Multi-layer frameless optical fiber ring and production method thereof

Abstract

The invention belongs to the technical field of frameless optical fiber rings, and relates to a multi-layer frameless optical fiber ring and a production method thereof, and the method comprises the following specific steps: S10, designing the number of layers of the multi-layer frameless optical fiber ring; s20, the multiple layers of frameless optical fiber rings are split into a first split optical fiber ring, a second split optical fiber ring, a third split optical fiber ring and the like which are sequentially connected from inside to outside; step S30, respectively winding to obtain a first discrete optical fiber ring, a second discrete optical fiber ring, a third discrete optical fiber ring and the like corresponding to the step S20; and S40, combining the first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring and the like obtained in the step S30 to obtain a multi-layer frameless optical fiber ring. After the scheme is adopted, the multi-layer frameless optical fiber ring has the beneficial effects that the multi-layer frameless optical fiber ring is designed into a plurality of discrete optical fiber rings, so that the production efficiency is greatly improved, the difficulty in winding and curing the multi-layer frameless optical fiber ring is remarkably reduced, and the quality consistency of the multi-layer frameless optical fiber ring is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of skeleton-free optical fiber ring production, and in particular relates to a skeleton-free optical fiber ring with multiple layers and a production method thereof. Background Art

[0002] Inertial navigation technology is the core technology of modern aerospace, military equipment, special equipment orientation and attitude sensing. Fiber optic gyroscope is an important device for realizing inertial navigation technology. Fiber optic ring is an important component of fiber optic gyroscope.

[0003] The skeleton-free fiber ring is a type of fiber ring. The skeleton-free fiber ring is a fiber coil based on the Sagnac effect and is the core element of the interferometric fiber optic gyroscope angular rate sensor. The skeleton-free fiber ring is wound with a certain length of optical fiber, and the ring glue is applied during the winding process to ensure the stability and reliability of the skeleton-free fiber ring. UV curing glue has the advantages of fast curing speed, low curing temperature, no pollution, energy saving, and simple process, and is increasingly used as a ring glue.

[0004] Due to the influence of temperature drift, high-precision skeleton-free fiber rings are generally produced using a quadrupole symmetrical winding process. As the number of layers increases, the winding difficulty and winding time increase rapidly, significantly reducing the production efficiency of skeleton-free fiber rings and increasing the production cost of skeleton-free fiber rings. The curing of UV curing adhesive must be fully irradiated with UV light. When the number of layers of the skeleton-free fiber ring is too many, the UV light received by the bottom layer of UV curing adhesive is significantly attenuated, and the curing uniformity of the skeleton-free fiber ring is poor, resulting in problems such as increased cost, decreased performance, and unstable quality of the skeleton-free fiber ring. Summary of the invention

[0005] In order to solve the above problems in the prior art, the present invention provides a method for producing a multi-layer skeleton-free optical fiber ring, which can ensure the performance and quality consistency of the multi-layer skeleton-free optical fiber ring and reduce the cost.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] As one aspect of the present invention, a method for producing a multi-layer skeleton-free optical fiber ring is provided, and the specific steps are as follows:

[0008] Step S10: designing the number of layers of the skeleton-free optical fiber ring;

[0009] Step S20: separating the multiple layers of skeleton-free optical fiber ring into a first discrete optical fiber ring, a second discrete optical fiber ring, a third discrete optical fiber ring, etc., which are sequentially connected from the inside to the outside; the outer diameter of the first discrete optical fiber ring matches the inner diameter of the second discrete optical fiber ring, the outer diameter of the second discrete optical fiber ring matches the inner diameter of the third discrete optical fiber ring, etc., and so on;

[0010] Step S30: Winding the first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring, etc. corresponding to step S20 respectively;

[0011] Step S40: The first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring, etc. obtained in step S30 are nested and combined in sequence to obtain a multi-layer skeleton-free optical fiber ring.

[0012] Optionally, in step S30, the first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring, ... are respectively obtained by an orthogonal quadrupole symmetrical optical fiber winding process.

[0013] Optionally, in step S40, the pigtail of the first discrete optical fiber ring is fused with the pigtail of the second discrete optical fiber ring, the outer diameter of the first discrete optical fiber ring is bonded with the inner diameter of the second discrete optical fiber ring, the pigtail of the second discrete optical fiber ring is fused with the pigtail of the third discrete optical fiber ring, the outer diameter of the second discrete optical fiber ring is bonded with the inner diameter of the third discrete optical fiber ring... and so on, ultimately obtaining a multi-layer skeleton-free optical fiber ring.

[0014] Optionally, the number of layers of the first discrete optical fiber ring, the number of layers of the second discrete optical fiber ring, the number of layers of the third discrete optical fiber ring... are the same, and the number of layers of the first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring... are all integer multiples of four.

[0015] Optionally, the number of layers of the first discrete optical fiber ring, the number of layers of the second discrete optical fiber ring, the number of layers of the third discrete optical fiber ring, ... are different, and the number of layers of the first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring, ... are all integer multiples of four.

