Optical fiber laser coupler capable of realizing real-time optical fiber detection

Abstract

The invention discloses an optical fiber laser coupler capable of realizing real-time optical fiber detection, which comprises a coupler base and a coupling head, and is characterized in that one end of the coupling head is provided with a coupling input end assembly, and the other end is provided with a coupling output end assembly; an optical shutter assembly is arranged on the side face of the coupling head and used for controlling opening and closing of a laser channel in the coupling head. A sensing and protection integrated assembly is integrated at the end part of a coupling output end assembly of the coupling head, an optical coupling sensing module is integrated in the sensing and protection integrated assembly, and the optical coupling sensing module is used for receiving light refracted or reflected by the damaged surface of the optical fiber, converting an optical signal into an electric signal and sending the electric signal to a control end. According to the optical fiber laser coupler, two independent optical fibers with the diameter smaller than 200 micrometers can be coupled, the working state of the laser can be fed back in time, the optical fibers connected to the two ends of the coupling head can be independently inserted, pulled and replaced, and meanwhile excellent optical performance and mechanical stability are kept.

Description

Technical Field

[0001] This invention relates to the field of fiber laser technology, and in particular to a fiber laser coupler that connects to optical fibers at both ends and enables real-time detection of the optical fibers. Background Technology

[0002] Modern medical laser technology has gradually transitioned from traditional solid-state lasers and gas lasers to fiber lasers, mainly due to the significant advantages of fiber lasers in terms of beam quality, system integration, and energy conversion efficiency.

[0003] Medical fiber lasers typically operate in the near-infrared band (e.g., 1064nm–2100nm), wavelengths that exhibit specific interaction mechanisms with biological tissues. The core of the system consists of three parts: the laser source, the transmission fiber, and the terminal application devices. Among these, the fiber optic coupler serves as the crucial interface connecting the laser source and the transmission fiber, and its performance directly affects the stability and therapeutic effect of the entire system.

[0004] In addition, existing fiber optic coupling devices only consider the detection of fiber insertion and removal and do not have laser emission detection function. The main controller integrated on the fiber optic coupling device cannot know the working status of the laser in a timely manner. Therefore, the existing fiber optic coupling devices have safety hazards in clinical applications.

[0005] In a fiber laser, the coiled optical fiber extends from inside the laser all the way to the outside. When docking with external optical fibers, a coupling device is needed to couple the fibers at both ends of the laser. To couple even thinner medical fibers, achieving coupling to 200μm or smaller fibers, the design and matching of the lenses are extremely important. Improper material selection or design can affect the coupling effect, preventing the output of the required laser power, or even damaging the end face of the medical fiber, rendering it unusable.

[0006] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a fiber laser coupler that can realize real-time detection of optical fibers. Summary of the Invention

[0007] The purpose of this invention is to provide a fiber laser coupler that enables real-time fiber detection. This fiber laser coupler can couple two independent optical fibers with a diameter of less than 200 μm and can provide timely feedback on the working status of the laser. This allows the optical fibers connected to both ends of the coupling head to be independently plugged in, unplugged, and replaced, while maintaining excellent optical performance and mechanical stability.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] The present invention provides a fiber laser coupler capable of real-time fiber detection, the fiber laser coupler comprising:

[0010] Coupler base;

[0011] A coupling head is assembled on the coupler base, with a coupling input component installed at one end and a coupling output component installed at the other end;

[0012] A shutter assembly is provided on the side of the coupling head, near the coupling output end assembly, and the shutter assembly is used to control the opening and closing of the laser channel inside the coupling head.

[0013] The coupling output end component of the coupling head integrates a sensing and protection integrated component. The sensing and protection integrated component integrates an optical coupler transmitting module and an optical coupler receiving module. The optical coupler transmitting module and the optical coupler receiving module cooperate to detect the insertion and removal of the optical fiber from the coupling output end component. The optical coupler receiving module converts the optical signal into an electrical signal and sends it to the control terminal.

[0014] The sensing and protection integrated component also integrates an optical coupler sensing module, which is used to receive light refracted or reflected by the damaged surface of the optical fiber, and convert the optical signal into an electrical signal and send it to the control terminal.

