Optical fiber end face corrosion device

Abstract

The utility model discloses an optical fiber end face corrosion device. Comprising a supporting mechanism, a rotating mechanism and a lifting mechanism. The supporting mechanism comprises a base, a stand column and a sliding rail. The lower end of the upright post is contacted and connected with the base, and the upper end of the upright post extends upwards. A sliding rail is arranged on the side face of the stand column, and the sliding direction of the sliding rail is arranged in the vertical direction. The rotating mechanism comprises a sliding block, a rotating machine and a drill chuck. The sliding block is movably arranged on the sliding rail so as to slide up and down along the sliding rail. The outer wall of the rotating machine makes contact with and is connected with the sliding block, and the rotating axis of the rotating machine is arranged in the vertical direction. The lower end of the rotating machine is connected with the drill chuck so as to drive the drill chuck to rotate around the axis of the rotating machine. The lifting mechanism comprises a lever support and a lever. The lower end of the lever bracket is contacted and connected with the base, and the upper end of the lever bracket extends upwards and is rotatably connected with the middle part of the lever. The optical fiber end face corrosion device provided by the utility model can obtain an optical fiber end head with a smooth curved surface and uniformly changing light spots, so that a doctor can accurately operate the optical fiber end face corrosion device.

Description

Technical Field

[0001] The utility model relates to an optical fiber end face corrosion device, belonging to the technical field of optical fiber lasers. Background Art

[0002] After the U.S. Food and Drug Administration (FDA) approved the use of lasers in soft tissue surgery, lasers were used to remove soft tissues in the treatment of various oral diseases, such as periodontal surgery. Lasers provide the energy required for rapid repair of oral lesions and produce corresponding biological effects: hemostasis, bactericidal, antibacterial, anesthesia, analgesia, and healing promotion. The fiber optic blade used in this type of laser instrument is a disposable consumable.

[0003] Since there are burrs, notches, bevels, protrusions and cracks on the end face of the optical fiber after direct cutting, in order to obtain a smooth interface for laser emission, the cut optical fiber end face needs to be polished to form a smooth optical fiber end face. The optical fiber end face polishing angles in the prior art include physical end face (PC), ultra-physical end face (UPC) and oblique physical end face (APC). The laser medical field often uses optical fiber end faces with large arc protrusions such as ultra-physical end faces (UPC) as the light-emitting surface of the terminal optical fiber to make the laser emit smoothly for optical irradiation or tissue cutting. In the Chinese patent application with application number 201910673089.0, a femtosecond laser processing method for optical fiber lenses is disclosed. This technical solution uses a focused femtosecond laser to scan the optical fiber according to the contour of the lens to be prepared, and the material in the area irradiated by the laser focus is modified or etched away; the treated optical fiber end face is partially immersed in a hydrofluoric acid solution, and the material in the modified area is selectively corroded and removed, so that the optical fiber outside the lens contour is detached to form a fiber lens prototype; the etching time is controlled to make the surface of the obtained fiber lens prototype smooth, forming a fiber lens. This technical solution does not have a thermal effect during processing, and convex and concave fiber lenses can be prepared on the optical fiber end face. Similarly, the equipment of the prior art is large and complicated to operate, and is not suitable for deployment and application in medical places. Utility Model Content

[0004] The problem to be solved by the utility model is to provide an optical fiber end face etching device.

[0005] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0006] According to an embodiment of the utility model, there is provided an optical fiber end face etching device, comprising a supporting mechanism, a rotating mechanism and a lifting mechanism; wherein:

[0007] The support mechanism comprises a base, a column and a slide rail; the column is vertically arranged, the lower end of which is in contact with and connected to the base, and the upper end of which extends upward; the slide rail is arranged on the side of the column, and the sliding direction of the slide rail is arranged along the vertical direction;

[0008] The rotating mechanism includes a slider, a rotary machine and a drill chuck; the slider is movably arranged on the slide rail to slide up and down along the slide rail; the outer wall of the rotary machine is in contact with and connected to the slider, and the rotation axis of the rotary machine is arranged in a vertical direction; the lower end of the rotary machine is connected to the drill chuck to drive the drill chuck to rotate around the axis of the rotary machine;

[0009] The lifting mechanism includes a lever bracket and a lever; the lower end of the lever bracket is in contact with and connected to the base; the upper end of the lever bracket extends upward and is rotatably connected to the middle part of the lever; one end of the lever is rotatably and slidably connected to the upper end of the rotating machine.