[0016] As another aspect of the present invention, a multi-layer skeleton-less optical fiber ring obtained by the production method of the multi-layer skeleton-less optical fiber ring as described above is provided.

[0017] The beneficial effects of the multi-layer skeleton-free optical fiber ring and the production method thereof of the present invention are specifically embodied in the following aspects: 1. The multi-layer skeleton-free optical fiber ring is designed as a plurality of discrete optical fiber rings, and the discrete optical fiber rings are independently wound, which greatly improves the production efficiency while significantly reducing the difficulty of winding and curing the multi-layer skeleton-free optical fiber ring, thereby improving the quality consistency of the multi-layer skeleton-free optical fiber ring.

[0018] 2. The loss of defective multi-layer skeleton-free optical fiber rings is reduced to the loss of each discrete optical fiber ring, reducing production costs.

[0019] 3. The aging stress release space of the discrete optical fiber ring is more sufficient, and the stress concentration degree is reduced, which effectively reduces the aging stress release risk of the multi-layer frameless fiber optic cable, especially in the aging environment with rapid temperature changes. At the same time, it improves the stress release effect of the multi-layer frameless fiber optic cable and improves the performance of the multi-layer frameless fiber optic cable. As the number of layers of the multi-layer frameless fiber optic cable increases, the advantageous effect will become more significant. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] Figure 1 A schematic diagram of a method for producing a multi-layer skeleton-free optical fiber ring according to the present invention;

[0022] Figure 2 The structure of the multi-layer skeleton-free optical fiber ring of Example 1 of the present invention is shown in FIG. Figure 1 ;

[0023] Figure 3 The structure of the multi-layer skeleton-free optical fiber ring of Example 1 of the present invention is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] A method for producing a multi-layer skeleton-free optical fiber ring according to an embodiment of the present application is as follows: Figure 1 As shown, the specific steps are as follows:

[0026] Step S10: designing the number of layers of the multi-layer skeleton-free optical fiber ring; the multi-layer skeleton-free optical fiber ring is made by using an orthogonal quadrupole symmetrical optical fiber winding manufacturing process; the orthogonal quadrupole symmetrical optical fiber winding manufacturing process is a prior art, such as the preparation method of an optical fiber ring disclosed in Patent Publication No. CN118258372A, entitled A Boss-free Optical Fiber Ring and Its Preparation Method;

[0027] Step S20: separating the multiple layers of skeleton-free optical fiber ring into a first discrete optical fiber ring, a second discrete optical fiber ring, a third discrete optical fiber ring, etc., which are sequentially connected from the inside to the outside; the outer diameter of the first discrete optical fiber ring matches the inner diameter of the second discrete optical fiber ring, the outer diameter of the second discrete optical fiber ring matches the inner diameter of the third discrete optical fiber ring, etc., and so on;

[0028] Step S30: obtaining the first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring, etc. corresponding to step S20 respectively through an orthogonal quadrupole symmetrical optical fiber winding process;

[0029] Step S40: The first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring, etc. obtained in step S30 are nested and combined in sequence to obtain a multi-layer skeleton-free optical fiber ring; specifically, the pigtail of the first discrete optical fiber ring is fused with the pigtail of the second discrete optical fiber ring, the outer diameter of the first discrete optical fiber ring is bonded to the inner diameter of the second discrete optical fiber ring, the pigtail of the second discrete optical fiber ring is fused with the pigtail of the third discrete optical fiber ring, the outer diameter of the second discrete optical fiber ring is bonded to the inner diameter of the third discrete optical fiber ring by ultraviolet curing glue... and so on, to finally obtain a multi-layer skeleton-free optical fiber ring.

[0030] In one embodiment, the number of layers of the first discrete optical fiber ring, the number of layers of the second discrete optical fiber ring, the number of layers of the third discrete optical fiber ring... are the same. Considering the use of an orthogonal quadrupole symmetrical optical fiber winding method, the number of layers of the first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring... are all integer multiples of four.

[0031] In one embodiment, the number of layers of the first discrete optical fiber ring, the number of layers of the second discrete optical fiber ring, the number of layers of the third discrete optical fiber ring... are different. Considering the use of an orthogonal quadrupole symmetrical optical fiber winding method, the number of layers of the first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring... are all integer multiples of four.

[0032] In one embodiment, the first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring, etc. obtained in step S30 are respectively subjected to curing and aging tests. It should be noted that the steps and methods of curing and aging tests are all existing technologies and will not be described in detail.

[0033] A multi-layer skeleton-less optical fiber ring according to another embodiment of the present application is manufactured by the production method of a multi-layer skeleton-less optical fiber ring as described above.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The multi-layer skeleton-free optical fiber ring is designed as multiple discrete optical fiber rings, and the discrete optical fiber rings are independently wound, which greatly improves the production efficiency and significantly reduces the difficulty of winding and curing the multi-layer skeleton-free optical fiber ring, and improves the quality consistency of the multi-layer skeleton-free optical fiber ring.

