Output isolator and laser
By using a frequency doubling isolation component in which a frequency doubler and a Faraday rotator are connected in series in the laser, the problem of complex optical path structure in the laser is solved, and the laser can emit dual-wavelength lasers while reducing costs and energy consumption.
Patent Information
- Application Number
- CN202422998954.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-12-05
AI Technical Summary
The optical path structure used in existing lasers to combine two wavelengths of laser light into one laser beam is complex, resulting in higher laser costs and increased energy consumption.
A frequency doubling isolation component consisting of a frequency doubler and a Faraday rotator connected in series is used to split a laser of one wavelength into two wavelengths through frequency doubling processing, and prevent the return light from returning to the laser, thereby simplifying the optical path structure.
The laser can emit dual-wavelength laser light, reduce the cost and energy consumption of the laser, and prevent the waveform disorder of the resonant cavity.
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Figure CN223347077U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of laser technology, and in particular to an output isolator and a laser. Background Art
[0002] For lasers that output two wavelengths of laser light, two wavelengths of laser light are generally generated inside the laser, and then the two wavelengths of laser light are coupled into one laser beam through an optical path structure. The combined laser light is then output after passing through an output isolator set at the output end of the laser to prevent the return light from returning to the laser and causing waveform disorder in the laser resonant cavity.
[0003] However, the optical path structure used in existing lasers to combine two wavelengths of laser light into one laser beam is relatively complex, resulting in a high cost of the laser. Utility Model Content
[0004] The embodiments of the present application provide an output isolator and a laser, which aim to solve the problem that the optical path structure used to combine two wavelengths of laser light into one laser beam is relatively complex, resulting in a high cost of the laser.
[0005] An embodiment of the present application provides an output isolator, the output isolator including a frequency multiplication isolation component, the frequency multiplication isolation component including:
[0006] A frequency multiplier, used for frequency doubling the laser;
[0007] A Faraday rotator is used to adjust the polarization direction of the laser. The frequency doubler and the Faraday rotator are connected in series on the optical path between the input and output ends of the frequency doubling isolation component, so that the laser input from the input end of the frequency doubling isolation component passes through the frequency doubler and the Faraday rotator and is output from the output end of the frequency doubling isolation component.
[0008] In some embodiments, the frequency multiplier and the Faraday rotator are optically connected in sequence along the direction from the input end to the output end of the frequency multiplication isolation component, so that the frequency multiplier performs frequency multiplication on the laser received at the input end of the frequency multiplication isolation component and transmits it to the Faraday rotator, and then outputs it from the output end of the frequency multiplication isolation component after passing through the Faraday rotator.
[0009] In some embodiments, the output isolator further includes an input light collimating component, the input end of the input light collimating component is used to be optically connected to the output end of the laser emission component, and the output end of the input light collimating component is optically connected to the input end of the frequency doubling isolation component.
[0010] In some embodiments, the input light collimating assembly includes a first collimating lens, the output end of the first collimating lens is optically connected to the input end of the frequency doubling isolation assembly, and the input end of the first collimating lens is used to be optically connected to the output end of the laser emitting assembly.
[0011] In some embodiments, the input light collimating assembly further comprises an optical fiber, one end of the optical fiber being connected to the input optical path of the first collimating lens, and the other end of the optical fiber being connected to the output optical path of the laser emitting assembly.
[0012] In some embodiments, the output isolator further includes a collimating and beam expanding component, the input end of the collimating and beam expanding component is optically connected to the output end of the frequency doubling isolation component, and the collimating and beam expanding component is used to collimate and expand the laser.
[0013] In some embodiments, the collimating and expanding assembly includes a collimating lens and a second collimating lens, the input end of the collimating lens is optically connected to the output end of the frequency doubling isolation assembly, and the output end of the collimating lens is optically connected to the input end of the second collimating lens.
[0014] In some embodiments, the output isolator further includes a housing having a mounting cavity, and the frequency doubling isolation component is mounted in the mounting cavity.
[0015] The embodiment of the present application further provides a laser, the laser comprising the output isolator as described above, the output isolator comprising a frequency doubling isolation component, the frequency doubling isolation component comprising:
[0016] A frequency multiplier, used for frequency doubling the laser;
[0017] A Faraday rotator is used to adjust the polarization direction of the laser. The frequency doubler and the Faraday rotator are connected in series on the optical path between the input and output ends of the frequency doubling isolation component, so that the laser input from the input end of the frequency doubling isolation component passes through the frequency doubler and the Faraday rotator and is output from the output end of the frequency doubling isolation component.