[0010] Preferably, it also includes an optical fiber clamp; wherein,

[0011] The cross-sectional shape of the optical fiber clamp perpendicular to the axial direction is circular; the optical fiber clamp is used to clamp the optical fiber end, and is connected to the rotating machine through the drill chuck so that the optical fiber end and the rotating machine rotate coaxially.

[0012] Preferably, the optical fiber clamp comprises a clamp body; wherein,

[0013] The cross section of the clamp body includes a first left edge, a second left edge, a first contact edge, a left panel edge, a bottom panel edge, a right panel edge, a second contact edge, a first right edge, a second right edge and an arc edge, which are connected in sequence and form a certain angle; the arc edge is an arc, one end of the arc edge is connected to the first left edge, and the other end is connected to the second right edge;

[0014] The first contact edge and the second contact edge are coplanar and coincide with the median plane of the arc edge; the first left edge and the second right edge are parallel and of equal length, the first left edge is lower than the first contact edge, and the second right edge is higher than the second contact edge; the second left edge and the first right edge are parallel.

[0015] Preferably, the first left edge extends along the axis direction of the clamp body to form a left stop surface; a notch groove is arranged on the left stop surface, and an extension direction of the notch groove is perpendicular to the left stop surface and the axis direction of the clamp body.

[0016] Preferably, the first left edge and the second left edge extend along the axial direction of the clamp body to form a left stop;

[0017] The first right edge and the second right edge extend along the axial direction of the clamp body to form a right stop;

[0018] Of the left stop and the right stop, one is a concave structure and the other is a convex structure. Only when the left stop is opposite to the right stop can the two clamp bodies be closed.

[0019] Preferably, the optical fiber clamp further comprises an embedding material; wherein,

[0020] The left inlay edge, the bottom inlay edge and the right inlay edge extend along the axis direction of the clamp body to form an inlay groove; the inlay is arranged in the inlay groove, and the upper surface of the inlay is flush with the first contact edge and the second contact edge.

[0021] Preferably, the insert is made of soft material.

[0022] Preferably, the support mechanism further includes a leveling mechanism; wherein,

[0023] The leveling mechanism is connected to the base and is a four-point leveling structure.

[0024] Preferably, the support mechanism further comprises a temperature control disk; wherein,

[0025] The temperature control disk is arranged on the upper surface of the base and is a structure capable of contacting with the corrosive liquid container to heat and maintain the temperature of the corrosive liquid.

[0026] Preferably, the rotating mechanism further includes a locking mechanism; wherein,

[0027] The locking mechanism is arranged on the slider, and is a structure capable of locking the relative position of the slider and the slide rail. Compared with the prior art, the utility model utilizes the corresponding relationship between the etching rate, the fiber core radius and the rotation angular velocity, and the optical fiber end face etching device is used to produce an optical fiber end, whose end face has a smooth curved surface, which can avoid sudden changes in the light spot, so as to obtain a uniformly changing light spot, so that doctors can operate accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 (a) is a schematic diagram of the relationship between the corrosion rate and relative speed of the optical fiber in the corrosion solution;

[0029] FIG1( b ) is a schematic diagram showing the relationship between the corrosion rate of the optical fiber in the corrosive solution and the optical fiber radius;

[0030] FIG2 (a) is a schematic diagram of the structure of the optical fiber clamp in the first embodiment of the utility model;

[0031] FIG2( b ) is a schematic cross-sectional view of the clamp in FIG2( a );

[0032] Figure 3This is a schematic structural diagram of an optical fiber end face etching device in the second embodiment of the utility model;

