Small-diameter dispersion optical fiber

Abstract

The utility model discloses a thin-diameter dispersion optical fiber, which comprises a cladding, and a fiber core and a total reflection mirror which are arranged in the cladding, the total reflection mirror is arranged at the end part of the cladding, a hollow structure is arranged between the fiber core and the total reflection mirror, a dispersion agent is filled in the hollow structure, and one end, close to the dispersion agent, of the fiber core is a convex spherical surface; one end, far away from the holophote, of the cladding is fixed in the connecting piece, the other end of the connecting piece is provided with an input connector, and the fiber core extends out of the cladding and extends into the input connector. According to the utility model, the hollow structure is arranged in the optical fiber and filled with the dispersants, so that light beams can be effectively and uniformly scattered, and the hot spot phenomenon caused by light beam focusing of the traditional optical fiber is eliminated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of optical fiber, specifically relates to a fine diameter diffusive optical fiber. BACKGROUND

[0002] Diffusive optical fiber is a kind of special optical fiber, it has good light scattering characteristics, make light energy be evenly distributed in the outside of optical fiber, instead of propagating along the optical fiber axis.This characteristic makes diffusive optical fiber very useful in some specific application scenarios.

[0003] 1、Medical imaging: Diffusive optical fiber can be used for medical imaging, for example, in optical coherence tomography (OCT), diffusive optical fiber can evenly distribute laser light into biological tissue, thereby obtaining more detailed tissue images.

[0004] 2、Environmental monitoring: Diffusive optical fiber can be used for environmental monitoring, such as monitoring the moisture content in the soil or detecting gas leaks. Because diffusive optical fiber can evenly distribute light into the surrounding environment, it can provide a wider range of monitoring.

[0005] 3、Safety and explosion-proof applications: Diffusive optical fiber can be used in safety and explosion-proof applications due to its good light dispersion characteristics, such as in flammable gas environments, diffusive optical fiber can reduce the safety risks caused by light concentration.

[0006] 4、Augmented reality (AR) and virtual reality (VR): Diffusive optical fiber can be used in AR and VR systems to provide users with a wider field of view and a richer visual experience.

[0007] 5、Illumination and display technology: Diffusive optical fiber can be used in illumination and display technology, such as in LED lighting, diffusive optical fiber can evenly distribute LED light to the area that needs to be illuminated, new dialogue efficiency and uniformity.

[0008] 6、Laser ablation and photodynamic therapy.

[0009] Most existing diffusive optical fibers use a sleeve method: a diffusive agent sleeve is added to a complete optical fiber with a cladding and coating structure, and the diffusive head produced is generally larger than the diameter of the original optical fiber, which cannot achieve small size packaging. Laser ablation is limited by the surgical site, and there is an increasing demand for small diameter diffusive optical fibers. Utility model content

[0010] To solve the above problems, the utility model provides a fine diameter diffusive optical fiber.

[0011] The technical scheme provided by the utility model is as follows:

[0012] The fine diameter dispersion optical fiber comprises a cladding, a fiber core and a total reflection mirror arranged in the cladding, the total reflection mirror is arranged at an end of the cladding, a hollow structure is arranged between the fiber core and the total reflection mirror, and the hollow structure is filled with a dispersion agent.

[0013] In some embodiments, a hollow connector is further arranged, one end of the cladding away from the total reflection mirror is fixed in the connector, the other end of the connector is provided with an input joint, and the fiber core extends out of the cladding and into the input joint.

[0014] In some embodiments, an optical fiber tail sleeve is arranged at one end of the connector away from the input joint, and the optical fiber tail sleeve and the connector are in interference fit.

[0015] In some embodiments, the cladding is a Teflon tight sleeve layer.

[0016] In some embodiments, one end of the total reflection mirror close to the dispersion agent is a concave reflecting surface.

[0017] In some embodiments, one end of the fiber core close to the dispersion agent is a convex spherical surface.

[0018] In some embodiments, one end of the fiber core close to the dispersion agent is a uniform scattering topography.