[0018] In some embodiments, the laser further includes a laser emitting component, which is used to emit laser light. The output end of the laser emitting component is optically connected to the input end of the frequency doubling isolation of the output isolator.
[0019] The output isolator provided in the embodiments of the present application connects a frequency multiplier and a Faraday rotator in series in the optical path between the input and output ends of a frequency multiplication isolation component. When a laser beam of a certain wavelength is input from the input end of the frequency multiplication isolation component, the laser beam passes through the frequency multiplier and the Faraday rotator, and then outputs from the output end of the frequency multiplication isolation component. During this process, the frequency multiplier can perform frequency multiplication on the laser beam, so that the laser beam of a certain wavelength is split into two laser beams after passing through the frequency multiplier, and then output from the output end of the frequency multiplication isolation component. In addition, the Faraday rotator can prevent the return light from returning to the frequency multiplier.
[0020] Therefore, when an output isolator is used in a laser, it not only prevents the return light from returning to the laser and causing waveform disturbance in the laser resonator, but also the laser emission component of the laser only needs to emit laser light of one wavelength, which is then divided into two wavelengths by the output isolator. While achieving dual-wavelength laser emission, it does not require a complex optical path structure in the laser to combine the two wavelengths into a single laser beam, which helps reduce the cost of the laser. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.
[0022] Figure 1 A schematic structural diagram of an embodiment of an output isolator provided in an embodiment of the present application;
[0023] Figure 2 This is a schematic structural diagram of another embodiment of the output isolator provided in an embodiment of the present application.
[0024] Laser 1; laser emitting assembly 10; output isolator 20; frequency doubling isolation assembly 21; frequency multiplier 211; Faraday rotator 212; input light collimating assembly 22; first collimating lens 221; optical fiber 222; collimating beam expanding assembly 23; beam expanding lens 231; second collimating lens 232; housing 24; mounting cavity 241. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.
[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.
[0027] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.
[0028] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0029] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.
[0030] A fiber laser uses rare-earth-doped glass fiber as its gain medium. Pump light easily generates high power density within the fiber, causing a population inversion of the laser energy level within the laser's working material. By incorporating a positive feedback loop, this generates laser oscillation output. Fiber lasers are commonly used in industrial processes such as cutting and welding, and have found widespread application in industrial manufacturing, healthcare, military defense, and other fields.
[0031] During laser processing using a laser, in order to prevent the return light from returning to the laser and causing waveform disorder in the laser resonant cavity, an output isolator is usually set at the output end of the laser to isolate the return light and prevent it from returning to the laser.
[0032] For a laser capable of emitting two wavelengths of laser light, two wavelengths of laser light are generally generated within the laser, and then the two wavelengths of laser light are coupled into one laser beam through an optical path structure, and the combined laser light is output after passing through an output isolator provided at the output end of the laser.
[0033] However, the optical path structure used to combine the two wavelengths of laser light into a single beam in existing lasers is relatively complex, resulting in high costs for the optical path structure, and thus high costs for the laser itself. Furthermore, the optical path structure experiences significant losses during the process of coupling the two wavelengths of laser light into a single beam and transmitting it through the optical fiber, increasing the laser's energy consumption.
[0034] To solve at least some of the above technical problems, the present invention provides an output isolator and a laser, which are described in detail below.
[0035] First, an embodiment of the present application provides an output isolator.
[0036] Figure 1 This is a schematic diagram of the structure of an embodiment of the output isolator provided in the embodiment of the present application. Figure 1As shown, the output isolator 20 includes a frequency doubling isolation component 21. The input end of the frequency doubling isolation component 21 is used to communicate with the output end of the laser emitting component 10. The frequency doubling isolation component 21 is used to perform frequency doubling on the laser light emitted by the laser emitting component 10 and then output the laser light from the output end of the frequency doubling isolation component 21. In addition, the frequency doubling isolation component 21 is also used to isolate the return light to prevent the return light from returning to the laser 1 and causing waveform disturbance in the laser 1 resonator cavity.
[0037] In some embodiments, the frequency multiplication isolation component 21 can include a frequency multiplier 211 and a Faraday rotator 212. The frequency multiplication isolation component 21 is configured to perform frequency multiplication on the laser light. The Faraday rotator 212 is configured to adjust the polarization direction of the laser light. The frequency multiplier 211 and the Faraday rotator 212 are connected in series in the optical path between the input and output ends of the frequency multiplication isolation component 21, so that the laser light input to the input end of the frequency multiplication isolation component 21 passes through the frequency multiplier 211 and the Faraday rotator 212 and is then output from the output end of the frequency multiplication isolation component 21.