[0033] Figure 4 for Figure 3 A schematic structural diagram of another form of the optical fiber end face etching device;

[0034] Figure 5 This is a schematic diagram of the structure of the connection between the optical fiber end and the ferrule in the third embodiment of the utility model; Figure 6 FIG. 4 is a schematic diagram of the corrosion effect of the optical fiber end face in the fourth embodiment of the present utility model. DETAILED DESCRIPTION

[0035] The technical content of the present utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] The technical concept in the embodiment of the utility model is to rotate the optical fiber in the etching liquid, and use the principle that the radial linear speed is getting larger and larger with the optical axis of the optical fiber as the center, so that the etching liquid is no longer a plane, thereby forming a smooth curved end face (for example, a hemispherical surface) protruding outward with the optical axis of the optical fiber as the center, which makes the end face of the optical fiber achieve an effect similar to a convex lens, so that the light spot changes continuously and evenly, and the light beam is smooth and will not mutate. Mutations will cause the light beam to be uncontrollable, which makes it impossible for doctors to know the precise energy distribution of the optical fiber cutter head they use, and it is impossible to perform precise cutting operations. For example, when a pulsed laser used for dental soft tissue cutting cuts gums, it is necessary to make the light spot area with high power density only located in the part of the gums that need to be cut off, and not located in the part of the gums that need to be retained, and vice versa. If there is a sudden change in the light spot and a sudden change in power density, the doctor will not be able to control the position of the cutting line, resulting in miscutting or missing cutting.

[0037] Specifically, the optical fiber rotates around its own axis, and the optical fiber end is distributed along the radial circumference. Due to the difference in rotation radius, the rotation linear speed of each circumference must be different. In other words, the farther the circumference is from the optical fiber axis, the larger the rotation radius, the greater the linear speed, the greater the rate of corrosion by the corrosive liquid, and the larger the volume removed by corrosion per unit time. The closer the circumference is to the optical fiber axis, the smaller the rotation radius, the smaller the linear speed, the smaller the rate of corrosion by the corrosive liquid, and the smaller the volume removed by corrosion per unit time. Therefore, the optical fiber end rotating in the corrosive liquid forms a smooth shape with a central protrusion, becoming various convex optical fiber lenses with optical quality surfaces.

[0038] It is well known to those skilled in the art that the relationship between the corrosion rate S and the relative velocity v of the optical fiber in the corrosion solution is:

[0039] S=k×(D)^m×(v)^n (1)

[0040] Wherein, S is the corrosion rate, D is the concentration of the corrosion solution, v is the relative speed, k is the coefficient, m and n are power exponents, and n is a preset constant greater than 1.

[0041] After selecting a specific concentration and specific composition of the etching solution (such as hydrofluoric acid, sulfuric acid and hydrochloric acid and their mixtures), the above formula can be simplified to:

[0042] S = P × (v)^n (2)

[0043] Where P is a constant corresponding to a specific corrosive solution, hereinafter referred to as the corrosion constant P.

[0044] According to v = ω × R, where ω represents the rotation speed and R represents the radius of the fiber optic cutting head, equation 2 can be transformed into:

[0045] S=P×(ω×R)^n (3)

[0046] It can be seen from formula 3 that when the radius R, constant P, and power index n of the optical fiber cutter head are known, the corrosion rate S is only positively correlated with the rotation speed ω. That is, the expected corrosion rate S can be obtained by controlling the rotation speed ω. The above formulas 1 to 3 are all empirical formulas.

[0047] Moreover, because the curve is a single-value curve, under the premise of a fixed angular velocity, the curve is a fixed single-value curve, that is, the processing curve is unique and definite, that is, the curve shown in Figure 1 (a) or Figure 1 (b). Furthermore, according to the radius R, a unique corrosion rate S value can be obtained; the corrosion rate S is also the processing depth of the short optical fiber. It can be seen that in practical applications, for the selected short optical fiber and etching liquid, the radius R and the corrosion constant P are known, and a specific corrosion rate S is used as the processing target. According to Figure 1 (b), the corresponding angular velocity can be selected.

