A dual-wavelength laser integrated machine

Abstract

This invention discloses a dual-wavelength laser integrated machine, comprising: a first laser generating structure, a second laser generating structure, a coupling output structure, a controller, and a laser switching device; the first and second laser generating structures are electrically connected to the laser switching device, and the laser switching device is electrically connected to the controller; the first laser generating structure outputs a first laser, and the second laser generating structure outputs a second laser; the coupling output structure includes a dichroic mirror, the first laser is reflected by the dichroic mirror, and the second laser is transmitted through the dichroic mirror and propagates in the same direction. By incorporating a dichroic mirror, this invention enables coaxial coupling output of two lasers of different wavelengths using a simple technical approach and low-cost optical components. Combined with the laser switching device, it allows for rapid and flexible switching between two laser sources in clinical practice without the need to externally change the laser source interface, thus meeting convenient clinical needs.

Description

Technical Field

[0001] This utility model relates to the field of laser lithotripsy technology, and in particular to a dual-wavelength laser integrated machine. Background Technology

[0002] In the field of laser lithotripsy, holmium lasers are currently the gold standard in clinical practice. With the development of fiber optic technology, thulium-doped laser technology has also matured. Because its laser wavelength is at the peak of water absorption, it is increasingly being used in the medical field, and there are attempts to use thulium lasers as a light source for laser lithotripsy. The two types of lasers have their own characteristics in terms of lithotripsy efficiency and tissue action. Holmium lasers have high peak power, which can quickly break up stones, while thulium lasers have high water absorption efficiency, which can effectively pulverize stones. To flexibly utilize the strengths of both lasers in a single treatment, developing an integrated device that combines holmium and thulium lasers has clear clinical value.

[0003] The core challenge in realizing a dual-laser integrated machine lies in how to efficiently and flexibly switch or combine two different laser outputs within the same system. Existing technical solutions, such as fiber optic combining or coherent combining, suffer from problems such as complex device fabrication processes, high system integration difficulty, and high costs.

[0004] Therefore, the industry needs a simpler and more convenient technical solution to enable rapid and reliable switching between holmium lasers and thulium lasers within the device. Utility Model Content

[0005] This invention provides a dual-wavelength laser integrated machine that enables coaxial coupling and output of two different wavelength lasers. In clinical practice, it allows for quick and flexible switching between two laser sources without the need to change the external interface of the laser source, thus meeting convenient clinical needs.

[0006] In a first aspect, the present invention provides a dual-wavelength laser integrated machine, comprising: a first laser generating structure, a second laser generating structure, a coupling output structure, a controller, and a laser switching device;

[0007] The first laser generating structure and the second laser generating structure are electrically connected to the laser switching device, and the laser switching device is electrically connected to the controller.

[0008] The first laser generating structure is used to output a first laser, and the second laser generating structure is used to output a second laser; the coupling output structure includes a dichroic mirror, the first laser is reflected by the dichroic mirror, and the second laser is transmitted through the dichroic mirror and then propagates in the same direction.

[0009] Optionally, the coupling output structure further includes a first laser collimating lens, a second laser collimating lens, and a first laser reflecting mirror;

[0010] The first laser output from the first laser generating structure is collimated by the first laser collimating mirror and then reflected by the first laser reflecting mirror to the dichroic mirror; the second laser output from the second laser generating structure is collimated by the second laser collimating mirror and then directly reaches the dichroic mirror.

[0011] Optionally, the coupling output structure further includes a laser focusing mirror, wherein the first laser is reflected by the dichroic mirror, the second laser is transmitted through the dichroic mirror and then focused by the laser focusing mirror, and the external optical fiber can collect the laser energy at the focusing point and transmit it to the stone location.

[0012] Optionally, the first laser is a thulium laser, and the second laser is a holmium laser.

[0013] Optionally, the first laser generating structure includes a thulium-doped gain fiber, a high-reflection grating, a low-reflection grating, and a pump source;

[0014] The low-reflection grating and the high-reflection grating are arranged opposite each other to form a laser resonant cavity, and at least a portion of the thulium-doped gain fiber is located within the laser resonant cavity; the pump source is connected to the thulium-doped gain fiber and is used to pump the thulium-doped gain fiber.