[0038] The output isolator 20 provided in the embodiment of the present application connects a frequency multiplier 211 and a Faraday rotator 212 in series on the optical path between the input and output ends of the frequency multiplication isolation component 21. When a laser beam of a certain wavelength is input from the input end of the frequency multiplication isolation component 21, the laser beam passes through the frequency multiplier 211 and the Faraday rotator 212, and then outputs from the output end of the frequency multiplication isolation component 21. During this process, the frequency multiplier 211 can perform frequency multiplication on the laser beam, so that the laser beam of a certain wavelength is split into two laser beams of two wavelengths after passing through the frequency multiplier 211 and outputted from the output end of the frequency multiplication isolation component 21. In addition, the Faraday rotator 212 can also prevent the return light from returning to the frequency multiplier 211.
[0039] Therefore, when the output isolator 20 is used in the laser 1, it can not only prevent the reflected light from returning to the laser 1 and causing waveform disturbance in the resonant cavity of the laser 1, but also the laser emitting assembly 10 of the laser 1 only needs to emit laser light of one wavelength, which is then divided into two wavelengths by the output isolator 20. While achieving the dual-wavelength laser emission of the laser 1, there is no need to set up a complex optical path structure in the laser 1 to combine the two wavelengths into one laser beam, which is conducive to reducing the cost of the laser 1.
[0040] In the embodiment of the present application, the frequency multiplier 211 may be a frequency doubling crystal or other optical device capable of splitting laser light of one wavelength into laser light of two wavelengths, which is not limited here.
[0041] In some embodiments, as Figure 1As shown, the frequency multiplier 211 and the Faraday rotator 212 can be optically connected in sequence along the direction from the input end to the output end of the frequency multiplication isolation component 21, so that the frequency multiplier 211 performs frequency multiplication on the laser light received at the input end of the frequency multiplication isolation component 21 and transmits it to the Faraday rotator 212. After passing through the Faraday rotator 212, the laser light is output from the output end of the frequency multiplication isolation component 21. This allows the Faraday rotator 212 to be closer to the output end of the output isolator 20, which helps improve the output isolator 20's ability to block reflected light. The input end of the frequency multiplier 211 is the input end of the frequency multiplication isolation component 21, and the output end of the Faraday rotator 212 is the output end of the frequency multiplication isolation component 21.
[0042] Of course, if Figure 2 As shown, the Faraday rotator 212 and the frequency multiplier 211 can also be optically connected in sequence along the direction from the input end to the output end of the frequency multiplication isolation component 21, so that the laser light received at the input end of the frequency multiplication isolation component 21 is transmitted to the frequency multiplier 211 after being transmitted by the Faraday rotator 212, and then output from the output end of the frequency multiplication isolation component 21 after being processed by the frequency multiplier 211. This can also achieve the effect of separating laser light of one wavelength into laser light of two wavelengths after passing through the output isolator 20. The input end of the Faraday rotator 212 is the input end of the frequency multiplication isolation component 21, and the output end of the frequency multiplier 211 is the output end of the frequency multiplication isolation component 21.
[0043] In some embodiments, as Figure 1 As shown, the output isolator 20 may further include an input light collimating assembly 22, the input end of which is configured to be optically connected to the output end of the laser emitting assembly 10, and the output end of the input light collimating assembly 22 is optically connected to the input end of the frequency doubling isolation assembly 21. Thus, the laser light output from the output end of the laser emitting assembly 10 can first be collimated by the input light collimating assembly 22, thereby allowing the laser light to be more accurately transmitted to the input end of the frequency doubling isolation assembly 21, thereby reducing reflection of the incident laser light by the frequency doubling isolation assembly 21.
[0044] The input light collimating assembly 22 can include a first collimating lens 221. The output end of the first collimating lens 221 is optically connected to the input end of the frequency doubling isolation assembly 21. The input end of the first collimating lens 221 is optically connected to the output end of the laser emitting assembly 10. When the laser light output from the output end of the laser emitting assembly 10 passes through the first collimating lens 221, the laser light is collimated, resulting in a relatively simple structure.
[0045] Continue to refer to Figure 1The input light collimating assembly 22 may further include an optical fiber 222, one end of which is optically connected to the input end of the first collimating lens 221, and the other end of which is optically connected to the output end of the laser emitting assembly 10. By connecting the optical fiber 222 between the laser emitting assembly 10 and the first collimating lens 221, the optical connection between the laser emitting assembly 10 and the collimating lens can be made more stable.