[0048] It should be noted that the product of the corrosion rate S and the processing time is the corrosion depth, which is the corrosion depth of the periphery of the optical fiber. The corrosion depth varies depending on the application scenario of the short optical fiber. For example, the corrosion depth of the short optical fiber used as the optical fiber cutter head of a specific model of laser medical instrument is a certain value. Based on this value, the corrosion rate S can be obtained as the processing target.

[0049] First embodiment

[0050] The utility model provides a short optical fiber (optical fiber blade, optical fiber end) for laser medical treatment, with a length of 15 to 25 mm, preferably 20 mm, which is used to replace the optical fiber head of the long optical fiber of the laser medical equipment and is a replaceable consumable.

[0051] The light-emitting end of the short optical fiber has a smooth curved surface with a convex center, and the curved surface satisfies Formula 1, Formula 2 or Formula 3.

[0052] As shown in Fig. 2 (a), this embodiment provides a fiber clamp 4 of a fiber end face etching device, comprising two clamp bodies 41 and two inserts 42. The fiber clamp 4 is closed to clamp the short optical fiber 200. The cross-sectional shape of the closed fiber clamp 4 in the direction perpendicular to the axis is circular.

[0053] As shown in FIG2(b), the cross section of the clamp body 41 includes a first left edge 411, a second left edge 412, a first contact edge 413, a left insert edge 414, a bottom insert edge 415, a right insert edge 416, a second contact edge 417, a first right edge 418, a second right edge 419 and an arc edge 410. The arc edge 410 is an arc shape, one end of the arc edge 410 is connected to the first left edge 411, and the other end is connected to the second right edge 419. The first left edge 411, the second left edge 412, the first contact edge 413, the left insert edge 414, the bottom insert edge 415, the right insert edge 416, the second contact edge 417, the first right edge 418 and the second right edge 419 are connected in sequence and form a certain angle with each other. The first contact edge 413 and the second contact edge 417 are coplanar and coincide with the mid-plane of the arc edge 410. The first left edge 411 and the second right edge 419 are parallel and of equal length, and the first left edge 411 is lower than the first contact edge 413, and the second right edge 419 is higher than the second contact edge 417. The second left edge 412 and the first right edge 418 are parallel.

[0054] The first left edge 411 and the second left edge 412 extend along the axial direction of the clamp body 41 to form a left stop 44. The first right edge 418 and the second right edge 419 extend along the axial direction of the clamp body 41 to form a right stop 45. Among them, the left stop 44 of one clamp body 41 can fit with the right stop 45 of another clamp body 41, and vice versa. Because the left stop 44 is a concave structure and the right stop 45 is a convex structure, the two clamp bodies 41 are in a closed state, and the left stop 44 and the right stop 45 fit together to play a positioning role. When the matching direction of the two clamp bodies 41 is wrong, the two right stops 45 will be opposite to each other, and they cannot be installed. Only when the left stop 44 and the right stop 45 are opposite to each other, can the two clamp bodies 41 be closed. Therefore, the left stop 44 and the right stop 45 can fix the installation direction of the clamp body 41, and have a fool-proof function.

[0055] The first left edge 411 extends along the axis of the clamp body 41 to form a left stop surface 46. A notch groove 47 is provided on the left stop surface 46, and the extending direction of the notch groove 47 is perpendicular to the left stop surface 46 and extends in a direction perpendicular to the axis of the clamp body 41. The notch groove 47 is used to manually separate the closed clamp body 41.

[0056] The left embedding edge 414, the bottom embedding edge 415 and the right embedding edge 416 extend along the axial direction of the clamp body 41 to form an embedding groove 48, in which the embedding 42 is arranged. The upper surface of the embedding 42 is flush with the first contact edge 413 and the second contact edge 417. The embedding 42 is made of a soft material, such as soft rubber or silicone. The embedding 42 is used to press the short optical fiber 200. Because the short optical fiber 200 has a thin diameter and a brittle material, it cannot be directly contacted and pressed by a hard clamp. The embedding 42 made of a soft material contacts the short optical fiber 200, and relies on the natural deformation of the embedding 42 after being pressed by the short optical fiber 200 to disperse the clamping force of the optical fiber clamp 4 on the short optical fiber 200.