[0015] Optionally, the first laser generating structure further includes a forward combiner and / or a reverse combiner, wherein the forward combiner is located on the side where the high-reflection grating is provided, and the reverse combiner is located on the side where the low-reflection grating is provided. The forward combiner and the reverse combiner are respectively used to combine the light emitted from at least two of the pump sources into the thulium-doped gain fiber.

[0016] Optionally, the first laser generating structure further includes a cladding light filter, which is used to filter out residual pump light from the cladding of the thulium-doped gain fiber.

[0017] Optionally, the second laser generating structure includes a pump lamp, a gain crystal rod, a diffuse reflection cavity, a high-reflectivity mirror, and an output mirror;

[0018] The pump lamp and the gain crystal rod are disposed in the diffuse reflection cavity. The energy provided by the pump lamp causes the gain crystal rod to undergo population inversion, generating initial spontaneous emission photons. The initial spontaneous emission photons are reflected back and forth in the resonant cavity composed of the high-reflectivity mirror and the output mirror. Each time they pass through the gain crystal rod, stimulated emission is triggered and amplified, ultimately forming the second laser that is coupled out through the output mirror.

[0019] Optionally, the laser switching device includes a first laser control device, a second laser control device, a first laser emission signal input device, and a second laser emission signal input device;

[0020] The first laser emission signal input device is electrically connected to the first input terminal of the controller, and the second laser emission signal input device is electrically connected to the second input terminal of the controller; the first output terminal of the controller is electrically connected to the first laser control device, and the second output terminal of the controller is electrically connected to the second laser control device.

[0021] Optionally, the first laser emission signal input device includes a left foot pedal, and the second laser emission signal input device includes a right foot pedal.

[0022] This utility model provides a dual-wavelength laser integrated machine, including: a first laser generating structure, a second laser generating structure, a coupling output structure, a controller, and a laser switching device; the first and second laser generating structures are electrically connected to the laser switching device, and the laser switching device is electrically connected to the controller; the first laser generating structure is used to output a first laser, and the second laser generating structure is used to output a second laser; the coupling output structure includes a dichroic mirror, the first laser is reflected by the dichroic mirror, and the second laser is transmitted through the dichroic mirror and propagates in the same direction. By setting the dichroic mirror, coaxial coupling output of two different wavelength lasers can be achieved using a simple technical route and low-cost optical components. Combined with the laser switching device, it allows for rapid and flexible switching between two laser light sources in clinical practice without the need to change the external laser light source interface, thus meeting convenient clinical needs.

[0023] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a dual-wavelength laser integrated machine provided in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of a coupling output structure provided in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of a first laser generating structure provided in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of a second laser generating structure provided in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of a laser switching device provided in an embodiment of this utility model. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] Figure 1 This is a schematic diagram of the structure of a dual-wavelength laser integrated machine provided in an embodiment of this utility model, for reference. Figure 1 The dual-wavelength laser integrated machine includes: a first laser generating structure 100, a second laser generating structure 200, a coupling output structure 300, a controller 400, and a laser switching device 500; the first laser generating structure 100 and the second laser generating structure 200 are electrically connected to the laser switching device 500, and the laser switching device 500 is electrically connected to the controller 400; the first laser generating structure 100 is used to output a first laser A, and the second laser generating structure 200 is used to output a second laser B; the coupling output structure 300 includes a dichroic mirror 301, the first laser A is reflected by the dichroic mirror 301, and the second laser B is transmitted through the dichroic mirror 301 and propagates in the same direction.

[0033] It should be noted that the dichroic mirror 301 can selectively reflect and transmit light of a specific wavelength using the principle of thin-film interference. In this embodiment, the dichroic mirror 301 is configured to reflect the first laser A and transmit the second laser B, thereby causing the first laser A and the second laser B to propagate in the same direction. The laser switching device 500 can transmit the first laser emission signal or the second laser emission signal input by the user to the controller 400. The controller 400 then controls the laser switching device 500 to drive the first laser generating structure 100 to output the first laser A or to drive the second laser generating structure 200 to output the second laser B. Because the dichroic mirror 301 is used for coupling the output, the cost of the dual-wavelength laser integrated machine provided by this invention is lower than that of the prior art, and the technical approach is simpler.