[0015] Furthermore, a threaded hole is machined on the lower part of the coupling head near the coupling input terminal assembly, and a mounting hole is machined at the position where the coupler base mates with the threaded hole;

[0016] A compression spring is installed in the threaded hole and the mounting hole, and the coupler base and the coupling head are connected by bolts.

[0017] The threaded hole has circular grooves on both sides, and a first steel ball is placed in the circular groove. The upper and lower parts of the first steel ball are positioned by pads embedded in the corresponding circular grooves.

[0018] Furthermore, the coupling head includes:

[0019] The coupling head body has a rectangular parallelepiped structure, and the interior of the coupling head body is formed into a cavity;

[0020] The upper cover plate is installed on the upper end of the coupling head body, and the bottom surface of the upper cover plate has a right-angled triangular protrusion structure protruding towards the cavity interior of the coupling head body;

[0021] The right-angled triangular protrusion structure has a laser channel inside, and both right-angled sides of the right-angled triangular protrusion structure are machined with grooves for embedding high-transmittance filter lenses. Two high-transmittance filter lenses with coatings are arranged at a 90° angle through the two right-angled sides.

[0022] The coupling head body and the coupling output terminal assembly are connected at one end to a lens barrel, and a coupling convex lens is installed at the end of the lens barrel through a sleeve.

[0023] Furthermore, the coupling input component includes:

[0024] A two-dimensional adjusting flange is installed at the end of the coupling head body, and a collimating lens is fixed inside the two-dimensional adjusting flange by a collimating lens pressure ring.

[0025] The fiber optic connector nut head is threaded into the two-dimensional adjusting flange, and a nut ring is provided at the connection between the fiber optic connector nut head and the two-dimensional adjusting flange.

[0026] Furthermore, a circular deep hole is machined on the side of the coupling head body, and the optical shutter assembly is installed in the circular deep hole of the coupling head body;

[0027] The optical shutter assembly includes:

[0028] A shutter fixing structure fixed to the coupler base, wherein the shutter fixing structure is provided with an optical coupler plate;

[0029] A rotating electromagnet is installed on the fixed structure of the optical shutter, and an optical coupler baffle that can rotate with the rotating electromagnet is installed at the end of the rotating electromagnet, and one end of the optical coupler baffle extends outward to form a blocking part.

[0030] The optical shutter assembly also includes:

[0031] A fixed bushing and a rotating shaft of an optical shutter installed inside the coupling head are provided on the rotating shaft of the optical shutter. The optical shutter plate rotates with the rotating shaft of the optical shutter and is used to block the laser beam at a specific angle.

[0032] The shutter rotating shaft is connected to the rotating electromagnet via a connector, and the rotating electromagnet drives the shutter rotating shaft to rotate.

[0033] When the optical shutter rotation shaft drives the optical shutter plate to block the laser beam, the blocking part of the optical coupler baffle rotates into the optical coupler plate and blocks the optical coupler to cut off the signal received by the optical coupler.

[0034] Furthermore, the coupling output end assembly includes a two-dimensional adjustment frame installed at the end of the coupling head body, and a cylindrical output end fiber optic connector fixed at the end of the two-dimensional adjustment frame.

[0035] The lens barrel extends into the cylindrical output fiber optic connector along the axial direction of the cylindrical output fiber optic connector.

[0036] Furthermore, the two-dimensional adjustment frame is provided with fine-tooth nut sleeves in both the X and Y directions, and a cylindrical head set screw is installed inside the fine-tooth nut sleeve;

[0037] The two-dimensional adjustment frame is provided with a nut located below the side of the two-dimensional adjustment frame along the diagonal direction of the angle between the two cylindrical head screws. A pressure spring is encapsulated inside the two-dimensional adjustment frame through the nut, and a second steel ball is provided at one end of the inner side of the pressure spring.

[0038] Circular pads are provided at the mating positions of the coupling head body, the cylindrical head top screw, and the second steel ball.

[0039] Furthermore, the sensing and protection integrated component is disposed at the front end of the cylindrical output fiber optic connector;

[0040] The sensing and protection integrated component includes:

[0041] A first outer shell and a second outer shell, wherein the second outer shell is positioned and fixed to the cylindrical output end fiber optic connector by a set screw, and the end of the cylindrical output end fiber optic connector extends from the first outer shell to the outside;

[0042] The first housing integrates the optical coupler transmitting module, the optical coupler receiving module, and the optical coupler sensing module.