[0057] The filler 42 is provided with a notch 43 along the center line, and the notch 43 is colinear with the axis of the optical fiber clamp 4 to mark the clamping position of the short optical fiber 200 in the optical fiber clamp 4 .

[0058] Second embodiment

[0059] like Figure 3 As shown, this embodiment provides an optical fiber end face etching device 100, which includes a supporting mechanism 1, a rotating mechanism 2, a lifting mechanism 3 and an optical fiber clamp 4.

[0060] The support mechanism 1 includes a base 11, a leveling mechanism 12, a temperature control plate 13, a column 14 and a slide rail 15.

[0061] The base 11 is the foundation and support of the entire device, and the leveling mechanism 12 adopts a three-point or more-point leveling structure, which is connected to the base 11 to achieve the horizontal setting of the base 11. Preferably, the leveling mechanism 12 adopts a four-point leveling. The base 11 and the leveling mechanism 12 are prior art and will not be described in detail.

[0062] The temperature control plate 13 is disposed on the upper surface of the base 11 and is used to contact the corrosive liquid container 300 to heat and maintain the temperature of the corrosive liquid 500 to obtain a better corrosion effect.

[0063] The column 14 is vertically arranged, with the lower end in contact with the base 11 and the upper end extending upward. A slide rail 15 is arranged on the side of the column 14, and the sliding direction of the slide rail 15 is arranged along the vertical direction.

[0064] The rotating mechanism 2 includes a slider 21, a locking mechanism 22, a rotating machine 23 and a drill chuck 24.

[0065] The slider 21 is movably arranged on the slide rail 15 and slides up and down along the slide rail 15. The slider 21 is provided with a locking mechanism 22 for locking the slider 21 and the slide rail 15 to fix the position of the slider 21 on the slide rail 15.

[0066] The rotation axis of the rotary machine 23 is arranged in the vertical direction, and the outer wall of the rotary machine 23 is in contact with and connected to the slider 21. The lower end of the rotary machine 23 is connected to the drill chuck 24, which can drive the drill chuck 24 to rotate around the axis of the rotary machine 23. The drill chuck 24 is a prior art, such as a hand-tightened drill chuck or a self-tightened drill chuck, which will not be described in detail here.

[0067] The optical fiber clamp 4 is installed in the drill chuck 24, and the axis of the optical fiber clamp 4 is coaxial with the rotation axis of the rotary machine 23. The optical fiber clamp 4 is used to clamp the short optical fiber 200 for rotary etching.

[0068] The lifting mechanism 3 includes a lever bracket 31 and a lever 32.

[0069] The lower end of the lever bracket 31 is in contact with and connected to the base 11 , and the upper end of the lever bracket 31 extends upward and is rotatably connected to the middle portion of the lever 32 .

[0070] The middle part of the lever 32 is rotatably connected to the upper end of the lever bracket 31 , the left end of the lever 32 is rotatably and slidably connected to the upper end of the rotating machine 23 , and a handle 321 is provided at the right end of the lever 32 .

[0071] like Figure 3 As shown, the short optical fiber 200 is clamped in the optical fiber clamp 4 along the notch 43 and a certain length is exposed outside the optical fiber clamp 4. The section of the optical fiber clamp 4 without the short optical fiber exposed is set in the drill chuck 24 and clamped and fixed by the drill chuck 24. The axis of the short optical fiber 200 is coaxial with the axis of the rotating machine 23.