[0034] This embodiment of the invention, by setting a dichroic mirror 301, enables the coaxial coupling output of two different wavelength lasers using a simple technical approach and low-cost optical devices. Combined with a laser switching device, it allows for rapid and flexible switching between two laser light sources in clinical practice without the need to change the interface of the laser light source externally, thus meeting convenient clinical needs.

[0035] Figure 2 This is a schematic diagram of a coupling output structure provided by an embodiment of the present invention. Optionally, based on the above embodiment, refer to... Figure 2 The coupling output structure 300 also includes a first laser collimating mirror 302, a second laser collimating mirror 303, and a first laser reflecting mirror 304; the first laser A output by the first laser generating structure 100 is collimated by the first laser collimating mirror 302 and then reflected by the first laser reflecting mirror 304 to the dichroic mirror 301; the second laser B output by the second laser generating structure 200 is collimated by the second laser collimating mirror 303 and then directly reaches the dichroic mirror 301.

[0036] Optionally, based on the above embodiments, continue to refer to... Figure 2 The coupling output structure 300 also includes a laser focusing mirror 305. The first laser A is reflected by the dichroic mirror 301, and the second laser B is transmitted through the dichroic mirror 301 and then focused by the laser focusing mirror 305.

[0037] It is understood that the coupling output structure 300 in this embodiment is only an example. The structure of the coupling output structure 300 can be freely adjusted so that the first laser A is reflected by the dichroic mirror 301 and the second laser B is transmitted through the dichroic mirror 301 and then propagates in the same direction.

[0038] Optionally, based on the above embodiments, the first laser A is a thulium laser and the second laser B is a holmium laser.

[0039] It's important to note that both thulium and holmium lasers are primarily used for lithotripsy and surgical procedures in urology. Their key difference lies in the different rare-earth element ions doped in the gain medium, leading to a fundamental difference in output wavelength. Thulium lasers have wavelengths around 2.0 μm, commonly 1.94 μm or 2.01 μm. Holmium lasers have wavelengths around 2.1 μm, most commonly 2.12 μm. Because the 1.94 μm wavelength is closer to the absorption peak of water, thulium laser energy is absorbed extremely efficiently by water molecules in tissue, producing a strong vaporization effect. The energy is rapidly absorbed at the tissue surface, resulting in high cutting precision and a small thermal damage area, making it ideal for delicate soft tissue cutting and vaporization (such as prostatectomy). Thulium lasers often operate in continuous wave mode, providing smooth and efficient cutting capabilities, and can also pulverize stones into extremely small particles that the body can naturally expel. Holmium lasers typically operate in pulsed mode, producing extremely high peak power. When a pulsed laser is applied to a kidney stone, the energy is absorbed by water molecules on the stone's surface, instantly creating a "micro-explosion" (photoacoustic effect), which pulverizes the stone.

[0040] This invention, by setting a dichroic mirror 301, enables the coaxial coupling output of thulium and holmium lasers using a simple technical approach and low-cost optical components. Combined with a laser switching device, it allows for rapid and flexible switching between thulium and holmium lasers in clinical practice without the need to change the external laser source interface, thus meeting convenient clinical needs.

[0041] Figure 3 This is a schematic diagram of a first laser generating structure provided in an embodiment of the present invention. Optionally, based on the above embodiment, refer to... Figure 3 The first laser generating structure 100 includes a thulium-doped gain fiber 101, a high-reflection grating 102, a low-reflection grating 103, and a pump source 104; the low-reflection grating 103 and the high-reflection grating 102 are arranged opposite to each other to form a laser resonant cavity 108, and at least a portion of the thulium-doped gain fiber 101 is located inside the laser resonant cavity 108; the pump source 104 is connected to the thulium-doped gain fiber 101 and is used to pump the thulium-doped gain fiber 101.