[0043] Furthermore, a protective mirror structure is installed on the lower part of the first outer shell;

[0044] The protective goggle structure includes:

[0045] One end passes through the first housing and extends into the inside of the cylindrical output fiber optic connector, while the other end is located outside the first housing as a protective lens mount.

[0046] A protective mirror is positioned coaxially with the protective mirror mount and the coupling convex lens; and

[0047] A magnetic sheet located between the first housing and the second housing.

[0048] In the above technical solution, the fiber laser coupler provided by the present invention, which enables real-time detection of optical fibers, has the following beneficial effects:

[0049] The fiber laser coupler of the present invention can couple two independent optical fibers with a diameter of less than 200 μm and can provide timely feedback on the working status of the laser, so that the optical fibers connected at both ends of the coupling head can be independently plugged in, unplugged and replaced, while maintaining excellent optical performance and mechanical stability. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0051] Figure 1 This is a schematic diagram of the structure of a fiber laser coupler capable of real-time fiber detection provided in an embodiment of the present invention;

[0052] Figure 2 This is a cross-sectional view of the connection structure between the coupling head and the coupler base of a fiber laser coupler capable of real-time fiber detection, provided in an embodiment of the present invention.

[0053] Figure 3 An exploded view of the coupling head of a fiber laser coupler capable of real-time fiber detection, provided in an embodiment of the present invention.

[0054] Figure 4 This is a cross-sectional view of the coupling head of a fiber laser coupler capable of real-time fiber detection provided in an embodiment of the present invention;

[0055] Figure 5 A schematic diagram of the optical shutter assembly of a fiber laser coupler capable of real-time fiber detection provided in an embodiment of the present invention;

[0056] Figure 6 The main view of the mating structure of the coupling output end component and the coupling head of the fiber laser coupler that enables real-time fiber detection provided in an embodiment of the present invention;

[0057] Figure 7 A side view of the mating structure of the coupling output end assembly and coupling head of a fiber laser coupler capable of real-time fiber detection provided in an embodiment of the present invention;

[0058] Figure 8 A schematic diagram of the sensing and protection integrated component of a fiber laser coupler capable of real-time fiber detection provided in an embodiment of the present invention;

[0059] Figure 9 This is a diagram showing the arrangement of optical coupler elements in a sensing and protection integrated component of a fiber laser coupler capable of real-time fiber detection, provided in an embodiment of the present invention.

[0060] Explanation of reference numerals in the attached figures:

[0061] 1. Coupler head; 2. Coupler output assembly; 3. Coupler input assembly; 4. Coupler base; 5. Sensing and protection integrated assembly; 6. Optical shutter assembly;

[0062] 101. Coupler head body; 102. Top cover plate; 103. Lens barrel; 104. Sleeve; 105. Coupler convex lens; 106. High-transmission filter lens;

[0063] 201. Two-dimensional adjustment frame; 202. Cylindrical output end fiber optic connector;

[0064] 20101, Fine-pitch nut sleeve; 20102, Cylindrical head set screw; 20103, Nut; 20104, Compression spring; 20105, Second steel ball; 20106, Circular pad;

[0065] 301. Two-dimensional adjusting flange; 302. Fiber optic connector nut head; 303. Nut ring; 304. Pressure ring; 305. Collimating lens;

[0066] 401. First steel ball; 402. First pad; 403. Second pad; 404. Compression spring; 405. Bolt;

[0067] 501. First outer shell; 502. Second outer shell; 503. Protective goggle structure; 504. Optical coupler transmitting module; 505. Optical coupler receiving module; 506. Optical coupler sensing module;

[0068] 50301, Protective goggle mount; 50302, Protective goggles; 50303, Magnetic sheet;

[0069] 601. Fixed structure of the optical shutter; 602. Rotating electromagnet; 603. Optical coupler baffle; 604. Connector connection end; 605. Connector; 606. Connector teeth; 607. Bushing; 608. Fixed bushing; 609. Optical shutter rotating shaft; 610. Optical coupler plate. Detailed Implementation

[0070] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0071] See Figures 1 to 9 As shown;

[0072] This embodiment discloses a fiber laser coupler capable of real-time fiber detection, the fiber laser coupler comprising:

[0073] Coupler base 4;

[0074] The coupling head 1 is mounted on the coupler base 4. One end of the coupling head 1 is equipped with a coupling input terminal assembly 3, and the other end is equipped with a coupling output terminal assembly 2.