[0072] like Figure 4 As shown, the handle 321 is moved upward, and the left end of the lever 32 is moved downward under the influence of the force of the lever bracket 31, driving the rotating mechanism 2 to move downward along the slide rail 15. The locking mechanism 22 is locked at the required height to fix the vertical position of the rotating mechanism 2. The rotary machine 23 drives the drill chuck 24 and the optical fiber clamp 4 to rotate. The locking mechanism 22 is unlocked, the handle 321 is moved downward, and the rotating mechanism 2 moves upward.

[0073] Third embodiment

[0074] Different from the second embodiment, this embodiment does not include the optical fiber clamp 4, and does not use the optical fiber clamp 4 to clamp the short optical fiber 200. Instead, the short optical fiber 200 is coaxially connected to the ferrule 400. Figure 5 The ferrule 400 is installed in the drill chuck 24 , the short optical fiber 200 extends downward, and the axes of the ferrule 400 and the short optical fiber 200 are coaxial with the rotation axis of the rotating machine 23 .

[0075] Fourth embodiment

[0076] This embodiment provides a rotary optical fiber end face etching method. An etching liquid container 300 is set on the temperature control disk 13, and an etching liquid 500 is set in the etching liquid container 300. Because the etching rates of the etching liquid 500 at different temperatures on the short optical fiber 200 are different, the temperature control disk 13 heats and maintains the temperature of the etching liquid 500 at a set temperature.

[0077] It should be noted that the rotary optical fiber end face etching method of the present invention can adopt the optical fiber end face etching device of the first to third embodiments described above, or other processing devices, as long as the short optical fiber can be fixed and rotated so that the end face of the short optical fiber rotates in the etching liquid at a preset angular velocity. In the following description, the optical fiber end face etching device of the aforementioned embodiment is used as an example for explanation, but it does not constitute a limitation of the present invention.

[0078] like Figure 6 As shown, the optical fiber end face corrosion method includes the following steps:

[0079] S1: Obtain the corrosion constant P of the etching solution currently used for processing.

[0080] As mentioned above, the corrosion constant P is the product of k and D^m in Formula 1. During processing, the composition and ratio of the etching solution are known, so the corrosion constant P corresponding to the etching solution can be obtained.

[0081] The corrosion constant P is obtained by preliminary testing, including the following steps:

[0082] S11: inserting the etching solution (etching solution concentration D0, etching constant P0) used for processing into the fiber core with a standard radius R0, and rotating the fiber core at an angular velocity ωx (x is a positive integer) for a unit time T (for example, T is 10 seconds, 30 seconds or 1 minute);

[0083] S12: taking out the fiber core processed in step S11, cleaning it and detecting the corrosion depth of its periphery as the corrosion rate S;

[0084] S13: Substitute the corrosion rate S, angular velocity ωx and radius R0 into equation 3,

[0085] Substitute the corrosion rate Sx, angular velocity ωx and radius R0 into the following formula:

[0086] Sx=P0×(ωx×R0)^n0 (4)

[0087] S14: Replace the fiber core with a radius R1, repeat steps S11 to S13 multiple times, and obtain the values ​​of P0 and n0 in equation 4 through numerical calculation;

[0088] That is, the values ​​of P0 and n0 in S=P0×(ω×R)^n0 are obtained.

[0089] Those skilled in the art will appreciate that the values ​​of k, m, and n may also be obtained to replace the value of P.

[0090] S15: forming a corresponding relationship between corrosion constant P0-fiber core radius R-corrosion rate S-angular velocity ω (e.g., the curve shown in FIG1(b) or equation 3);

[0091] S16: changing the composition or ratio of the etching solution used for processing to obtain a new etching solution (etching solution concentration D1, etching constant P1), and then repeating steps S11 to S14 to obtain the corresponding relationship of etching constant P1-fiber core radius R-etching rate S-angular velocity ω corresponding to the new etching solution;

[0092] S17: Repeat step S16 to obtain the corresponding relationship between corrosion constant P-core radius R-corrosion rate S-angular velocity ω, and store it in the optical fiber end face corrosion device for retrieval or query during processing.

