, communicated with the second heat dissipation channel disposed in the cylinder of the columnar structure, and the first end face of the columnar structure is sealed by friction welding, so that the second heat dissipation channel does not penetrate through the columnar structure at the first end face. The cooling liquid filled in the first heat dissipation channel and the second heat dissipation channel can be used for taking away heat generated by the polarization maintaining optical fiber in time, so that heat balance is rapidly achieved and maintained, the influence of temperature rise on the polarization maintaining performance of the optical fiber is greatly reduced, and the stability of the polarization maintaining performance of the optical fiber is improved.

Alternatively, in this embodiment, the second heat dissipation channel may be, but is not limited to, an n-shaped pipe structure formed in the cylinder of the columnar structure, and fig. 6 is a schematic diagram of a second heat dissipation channel according to an embodiment of the present application, as shown in fig. 6, the fiber winding device 602 of the columnar structure may be, but is not limited to, provided with the heat dissipation channel 602-1 and the heat dissipation channel 602-2 of the n-shaped pipe structure, and the fiber winding device 602 of the columnar structure may be, but is not limited to, cut from the first end face 602-3 of the fiber winding device 602 of the columnar structure according to a section A2-A2 and a section B-B, so as to obtain a section view of a section A2-A2 and a section B-B, where the heat dissipation channel 602-1 and the heat dissipation channel 602-2 of the n-shaped pipe structure are shown in the section view of the section A2-A2 and the section B-B.

It should be noted that, in fig. 6, the cylinder of the columnar structure is explained only with the second heat dissipation channels forming two n-shaped pipe structures in the cylinder of the columnar structure, and in fact, the number of the second heat dissipation channels of the n-shaped pipe structures in the cylinder of the columnar structure may be, but is not limited to, 1, 2, 5, etc., and the application does not limit the number of the second heat dissipation channels.

Optionally, in this embodiment, for the high power fiber laser, the active fiber heats up severely, and the temperature of the fusion point is higher. The welding point between the active polarization maintaining fiber and the passive polarization maintaining fiber which are mainly amplified by the laser can be coiled on the cylinder body of the columnar structure, and meanwhile, the other welding point can be placed in a straight groove (namely the end cap groove) of the optical fiber platform, which is close to the columnar structure, so that the requirement of timely heat dissipation can be met.

Optionally, in this embodiment, for a laser with a low average power but a high peak power of output laser (which has a great requirement on the length of the main amplified optical fiber, the longer the optical fiber, the lower the power that can be output by the laser, and the heat generated by the active optical fiber is related to the average power), the optical fiber is wound on the cylindrical body with a cylindrical structure, so that the requirement of the 213nm deep ultraviolet laser on the fundamental frequency can be met, and the fundamental frequency light can output the 213nm deep ultraviolet laser with a high power after passing through the two, three and five times frequency crystal. In addition, the high-power laser can output near-kilowatt stable linear polarization fundamental frequency light by winding the optical fiber on the cylindrical barrel body with the cylindrical structure, and the fundamental frequency light can obtain hundreds of watts of green light output after passing through the frequency doubling crystal.

In order to better understand the structure and connection manner of the optical fiber coiling device, the structure and connection manner of the optical fiber coiling device are explained below with reference to alternative embodiments, which may be applied to the embodiments of the present application without limitation.

FIG. 7 is a schematic diagram of a fiber winding device according to an embodiment of the present disclosure, as shown in FIG. 7, an end cap 702 is connected to an output end 704 of an optical fiber, the end cap 702 is fixed to a fiber stage 706, an end cap 708 covers the end cap 702, the fiber stage 706 is fixed to a first end 710-1 of a cylindrical barrel 710, a second end 710-2 of the cylindrical barrel may be, but is not limited to, in contact with a heat sink 712, and a first heat sink channel 712-1 may be, but is not limited to, disposed in the heat sink 712.

It should be noted that, in fig. 7, only the liquid inlet and the liquid outlet of the first heat dissipation channel are illustrated on the same side of the heat dissipation device, in fact, the liquid inlet and the liquid outlet of the first heat dissipation channel may be, but are not limited to, distributed on the same side or different sides of the heat dissipation device and any position that meets the actual heat dissipation requirement, and the present application does not limit this.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present application described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present application is not limited to any specific combination of hardware and software.

The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims (10)

1. An optical fiber winding device, comprising:

the optical fiber coiling device is of a columnar structure;

a plurality of circles of rectangular grooves are formed in the outer side of the cylindrical surface of the optical fiber coiling device;

the rectangular groove is used for coiling the optical fiber.

2. The apparatus of claim 1, wherein the optical fiber comprises a polarization maintaining fiber, each groove face of the rectangular groove being in contact with the polarization maintaining fiber.

3. The apparatus of claim 1, wherein the diameter of the columnar structure is determined based on a core size, and/or a cladding size of the optical fiber wound around the columnar structure for filtering multimode modes in the optical fiber.

4. The device of claim 1, wherein the fiber winding device is engraved with a plurality of turns of the rectangular groove outside the cylinder at a target slope, wherein the target slope is used to control the transverse stress of the fiber to be less than or equal to a stress threshold.

5. The apparatus of claim 1, wherein the fiber winding apparatus further comprises: a fiber table, an end cap, and an end cap cover, wherein,

the end cap is fixed on the optical fiber table, the end cap covers the end cap, the end cap is connected with the output end of the optical fiber, and the optical fiber table is fixed on the first end face of the columnar structure;

the end cap is used for releasing stray light generated in the optical fiber.

6. The apparatus of claim 5, wherein an end cap groove is formed between the fiber stage and the end cap, the end cap groove being shaped to mate with the end cap, wherein,

the end cap groove is used for fixing the end cap.

7. The apparatus of claim 5, wherein the end cap is a transparent material.

8. The apparatus of claim 1, further comprising: and the second end face of the columnar structure is in contact with the heat dissipation device, and a liquid heat conduction medium is filled in a contact area of the heat dissipation device and the columnar structure.

9. The apparatus of claim 8, wherein the heat transfer medium comprises: heat dissipating silicone grease or heat dissipating silicone rubber.

10. The device of claim 8, wherein a first heat dissipation channel is disposed in the heat dissipation device, a second heat dissipation channel is disposed in the cylinder of the columnar structure, wherein,

the first heat dissipation channel is communicated with the second heat dissipation channel, and the second heat dissipation channel forms an n-shaped pipeline structure in the cylinder body of the columnar structure;

and the first heat dissipation channel and the second heat dissipation channel are both used for filling cooling liquid.

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