[0075] A shutter assembly 6 is provided on the side of the coupling head 1 and near the coupling output end assembly 2. The shutter assembly 6 is used to control the opening and closing of the laser channel inside the coupling head 1.

[0076] The coupling output end component 2 of the coupling head 1 integrates a sensing and protection integrated component 5. The sensing and protection integrated component 5 integrates an optical coupler transmitting module 504 and an optical coupler receiving module 505. The optical coupler transmitting module 504 and the optical coupler receiving module 505 cooperate to detect the insertion and removal of the optical fiber from the coupling output end component 2. The optical coupler receiving module 505 converts the optical signal into an electrical signal and sends it to the control end.

[0077] The sensing and protection integrated component 5 also integrates an optical coupler sensing module 506. The optical coupler sensing module 506 is used to receive light refracted or reflected by the damaged surface of the optical fiber, and convert the optical signal into an electrical signal and send it to the control terminal.

[0078] Specifically, this embodiment discloses a fiber laser coupler capable of real-time fiber detection. The fiber laser coupler in this embodiment uses a coupler base 4 as a carrier. A coupling head 1, a coupling output component 2, and an optical shutter component 6 are respectively arranged at corresponding positions on the coupler base 4. Simultaneously, a coupling input component 3 is integrated on the input side of the coupling head 1, and a sensing and protection integrated component 5 is arranged on the coupling output component 2. Addressing the problems in the prior art, the sensing and protection integrated component 5 in this embodiment integrates an optical coupler transmitting module 504, an optical coupler receiving module 505, and an optical coupler sensing module 506. The optical coupler transmitting module 504 and the optical coupler receiving module 505 are used in pairs to detect the insertion and removal of the optical fiber from the coupling output component 2. The optical coupler sensing module 506 receives light refracted or reflected from the damaged surface of the optical fiber, converts the optical signal into an electrical signal, and sends it to the control terminal. Furthermore, this embodiment also designs an optical shutter component for controlling the opening and closing of other laser channels.

[0079] Referring to Figure 2, preferably, in this embodiment, the lower part of the coupling head 1 near the coupling input terminal component 3 is machined with a threaded hole, and the position of the coupler base 4 that mates with the threaded hole is machined with a mounting hole.

[0080] A compression spring 404 is installed in the threaded hole and the mounting hole, and the coupler base 4 and the coupling head 1 are connected by bolts 405;

[0081] The threaded hole has circular grooves on both sides, and a first steel ball 401 is placed in the circular groove. The upper and lower parts of the first steel ball 401 are positioned by pads embedded in the corresponding circular grooves.

[0082] First, this embodiment further defines the connection structure between the coupling head 1 and the coupler base 4. In this embodiment, the bottom of the tail end of the coupling head body 101 is provided with a threaded hole and a compression spring 404 is placed therein. The coupling head body 101 and the coupler base 4 are connected by a bolt 405 passing through the compression spring 404. At the same time, circular grooves are machined on both sides of the threaded hole in this embodiment, and a first steel ball 401 is placed in the circular groove. Meanwhile, a pad is used to position and install the first steel ball 401. The pad in this embodiment is divided into two types according to the machining shape of the circular groove: a first pad 402 and a second pad 403.

[0083] See Figures 3 to 4 As shown, preferably, the coupling head 1 in this embodiment includes:

[0084] The coupling head body 101 has a rectangular parallelepiped structure, and the interior of the coupling head body 101 is formed into a cavity.

[0085] The upper cover plate 102 is installed on the upper end of the coupling head body 101, and the bottom surface of the upper cover plate 102 has a right-angled triangular protrusion structure protruding towards the cavity interior of the coupling head body 101.

[0086] The right-angled triangular protrusion structure has a laser channel inside, and both right-angled sides of the right-angled triangular protrusion structure are machined with grooves for embedding high-transmittance filter lenses 106. Two high-transmittance filter lenses 106 with coatings are arranged at a 90° angle through the two right-angled sides.

[0087] The coupling head body 101 is connected to the coupling output end assembly 2 at one end, and a lens barrel 103 is connected to the end of the lens barrel 103 through a sleeve 104. A coupling convex lens 105 is installed at the end of the lens barrel 103.