[0093] Those skilled in the art can understand that if only one fixed etching solution is used in actual application, steps S16 and S17 can be omitted, and only steps S11-S15 can be used to obtain the corresponding relationship of the etching constant P0-fiber core radius R-etching rate S-angular velocity ω corresponding to this etching solution.

[0094] S2: Based on the previously obtained relationship between corrosion constant P-core radius R-corrosion rate S-angular velocity ω, according to the core radius R of the short optical fiber to be processed and the corrosion constant P in step S1, the angular velocity ω corresponding to the corrosion rate S as the processing target is obtained.

[0095] The angular velocity ω is positively correlated with the core radius R, more specifically, positively correlated with R to the nth power (n is a coefficient greater than 1).

[0096] S3: insert the core of the end of the short optical fiber into the etching liquid, and the insertion depth is greater than or equal to the etching depth H, and then rotate the core around the center line of the core at the angular velocity ω obtained in step S2 to obtain the expected smooth surface.

[0097] The stub optical fiber 200 is physically stripped to obtain a bare core, typically a silica core.

[0098] The end of the bare fiber core to be processed is inserted into the etching solution, and the insertion depth is greater than the etching depth H. Since the etching depth H and the etching rate S satisfy: H = S × T (T is the processing time), the etching depth H can be obtained according to the etching rate S as the processing target.

[0099] Since the short optical fiber of the utility model is only used to avoid sudden changes in the light spot, that is, the short optical fiber only needs to have a smooth curved surface, so only the corrosion depth H of the periphery is determined as the processing target. The specific smooth curved surface can be determined by the corrosion depth H and the core radius R of the bare fiber core, as shown in Figure 1 (b), and the corresponding angular velocity can be determined. The optical fiber end face obtained by rotating based on the angular velocity can meet the needs of practical applications.

[0100] Furthermore, the curved surface formed by the smooth curved surface on the end face of the optical fiber can also play a certain role as a plano-convex lens, and form a certain convergence on the outgoing laser through the convex surface to achieve a better tissue cutting purpose.

[0101] The rotating machine 23 drives the short optical fiber 200 to rotate around the axis of the short optical fiber 200, and obtains a smooth curved surface with a central protrusion at the end of the short optical fiber 200 by etching. The curved surface satisfies the relationship of equations 1 to 3.

[0102] S4: Rinse and dry the end of the short optical fiber.

[0103] The end of the corroded short optical fiber is rinsed with distilled water, and then the rinsed short optical fiber 200 is placed in an ultrasonic cleaning machine for cleaning, and then the short optical fiber 200 is dried. This is a conventional step and will not be described in detail.

[0104] Fifth embodiment

[0105] This embodiment provides a short optical fiber obtained by a rotational optical fiber end face etching method.

[0106] The short optical fiber 200 is obtained by using the optical fiber end face etching device 100 and the optical fiber end face etching method, and has a length of 20 to 50 mm, preferably 20 to 25 mm. The end of the short optical fiber 200 where light comes out has a smooth shape with a central protrusion. The short optical fiber 200 is used to replace the optical fiber head of a laser medical device. If the optical fiber is too long, it may not be able to achieve concentric rotation during rotation.

[0107] In summary, the optical fiber end provided by the embodiment of the utility model uses an optical fiber end face etching device to insert the fiber core of the optical fiber end into the etching liquid, and rotates around the center line of the fiber core at an angular velocity corresponding to the radius of the fiber core to obtain a smooth optical fiber end face with a central bulge. The optical fiber with such a smooth end face can reduce the interface loss during laser emission and form a centrally symmetrical and smoothly distributed optical power density emission spot, so as to be applied to various laser medical occasions for optical irradiation or tissue cutting.

[0108] It should be noted that the above-mentioned multiple embodiments are only examples, and the technical solutions of the various embodiments can be combined, all of which are within the protection scope of the present utility model.

[0109] The optical fiber end face etching device provided by the utility model is described in detail above. For those skilled in the art, any obvious changes made to the utility model without departing from the essence of the utility model will constitute an infringement of the patent right of the utility model and will bear corresponding legal responsibilities.