[0042] Optionally, based on the above embodiments, continue to refer to... Figure 3 The first laser generating structure 100 further includes a forward beam combiner 105 and / or a reverse beam combiner 106. The forward beam combiner 105 is located on the side with a high-reflection grating 102, and the reverse beam combiner 106 is located on the side with a low-reflection grating 103. The forward beam combiner 105 and the reverse beam combiner 106 are used to combine the light beams emitted by at least two pump sources 104 into the thulium-doped gain fiber 101.

[0043] Optionally, based on the above embodiments, continue to refer to... Figure 3 The first laser generating structure 100 also includes a cladding light filter 107, which is used to filter out the residual pump light in the cladding of the thulium-doped gain fiber 101.

[0044] It is understood that the first laser generating structure 100 in this embodiment is only an example. The first laser generating structure 100 can be freely adjusted as long as it can generate the first laser A.

[0045] Figure 4 This is a schematic diagram of a second laser generating structure provided in an embodiment of the present invention. Optionally, based on the above embodiment, refer to... Figure 4 The second laser generating structure 200 includes a pump lamp 202, a gain crystal rod 203, a diffuse reflection cavity 201, a high-reflectivity mirror 204, and an output mirror 205; the pump lamp 202 and the gain crystal rod 203 are disposed within the diffuse reflection cavity 201. Figure 4 The pump lamp 202 and gain crystal rod 202 shown are only for illustrating the approximate structure of the pump lamp 202 and gain crystal rod 203 and do not represent the actual positional relationship between the pump lamp 202 and gain crystal rod 203 and the diffuse reflection cavity 201. The energy provided by the pump lamp 202 causes population inversion in the gain crystal rod 203, generating initial spontaneous emission photons. The initial spontaneous emission photons are reflected back and forth in the resonant cavity composed of the high-reflection mirror 204 and the output mirror 205. Each time they pass through the gain crystal rod 203, stimulated emission is triggered and amplified, eventually forming the second laser B, which is coupled out through the output mirror 205.

[0046] It is understood that the second laser generating structure 200 in this embodiment is only an example. The second laser generating structure 200 can be freely adjusted as long as it can generate the second laser B.

[0047] Figure 5 This is a schematic diagram of the structure of a laser switching device provided in an embodiment of the present invention. Optionally, based on the above embodiment, refer to... Figure 5 The laser switching device 500 includes a first laser control device 501, a second laser control device 502, a first laser emission signal input device 503, and a second laser emission signal input device 504; the first laser emission signal input device 503 is electrically connected to the first input terminal of the controller 400, and the second laser emission signal input device 504 is electrically connected to the second input terminal of the controller 400; the first output terminal of the controller 400 is electrically connected to the first laser control device 501, and the second output terminal of the controller 400 is electrically connected to the second laser control device 502.

[0048] It should be noted that the first laser emission signal input device 503 can transmit the first laser emission signal input by the user to the controller 400, and the second laser emission signal input device 504 can transmit the second laser emission signal input by the user to the controller 400. The controller 400 controls the first laser control device 501 or the second laser control device 502 according to the received laser emission signal to drive the first laser generating structure 100 to output the first laser A, or to drive the second laser generating structure 200 to output the second laser B.

[0049] Optionally, based on the above embodiments, the first laser emission signal input device 503 includes a left foot pedal, and the second laser emission signal input device 504 includes a right foot pedal.

[0050] It is understandable that the first laser emission signal could be the signal of the left foot pedal being pressed, and the second laser emission signal could be the signal of the right foot pedal being pressed.

[0051] This embodiment of the invention includes a first laser emission signal input device 503 with a left foot pedal and a second laser emission signal input device 504 with a right foot pedal. After the user adjusts the parameters of the holmium laser and thulium laser suitable for the current surgery, pressing the right foot pedal emits the holmium laser, and pressing the left foot pedal emits the thulium laser.

[0052] In summary, this invention, by incorporating a dichroic mirror 301, enables coaxial coupling output of two lasers of different wavelengths using a simple technical approach and low-cost optical components. Combined with a laser switching device, it allows for rapid and flexible switching between two laser light sources in clinical practice without the need to externally change the laser source interface, thus meeting convenient clinical needs. Furthermore, since the first laser A is a thulium laser and the second laser B is a holmium laser, a single-button switch between the holmium and thulium laser light sources can be achieved using a pedal, significantly saving surgical time while ensuring optimal medical outcomes.