[0088] This embodiment further defines the structure of the coupling head 1. First, the coupling head 1 is fixed to the corresponding slot of the coupler base 4 via the coupling head body 101. Two high-transmittance filter lenses 106 with coatings are installed through the right-angled triangular protrusion structure of the upper cover plate 102. The two high-transmittance filter lenses 106 with coatings are arranged at 90° by the two right-angled sides of the right-angled triangular protrusion structure.

[0089] Angle. At this point, the space inside the right-angled triangular convex structure is the passage for the laser beam. In this embodiment, the coated high-transmittance filter 106 has high transmittance for the required wavelength of light and high cutoff for specific wavelengths. The two high-transmittance filter lenses 106 are at 90° to filter other wavelengths of pump laser light input from the laser source. The use of two high-transmittance filter lenses 106 is mainly because one high-transmittance filter lens 106 cannot completely cut off a specific wavelength. Therefore, two high-transmittance filter lenses 106 are arranged to prevent the optical axis from shifting.

[0090] See Figure 3 and Figure 4 As shown, the coupling input terminal component 3 in this embodiment includes:

[0091] A two-dimensional adjustment flange 301 is installed at the end of the coupling head body 101. Inside the two-dimensional adjustment flange 301, a collimating lens 305 is positioned and fixed by a collimating lens pressure ring 304.

[0092] The fiber optic connection nut head 302 is threaded into the two-dimensional adjusting flange 301, and a nut ring 303 is provided at the connection between the fiber optic connection nut head 302 and the two-dimensional adjusting flange 301.

[0093] In this embodiment, one end of the coupling head 1 is the input coupling end. The coupling input end assembly 3 in this embodiment is based on a two-dimensional adjustment flange 301. Inside the flange, a collimating lens 305 is fixed by a pressure ring 304. An optical fiber connection nut head 302 is threaded to the outer end of the two-dimensional adjustment flange 301. The distance between the end face of the optical fiber connection nut head 302 and the collimating lens 305 is adjusted by the threaded connection between the optical fiber connection nut head 302 and the two-dimensional adjustment flange 301. After adjustment, it is fixed by locking it in the reverse direction by the nut ring 303.

[0094] The device in this embodiment can focus the scattered laser light input from one end of the optical fiber of the coupling input component 3 into a parallel beam through the collimating lens 305, and filter out other wavelengths of light waves in the beam through the high-transmittance filter lens 106, while ensuring that the light is transmitted linearly.

[0095] Preferably, the side of the coupling head body 101 in this embodiment is machined with a circular deep hole, and the light shutter assembly 6 is installed in the circular deep hole of the coupling head body 101.

[0096] See Figure 5 As shown, the light shutter assembly 6 in this embodiment includes:

[0097] The optical shutter fixing structure 601 is fixed to the coupler base 4, and the optical shutter fixing structure 601 is provided with an optical coupler plate 610;

[0098] A rotating electromagnet 602 is installed on the optical shutter fixing structure 601, and an optical coupler baffle 603 that can rotate with the rotating electromagnet 602 is installed at the end of the rotating electromagnet 602, and one end of the optical coupler baffle 603 extends outward to form a blocking part.

[0099] The light shutter assembly 6 also includes:

[0100] The optical shutter rotating shaft 609 is installed inside the coupling head 1 via the fixed bushing 608 and bushing 607. The optical shutter rotating shaft 609 is provided with an optical shutter plate that rotates with the optical shutter rotating shaft 609. The optical shutter plate is used to block the laser beam at a specific angle.

[0101] The shutter rotation shaft 609 is connected to the rotary electromagnet 602 via connector 605, and the rotary electromagnet 602 drives the shutter rotation shaft 609 to rotate.

[0102] When the shutter rotation shaft 609 drives the shutter plate to block the laser beam, the blocking part of the optical coupler baffle 603 rotates into the optical coupler plate 610 and blocks the optical coupler to cut off the signal received by the optical coupler.