[0036] 2. The loss of defective multi-layer skeleton-free optical fiber rings is reduced to the loss of each discrete optical fiber ring, reducing production costs.

[0037] 3. The aging stress release space of the discrete optical fiber ring is more sufficient, and the stress concentration degree is reduced, which effectively reduces the aging stress release risk of the multi-layer frameless fiber optic cable, especially in the aging environment with rapid temperature changes. At the same time, it improves the stress release effect of the multi-layer frameless fiber optic cable and improves the performance of the multi-layer frameless fiber optic cable. As the number of layers of the multi-layer frameless fiber optic cable increases, the advantageous effect will become more significant.

[0038] Example 1

[0039] 1) Step S10, designing a multi-layer skeleton-free optical fiber ring: the parameters of the multi-layer skeleton-free optical fiber ring are shown in Table 1.

[0040] Table 1 Parameters of multi-layer skeleton-free optical fiber ring

[0041]

[0042]

[0043] 2) Step S20, designing a discrete optical fiber ring: the parameters of the discrete optical fiber ring are shown in Table 2.

[0044] Table 2 Parameters of discrete fiber rings

[0045]

[0046] 3) Step S30, production of discrete optical fiber rings: each discrete optical fiber ring is wound using an orthogonal quadrupole symmetrical optical fiber winding process, cured using an ultraviolet curing process, aged using high and low temperature cycling, and tested for performance, and each is qualified.

[0047] 4) Step S40, discrete optical fiber ring combination: the outer diameter of the first discrete optical fiber ring is bonded to the inner diameter of the second discrete optical fiber ring, the pigtail of the second discrete optical fiber ring is fused to the pigtail of the third discrete optical fiber ring, and the outer diameter of the second discrete optical fiber ring is bonded to the inner diameter of the third discrete optical fiber ring by UV curing adhesive to obtain a multi-layer skeleton-free optical fiber ring.

[0048] The specific features of the embodiment 1 are as follows: 1. The 120-layer skeleton-less optical fiber ring 100 is designed into three separate optical fiber rings 200, each with 40 layers. Figure 2-Figure 3 As shown, and it meets the requirements of the quadrupole symmetry process. 2. The sum of the lengths of the three discrete fiber rings is consistent with the length of the multi-layer skeleton-free fiber ring. 3. The outer diameter of the three discrete fiber rings after combination is 99.1mm, which is greater than the 99mm of the multi-layer fiber ring, exceeding 0.1mm, and the error is within a reasonable range.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0050] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0051] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0052] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0053] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A method for producing a multi-layer skeleton-free optical fiber ring, characterized in that: The specific steps are as follows: Step S10: designing the number of layers of the skeleton-free optical fiber ring; Step S20: separating the multiple layers of skeleton-free optical fiber ring into a first discrete optical fiber ring, a second discrete optical fiber ring, a third discrete optical fiber ring, etc., which are sequentially connected from the inside to the outside; the outer diameter of the first discrete optical fiber ring matches the inner diameter of the second discrete optical fiber ring, the outer diameter of the second discrete optical fiber ring matches the inner diameter of the third discrete optical fiber ring, etc., and so on; Step S30: Winding the first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring, etc. corresponding to step S20 respectively; Step S40: The first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring, etc. obtained in step S30 are nested and combined in sequence to obtain a multi-layer skeleton-free optical fiber ring.

2. The method for producing a multi-layer skeleton-free optical fiber ring according to claim 1, characterized in that: In step S30, the first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring, ... are respectively obtained by an orthogonal quadrupole symmetrical optical fiber winding process.

3. The method for producing a multi-layer skeleton-free optical fiber ring according to claim 1 or 2, characterized in that: In step S40, the pigtail of the first discrete optical fiber ring is fused with the pigtail of the second discrete optical fiber ring, the outer diameter of the first discrete optical fiber ring is bonded with the inner diameter of the second discrete optical fiber ring, the pigtail of the second discrete optical fiber ring is fused with the pigtail of the third discrete optical fiber ring, the outer diameter of the second discrete optical fiber ring is bonded with the inner diameter of the third discrete optical fiber ring... and so on, finally obtaining a multi-layer skeleton-free optical fiber ring.

4. The method for producing a multi-layer skeleton-less optical fiber ring according to claim 2, characterized in that: The number of layers of the first discrete optical fiber ring, the number of layers of the second discrete optical fiber ring, the number of layers of the third discrete optical fiber ring, ... are the same, and the number of layers of the first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring, ... are all integer multiples of four.

5. The method for producing a multi-layer skeleton-less optical fiber ring according to claim 2, characterized in that: The number of layers of the first discrete optical fiber ring, the number of layers of the second discrete optical fiber ring, the number of layers of the third discrete optical fiber ring, ... are different, and the number of layers of the first discrete optical fiber ring, the second discrete optical fiber ring, the third discrete optical fiber ring, ... are all integer multiples of four.

6. A multi-layer skeleton-free optical fiber ring obtained by the production method of a multi-layer skeleton-free optical fiber ring as claimed in any one of claims 1 to 5.

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