[0019] In summary, the beneficial effects of the present utility model are as follows:

[0020] (1) The present utility model can effectively and uniformly scatter the light beam by arranging a hollow structure inside the optical fiber and filling the dispersion agent, and eliminate the hot spot phenomenon caused by the focusing of the light beam of the traditional optical fiber. In actual application, the uniform light beam output significantly improves the performance of the optical fiber in the fields of laser treatment, optical communication, laser radar and the like, especially in the high-power light beam transmission process, reduces the heat loss and the non-uniform distribution of the light beam, and improves the stability and safety of the system.

[0021] (2) The convex spherical surface is adopted at the output end face of the fiber core of the present utility model, the interface scattering is prevented, and the hot spot is formed.

[0022] (3) The concave reflecting design is adopted at one end of the total reflection mirror close to the dispersion agent of the present utility model, the design of the concave reflecting mirror can adjust the reflection focal point, thereby effectively shielding the excessive scattering phenomenon possibly caused by the plane reflection, and reducing the probability of the end overheating. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present utility model;

[0024] Figure 2 It is Figure 1 An enlarged view of A in the middle;

[0025] Figure 3 It is Figure 1Enlarged view at B.

[0026] Reference signs are as follows:

[0027] 1, cladding; 2, core; 3, total reflection mirror; 4, dispersing agent; 5, connecting piece; 6, input joint; 7, optical fiber jacket. DETAILED DESCRIPTION

[0028] In order to deepen the understanding of the utility model, the utility model will be further described in the following embodiments and drawings, the embodiments are only used to explain the utility model, and do not constitute the limitation of the protection scope of the utility model.

[0029] As Figures 1-3 shown, the present application provides a fine diameter dispersion optical fiber, including cladding 1, core 2, total reflection mirror 3, hollow structure and dispersing agent 4. Cladding 1 adopts Teflon tight sleeve layer material, and this material has excellent optical transmission performance, which can ensure that the optical fiber maintains stable transmission quality in high-strength environment. At the same time, Teflon tight sleeve layer also has high chemical stability and strong wear resistance, which effectively protects the optical fiber from the influence of external environment. The design of cladding 1 ensures the integrity of the optical fiber structure and guarantees the complete reflection of optical signal in the optical fiber. At the same time, cladding 1 is in close contact with light guide core 2 without sleeve gap, which reduces the risk of dispersing agent 4 leakage.

[0030] Inside the optical fiber, core 2 is the core part responsible for optical signal transmission. Core 2 is located inside cladding 1, and its one end extends outward into input joint 6. The design of core 2 can effectively support the transmission of ultrashort pulse laser or ultraviolet laser.

[0031] In the fine diameter dispersion optical fiber, the end of core 2 close to dispersing agent 4 adopts special design, and the shape of the end of core 2 can be convex spherical surface or homogenization scattering morphology, so as to realize uniform scattering of light beam. Convex spherical surface design can ensure that the light beam is scattered at a uniform angle and intensity, while homogenization scattering morphology helps to eliminate hot spots caused by light beam focusing, ensuring that the light beam can be uniformly distributed after output.

[0032] Specifically, the end face of the optical fiber is processed by laser micro machining technology into convex surface or homogenization scattering morphology, which can effectively avoid the concentration of light beam at a certain focal point and eliminate the hot spot problem when the light beam is output. This precision machining technology greatly improves the output performance of the optical fiber, so that it can play a greater advantage in application occasions requiring accurate light beam distribution.

[0033] In this embodiment, total reflection mirror 3 is located at the end of cladding 1, which is used to reflect optical signal and control the propagation direction of light beam.

[0034] In a preferred embodiment, the total reflection mirror 3 adopts a concave reflection design, and the end close to the dispersing agent 4 is a concave reflection surface. The design of the concave reflection mirror can adjust the reflection focal point, thereby effectively shielding the excessive scattering phenomenon caused by the plane reflection and reducing the probability of end overheating.

[0035] Further, a hollow structure is arranged in the optical fiber, which is located between the fiber core 2 and the total reflection mirror 3. The hollow structure is filled with the dispersing agent 4 to form a dispersion section. By selecting the dispersing agent 4 with high scattering efficiency, the light beam output by the optical fiber can be effectively and uniformly scattered, so that the light beam output by the optical fiber will not have the phenomenon of excessive concentration or uneven scattering. After the dispersing agent 4 is filled, it is necessary to uniformly fill the hollow structure and eliminate bubbles, so as to ensure the stability of the optical performance of the optical fiber and avoid the influence of bubbles or uneven distribution on the quality of the light beam.