[0103] This embodiment further defines the structure of the shutter assembly 6. The shutter fixing structure 601 is fixed to the corresponding slot in the coupler base 4, and integrates the aforementioned rotating electromagnet 602 and optical coupler plate 610. In this embodiment, the rotating electromagnet 602 is connected to the shutter rotating shaft 609 integrated inside the coupling head 1 via a connector 605. The connector 605 is a conventional structure in the prior art. The shutter rotating shaft 609 is disposed inside the coupling head 1 using a fixed bushing 608 and a bushing 607, and is connected to one end of the connector 605 via a connector insert 606. The other end of the connector 605 in this embodiment is connected to the rotating electromagnet 602, thus forming a transmission between the rotating electromagnet 602 and the shutter rotating shaft 609. Furthermore, in this embodiment, a shutter plate is provided on the shutter rotating shaft 609, and an optical coupler baffle 603 is provided on the rotating electromagnet 602.

[0104] During operation, when the rotating electromagnet 602 receives a command signal, it can rotate at a certain angle and maintain that angle. Simultaneously, it drives the optical shutter rotating shaft 609 to rotate through the connector 605. After the optical shutter plate on the optical shutter rotating shaft 609 rotates to a certain angle, it blocks the laser beam. At the same time, when the optical coupler baffle 603, which rotates synchronously with the rotating electromagnet 602, reaches the designated position, it blocks the optical coupler on the optical coupler plate 610 on the side wall of the optical shutter fixing structure 601, cuts off the optical coupler receiving signal, and determines that the optical shutter plate has successfully blocked the laser beam.

[0105] See Figure 6 As shown, preferably, the coupling output terminal assembly 2 of this embodiment includes a two-dimensional adjustment frame 201 installed at the end of the coupling head body 101, and a cylindrical output terminal fiber optic connector 202 fixed at the end of the two-dimensional adjustment frame 201.

[0106] The lens tube 103 extends into the cylindrical output end fiber optic connector 202 along the axial direction of the cylindrical output end fiber optic connector 202.

[0107] See Figure 7 As shown, more preferably, the two-dimensional adjustment frame 201 of this embodiment is provided with fine-tooth nut sleeves 20101 in both the X and Y directions, and a cylindrical head set screw 20102 is installed inside the fine-tooth nut sleeves 20101.

[0108] A nut 20103 located on the lower side of the two-dimensional adjustment frame 201 is provided along the diagonal direction of the angle between the two cylindrical head screws 20102. A pressure spring 20104 is encapsulated inside the two-dimensional adjustment frame 201 through the nut 20103, and a second steel ball 20105 is provided at one end of the inner side of the pressure spring 20104.

[0109] A circular pad 20106 is provided at the mating position of the coupling head body 101, the cylindrical head set screw 20102, and the second steel ball 20105.

[0110] In this embodiment, the front end of the coupling head body 101 extends into the two-dimensional adjustment frame 201, and its position is adjusted by the cylindrical head set screw 20102 of the two-dimensional adjustment frame 201, so that the laser output from the lens tube 103 is coaxial with the end face of the cylindrical output end fiber optic connector 202.

[0111] Preferably, in this embodiment, the front end of the cylindrical output fiber optic connector 202 is provided with a sensing and protection integrated component 5;

[0112] See Figure 8 and Figure 9 As shown, the sensing and protection integrated component 5 in this embodiment includes:

[0113] The first outer shell 501 and the second outer shell 502 are fixed to the cylindrical output end fiber optic connector 202 by a set screw. The end of the cylindrical output end fiber optic connector 202 extends from the first outer shell 501 to the outside.

[0114] The first housing 501 integrates an optocoupler transmitting module 504, an optocoupler receiving module 505, and an optocoupler sensing module 506. The optocoupler transmitting module 504, the optocoupler receiving module 505, and the optocoupler sensing module 506 are all Sharp GP1A52HRJ00F optocouplers.

[0115] Secondly, a protective mirror structure 503 is installed at the lower part of the first outer shell 501 in this embodiment;

[0116] The protective mirror structure 503 includes: a protective mirror base 50301 with one end passing through the first housing 501 and extending into the interior of the cylindrical output fiber optic connector 202, and the other end located outside the first housing 501; a protective mirror 50302 disposed on the protective mirror base 50301 and the coupling convex lens 105 in a coaxial position; and a magnetic sheet 50303 located between the first housing 501 and the second housing 502.