Claims

1. An optical fiber end face etching device, characterized in that It includes a supporting mechanism, a rotating mechanism and a lifting mechanism; wherein, The support mechanism comprises a base, a column and a slide rail; the column is vertically arranged, the lower end of which is in contact with and connected to the base, and the upper end of which extends upward; the slide rail is arranged on the side of the column, and the sliding direction of the slide rail is arranged along the vertical direction; The rotating mechanism includes a slider, a rotary machine and a drill chuck; the slider is movably arranged on the slide rail to slide up and down along the slide rail; the outer wall of the rotary machine is in contact with and connected to the slider, and the rotation axis of the rotary machine is arranged in a vertical direction; the lower end of the rotary machine is connected to the drill chuck to drive the drill chuck to rotate around the axis of the rotary machine; The lifting mechanism includes a lever bracket and a lever; the lower end of the lever bracket is in contact with and connected to the base; the upper end of the lever bracket extends upward and is rotatably connected to the middle part of the lever; one end of the lever is rotatably and slidably connected to the upper end of the rotating machine.

2. The optical fiber end face etching device as claimed in claim 1, characterized in that Also included is an optical fiber clamp; wherein, The cross-sectional shape of the optical fiber clamp perpendicular to the axial direction is circular; the optical fiber clamp is used to clamp the optical fiber end, and is connected to the rotating machine through the drill chuck so that the optical fiber end and the rotating machine rotate coaxially.

3. The optical fiber end face etching device as claimed in claim 2, characterized in that The optical fiber clamp comprises a clamp body; wherein, The cross section of the clamp body includes a first left edge, a second left edge, a first contact edge, a left panel edge, a bottom panel edge, a right panel edge, a second contact edge, a first right edge, a second right edge and an arc edge, which are connected in sequence and form a certain angle; the arc edge is an arc, one end of the arc edge is connected to the first left edge, and the other end is connected to the second right edge; The first contact edge and the second contact edge are coplanar and coincide with the median plane of the arc edge; the first left edge and the second right edge are parallel and of equal length, the first left edge is lower than the first contact edge, and the second right edge is higher than the second contact edge; the second left edge and the first right edge are parallel.

4. The optical fiber end face etching device as claimed in claim 3, characterized in that The first left edge extends along the axis direction of the clamp body to form a left stop surface; a notch groove is arranged on the left stop surface, and an extending direction of the notch groove is perpendicular to the left stop surface and the axis direction of the clamp body.

5. The optical fiber end face etching device according to claim 3, characterized in that: The first left edge and the second left edge extend along the axial direction of the clamp body to form a left stop; The first right edge and the second right edge extend along the axial direction of the clamp body to form a right stop; Of the left stop and the right stop, one is a concave structure and the other is a convex structure. Only when the left stop is opposite to the right stop can the two clamp bodies be closed.

6. The optical fiber end face etching device as claimed in claim 3, characterized in that The optical fiber clamp also includes an embedding material; wherein, The left inlay edge, the bottom inlay edge and the right inlay edge extend along the axis direction of the clamp body to form an inlay groove; the inlay is arranged in the inlay groove, and the upper surface of the inlay is flush with the first contact edge and the second contact edge.

7. The optical fiber end face etching device according to claim 6, characterized in that The inlay material is made of soft material.

8. The optical fiber end face etching device according to claim 1, characterized in that The support mechanism also includes a leveling mechanism; wherein, The leveling mechanism is connected to the base and is a four-point leveling structure.

9. The optical fiber end face etching device according to claim 7, characterized in that The support mechanism also includes a temperature control disk; wherein, The temperature control disk is arranged on the upper surface of the base and is a structure capable of contacting with the corrosive liquid container to heat and maintain the temperature of the corrosive liquid.

10. The optical fiber end face etching device according to claim 1, characterized in that The rotating mechanism further includes a locking mechanism; wherein the locking mechanism is arranged on the slider and is a structure capable of locking the relative positions of the slider and the slide rail.

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