[0053] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A dual-wavelength laser integrated machine, characterized in that, include: The system comprises a first laser generating structure, a second laser generating structure, a coupling output structure, a controller, and a laser switching device. The first laser generating structure and the second laser generating structure are electrically connected to the laser switching device, and the laser switching device is electrically connected to the controller. The first laser generating structure is used to output a first laser, and the second laser generating structure is used to output a second laser; the coupling output structure includes a dichroic mirror, the first laser is reflected by the dichroic mirror, and the second laser is transmitted through the dichroic mirror and then propagates in the same direction.

2. The dual-wavelength laser integrated machine according to claim 1, characterized in that, The coupling output structure also includes a first laser collimating mirror, a second laser collimating mirror, and a first laser reflecting mirror; The first laser output from the first laser generating structure is collimated by the first laser collimating mirror and then reflected by the first laser reflecting mirror to the dichroic mirror; the second laser output from the second laser generating structure is collimated by the second laser collimating mirror and then directly reaches the dichroic mirror.

3. The dual-wavelength laser integrated machine according to claim 2, characterized in that, The coupling output structure further includes a laser focusing mirror, wherein the first laser is reflected by the dichroic mirror, and the second laser is transmitted through the dichroic mirror and then focused by the laser focusing mirror.

4. The dual-wavelength laser integrated machine according to claim 1, characterized in that, The first laser is a thulium laser, and the second laser is a holmium laser.

5. The dual-wavelength laser integrated machine according to claim 4, characterized in that, The first laser generation structure includes a thulium-doped gain fiber, a high-reflection grating, a low-reflection grating, and a pump source; The low-reflection grating and the high-reflection grating are arranged opposite each other to form a laser resonant cavity, and at least a portion of the thulium-doped gain fiber is located within the laser resonant cavity; the pump source is connected to the thulium-doped gain fiber and is used to pump the thulium-doped gain fiber.

6. The dual-wavelength laser integrated machine according to claim 5, characterized in that, The first laser generating structure further includes a forward beam combiner and / or a reverse beam combiner. The forward beam combiner is located on the side where the high-reflection grating is provided, and the reverse beam combiner is located on the side where the low-reflection grating is provided. The forward beam combiner and the reverse beam combiner are respectively used to combine the light emitted from at least two of the pump sources into the thulium-doped gain fiber.

7. The dual-wavelength laser integrated machine according to claim 6, characterized in that, The first laser generating structure further includes a cladding light filter, which is used to filter out residual pump light from the cladding of the thulium-doped gain fiber.

8. The dual-wavelength laser integrated machine according to claim 4, characterized in that, The second laser generating structure includes a pump lamp, a gain crystal rod, a diffuse reflection cavity, a high-reflectivity mirror, and an output mirror; The pump lamp and the gain crystal rod are disposed in the diffuse reflection cavity. The energy provided by the pump lamp causes the gain crystal rod to undergo population inversion, generating initial spontaneous emission photons. The initial spontaneous emission photons are reflected back and forth in the resonant cavity composed of the high-reflectivity mirror and the output mirror. Each time they pass through the gain crystal rod, stimulated emission is triggered and amplified, ultimately forming the second laser that is coupled out through the output mirror.

9. The dual-wavelength laser integrated machine according to claim 1, characterized in that, The laser switching device includes a first laser control device, a second laser control device, a first laser emission signal input device, and a second laser emission signal input device; The first laser emission signal input device is electrically connected to the first input terminal of the controller, and the second laser emission signal input device is electrically connected to the second input terminal of the controller; the first output terminal of the controller is electrically connected to the first laser control device, and the second output terminal of the controller is electrically connected to the second laser control device.

10. The dual-wavelength laser integrated machine according to claim 9, characterized in that, The first laser emission signal input device includes a left foot pedal, and the second laser emission signal input device includes a right foot pedal.

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