[0117] The protective lens structure 503 in this embodiment is a replaceable component and can be pulled out and replaced within the housing. The protective lens structure 503 in this embodiment is a convenient, detachable lens that does not affect light transmission. It isolates the optical fiber from the coupling convex lens 105, preventing damage to the coupling convex lens 105 from debris or other foreign objects caused by fiber end-face breakage. The protective lens structure 503 can fit tightly with the housing, and a magnetic plate 50303 is provided on the back, allowing for attraction and positioning with the magnetic plate 50303 inside the housing.

[0118] In this embodiment, the optical coupler transmitting module 504 and the optical coupler receiving module 505 are used in pairs. Once the optical fiber is inserted or removed from the output fiber optic connector, the transmission of light between the optical coupler transmitting module 504 and the optical coupler receiving module 505 can be blocked or allowed to pass. At the same time, the optical coupler receiving module 505 can convert the optical signal into an electrical signal and send it to the control terminal to determine the working status of whether the optical fiber is inserted.

[0119] Secondly, when the optical fiber end face is damaged, the laser beam it receives will be refracted or reflected at the optical fiber end face. The reflected light will be reflected back into the cylindrical output end wall and received by the optical coupler sensing module 506 through the circular hole on the output end optical fiber connector. At the same time, the optical coupler sensing module 506 converts the optical signal into an electrical signal and sends it to the control terminal, and finally feeds back the fault information to the user.

[0120] In the above technical solution, the fiber laser coupler provided by the present invention, which enables real-time detection of optical fibers, has the following beneficial effects:

[0121] The fiber laser coupler of the present invention can couple two independent optical fibers with a diameter of less than 200 μm and can provide timely feedback on the working status of the laser, so that the optical fibers connected at both ends of the coupling head can be independently plugged in, unplugged and replaced, while maintaining excellent optical performance and mechanical stability.

[0122] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fiber laser coupler capable of real-time fiber detection, characterized in that, The fiber laser coupler includes: Coupler base (4); The coupling head (1) is assembled on the coupler base (4), with a coupling input terminal assembly (3) installed at one end and a coupling output terminal assembly (2) installed at the other end; A shutter assembly (6) is provided on the side of the coupling head (1) and near the coupling output end assembly (2). The shutter assembly (6) is used to control the opening and closing of the laser channel in the coupling head (1). The coupling output end component (2) of the coupling head (1) integrates a sensing and protection integrated component (5). The sensing and protection integrated component (5) integrates an optical coupler transmitting module (504) and an optical coupler receiving module (505). The optical coupler transmitting module (504) and the optical coupler receiving module (505) work together to detect the insertion and removal of the optical fiber from the coupling output end component (2). The optical coupler receiving module (505) converts the optical signal into an electrical signal and sends it to the control terminal. The sensing and protection integrated component (5) also integrates an optical coupler sensing module (506), which is used to receive light refracted or reflected by the damaged surface of the optical fiber, and convert the optical signal into an electrical signal and send it to the control terminal.

2. The fiber laser coupler capable of real-time fiber detection according to claim 1, characterized in that, The lower part of the coupling head (1) near the coupling input terminal assembly (3) is machined with a threaded hole, and the position of the coupler base (4) that mates with the threaded hole is machined with a mounting hole; A compression spring (404) is installed in the threaded hole and the mounting hole, and the coupler base (4) and the coupling head (1) are connected by bolts (405); The threaded hole has circular grooves on both sides, and a first steel ball (401) is placed in the circular groove. The upper and lower parts of the first steel ball (401) are positioned by pads embedded in the corresponding circular grooves.

3. The fiber laser coupler capable of real-time fiber detection according to claim 1, characterized in that, The coupling head (1) includes: The coupling head body (101) has a rectangular parallelepiped structure, and the interior of the coupling head body (101) is formed into a cavity; An upper cover plate (102) is installed on the upper end of the coupling head body (101), and the bottom surface of the upper cover plate (102) has a right-angled triangular protrusion structure protruding towards the cavity interior of the coupling head body (101); The right-angled triangular protrusion structure has a laser channel inside, and both right-angled sides of the right-angled triangular protrusion structure are processed with grooves for embedding high-transmittance filter lenses (106). The two high-transmittance filter lenses (106) with coating are arranged at a 90° angle through the two right-angled sides. The coupling head body (101) is connected to the coupling output end assembly (2) at one end with a lens barrel (103), and the end of the lens barrel (103) is fitted with a coupling convex lens (105) through a sleeve (104).