[0036] As a further optimized embodiment, one end of the optical fiber is fixed in the hollow connector 5, and the other end of the connector 5 is provided with an input joint 6. Through the connector 5, the optical fiber can be connected with other equipment to ensure its operability and stability in actual use. The connector 5 also has an additional mechanical support function to ensure that the optical fiber will not be affected by external vibration or pressure during connection and use. The other end of the connector 5 is provided with an optical fiber tail sleeve 7, which is fixed with the connector 5 through interference fit, thereby protecting the optical fiber and further increasing the stability of the optical fiber.

[0037] The preparation method of the fine diameter dispersion optical fiber of the present application is as follows:

[0038] By using a short pulse ultraviolet or ultrashort pulse laser or ultrasonic oscillation processing method, the laser is focused on the quartz part of the fiber core 2 through the Teflon tight sleeve layer of the cladding layer 1, and after the crack is processed, the fiber core 2 and part of the cladding layer 1 are drawn out a section to form a hollow structure with only the Teflon tight sleeve layer.

[0039] The hollow structure is filled with the prepared dispersion liquid, and after the bubbles are eliminated, the Teflon tight sleeve layer is plugged with the total reflection mirror 3, and the total reflection mirror 3 and the Teflon tight sleeve layer are interference fit to form a dispersion section.

[0040] The output section of the fiber core 2 and the cladding layer 1 adopts a laser micro-processing method to form a convex or uniform scattering morphology, so that the output light eliminates the concentrated scattering of the transition interface.

[0041] The end close to the dispersing agent 4 of the total reflection mirror 3 is processed into a concave reflection surface, the reflection focal point is adjusted by changing the curvature of the concave surface, the excessive scattering phenomenon of plane reflection is shielded, and the end hot spot is eliminated.

[0042] It should be noted that the implementation not shown or described in the drawings or the specification is the form known by those skilled in the art, and is not described in detail. In addition, the above definition of each element and method is not limited to the various specific structures, shapes or ways mentioned in the embodiments.

[0043] It should also be noted that the present text can provide an example of a parameter containing a specific value, but these parameters do not necessarily equal the corresponding value, but can be approximately equal to the corresponding value within an acceptable error tolerance or design constraint. The direction of the language mentioned in the embodiments, such as "up", "down", "front", "back", "left", "right", "inside", "outside" and the like, is only the direction of the drawings, and is not intended to limit the scope of the application.

[0044] The above description shows and describes the preferred embodiments of the present application. As mentioned before, it should be understood that the present application is not limited to the form disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application conceived herein by the above teachings or related art or knowledge. Any modification and change made by those skilled in the art without departing from the spirit and scope of the present application shall be within the scope of the claims of the present application.

Claims

1. A narrow-diameter diffuse optical fiber, characterized in that, It includes a cladding (1), a fiber core (2) and a total reflection mirror (3) disposed within the cladding (1), the total reflection mirror (3) being disposed at the end of the cladding (1), and a hollow structure between the fiber core (2) and the total reflection mirror (3), the hollow structure being filled with a dispersant (4).

2. The narrow-diameter diffused optical fiber according to claim 1, characterized in that, It also includes a hollow connector (5), one end of the cladding (1) away from the total reflection mirror (3) is fixed in the connector (5), the other end of the connector (5) is provided with an input connector (6), and the fiber core (2) extends out of the cladding (1) and into the input connector (6).

3. The narrow-diameter diffused optical fiber according to claim 2, characterized in that, The connector (5) has an optical fiber tail sleeve (7) at one end away from the input connector (6), and the optical fiber tail sleeve (7) and the connector (5) are interference-fitted.

4. The narrow-diameter diffuse optical fiber according to claim 1, characterized in that, The cladding (1) is a Teflon tight-fitting layer.

5. The narrow-diameter diffused optical fiber according to claim 1, characterized in that, The end of the total reflection mirror (3) near the dispersant (4) is a concave reflective surface.

6. The narrow-diameter diffused optical fiber according to claim 1, characterized in that, The end of the fiber core (2) near the dispersant (4) is a convex spherical surface.

7. The narrow-diameter diffuse optical fiber according to claim 1, characterized in that, The end of the fiber core (2) near the dispersant (4) has a homogenized scattering morphology.

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