4. The fiber laser coupler capable of real-time fiber detection according to claim 3, characterized in that, The coupling input terminal component (3) includes: The two-dimensional adjustment flange (301) is installed at the end of the coupling head body (101), and the collimating lens (305) is positioned and fixed inside the two-dimensional adjustment flange (301) by the collimating lens pressure ring (304); The fiber optic connection nut head (302) is threaded into the two-dimensional adjusting flange (301), and a nut ring (303) is provided at the connection between the fiber optic connection nut head (302) and the two-dimensional adjusting flange (301).

5. The fiber laser coupler capable of real-time fiber detection according to claim 3, characterized in that, The side of the coupling head body (101) is machined with a circular deep hole, and the optical shutter assembly (6) is installed in the circular deep hole of the coupling head body (101). The light shutter assembly (6) includes: A shutter fixing structure (601) is fixed to the coupler base (4), and the shutter fixing structure (601) is provided with a shutter plate (610); A rotating electromagnet (602) is installed on the optical shutter fixing structure (601), and an optical coupler baffle (603) that can rotate with the rotating electromagnet (602) is installed at the end of the rotating electromagnet (602), and one end of the optical coupler baffle (603) extends outward to form a blocking part. The light shutter assembly (6) also includes: A shutter rotating shaft (609) is installed inside the coupling head (1) via a fixed bushing (608) and a bushing (607). A shutter plate is provided on the shutter rotating shaft (609) to rotate with the shutter rotating shaft (609). The shutter plate is used to block the laser beam at a specific angle. The shutter rotating shaft (609) is connected to the rotating electromagnet (602) via a connector (605), and the rotating electromagnet (602) drives the shutter rotating shaft (609) to rotate. When the optical shutter rotation shaft (609) drives the optical shutter plate to block the laser beam, the blocking part of the optical coupler baffle (603) rotates into the optical coupler plate (610) and blocks the optical coupler to cut off the optical coupler from receiving the signal.

6. The fiber laser coupler capable of real-time fiber detection according to claim 3, characterized in that, The coupling output assembly (2) includes a two-dimensional adjustment frame (201) installed at the end of the coupling head body (101) and a cylindrical output fiber optic connector (202) fixed at the end of the two-dimensional adjustment frame (201). The lens tube (103) extends into the cylindrical output end fiber optic connector (202) along the axial direction of the cylindrical output end fiber optic connector (202).

7. The fiber laser coupler capable of real-time fiber detection according to claim 6, characterized in that, The two-dimensional adjustment frame (201) is provided with fine-tooth nut sleeves (20101) in both the X and Y directions, and a cylindrical head set screw (20102) is installed inside the fine-tooth nut sleeves (20101). The two-dimensional adjustment frame (201) is provided with a nut (20103) located below the side of the two-dimensional adjustment frame (201) along the diagonal direction of the angle between the two cylindrical head screws (20102). A pressure spring (20104) is encapsulated inside the two-dimensional adjustment frame (201) through the nut (20103), and a second steel ball (20105) is provided at one end of the inner side of the pressure spring (20104). Circular pads (20106) are provided at the mating positions of the coupling head body (101) with the cylindrical head set screw (20102) and the second steel ball (20105).

8. The fiber laser coupler capable of real-time fiber detection according to claim 6, characterized in that, The sensing and protection integrated component (5) is provided at the front end of the cylindrical output fiber optic connector (202); The sensing and protection integrated component (5) includes: A first outer shell (501) and a second outer shell (502), wherein the second outer shell (502) is positioned and fixed to the cylindrical output end fiber optic connector (202) by a set screw, and the end of the cylindrical output end fiber optic connector (202) extends from the first outer shell (501) to the outside; The first housing (501) integrates the optical coupler transmitting module (504), the optical coupler receiving module (505), and the optical coupler sensing module (506).

9. The fiber laser coupler capable of real-time fiber detection according to claim 8, characterized in that, A protective mirror structure (503) is installed at the lower part of the first outer shell (501); The protective goggle structure (503) includes: A protective lens mount (50301) with one end passing through the first housing (501) and extending into the interior of the cylindrical output fiber optic connector (202) and the other end located outside the first housing (501); A protective mirror (50302) is disposed on the same axis as the protective mirror mount (50301) and the coupling convex lens (105); and A magnetic sheet (50303) is located between the first housing (501) and the second housing (502).

Images