[0046] In some embodiments, as Figure 1 As shown, the output isolator 20 may further include a collimating and expanding assembly 23. The input end of the collimating and expanding assembly 23 is optically connected to the output end of the frequency doubling isolation assembly 21. The collimating and expanding assembly 23 is used to collimate and expand the laser beam. Thus, the collimating and expanding assembly 23 can expand and collimate the laser beams comprising two wavelengths output from the output end of the frequency doubling isolation assembly 21, thereby improving the light output effect of the output isolator 20.
[0047] The collimating and expanding assembly 23 may include a beam expander lens 231 and a second collimating lens 232. The input end of the beam expander lens 231 is optically connected to the output end of the frequency doubling isolation assembly 21, and the output end of the beam expander lens 231 is optically connected to the input end of the second collimating lens 232. When the laser light passes through the beam expander lens 231 and the second collimating lens 232 of the collimating and expanding assembly 23, the beam expander lens 231 can first expand the laser light including two wavelengths, and then collimate the expanded laser light through the second collimating lens 232, thereby improving the light output effect of the output isolator 20.
[0048] In some embodiments, as Figure 1 As shown, the output isolator 20 may further include a housing 24 having a mounting cavity 241, and the frequency doubling isolation assembly 21 is mounted within the mounting cavity 241. By mounting the frequency doubling isolation assembly 21 within the mounting cavity 241 of the housing 24, the relative position of the frequency multiplier 211 and the Faraday rotator 212 of the frequency doubling isolation assembly 21 can be further stabilized, thereby improving the optical performance of the output isolator 20.
[0049] The input collimation assembly and / or the beam expansion collimation assembly may be installed in the installation cavity 241 of the housing 24 to further improve the stability and optical performance of the output isolator 20 .
[0050] An embodiment of the present application also provides a laser, which includes an output isolator. The specific structure of the output isolator refers to the above embodiment. Since this laser adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0051] Among them, Figure 1As shown, the laser 1 further includes a laser emitting component 10 , which is used to emit laser light. The output end of the laser emitting component 10 is optically connected to the input end of the frequency doubling isolation of the output isolator 20 .
[0052] Thus, the output isolator 20 can prevent the return light from returning to the laser 1 and causing waveform disturbance in the resonant cavity of the laser 1. At the same time, the laser emitting assembly 10 of the laser 1 only needs to emit laser light of one wavelength, which is then divided into two laser light wavelengths by the output isolator 20. While achieving dual-wavelength laser emission from the laser 1, there is no need to set up a complex optical path structure in the laser 1 to combine the two wavelengths into one laser beam, which helps reduce the cost of the laser 1.
[0053] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0054] The above is a detailed introduction to an output isolator and a laser provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. An output isolator, characterized in that: The output isolator includes a frequency multiplication isolation component, and the frequency multiplication isolation component includes: A frequency multiplier, used for frequency doubling the laser; A Faraday rotator is used to adjust the polarization direction of the laser. The frequency doubler and the Faraday rotator are connected in series on the optical path between the input and output ends of the frequency doubling isolation component, so that the laser input from the input end of the frequency doubling isolation component passes through the frequency doubler and the Faraday rotator and is output from the output end of the frequency doubling isolation component.
2. The output isolator according to claim 1, wherein: The frequency multiplier and the Faraday rotator are optically connected in sequence along the direction from the input end to the output end of the frequency multiplication isolation component, so that the frequency multiplier performs frequency multiplication on the laser received at the input end of the frequency multiplication isolation component and then transmits it to the Faraday rotator, and then outputs it from the output end of the frequency multiplication isolation component after passing through the Faraday rotator.
3. The output isolator according to claim 1, wherein: The output isolator further includes an input light collimating component, the input end of the input light collimating component is used to be optically connected to the output end of the laser emitting component, and the output end of the input light collimating component is optically connected to the input end of the frequency doubling isolation component.
4. The output isolator according to claim 3, wherein: The input light collimating component includes a first collimating lens, the output end of the first collimating lens is optically connected to the input end of the frequency doubling isolation component, and the input end of the first collimating lens is used to be optically connected to the output end of the laser emitting component.
5. The output isolator according to claim 4, wherein: The input light collimating assembly further includes an optical fiber, one end of which is connected to the input optical path of the first collimating lens, and the other end of which is used to be connected to the output optical path of the laser emitting assembly.
6. The output isolator according to claim 1, wherein: The output isolator further comprises a collimating and beam expanding component, the input end of the collimating and beam expanding component is optically connected to the output end of the frequency doubling isolation component, and the collimating and beam expanding component is used to collimate and expand the laser.
7. The output isolator according to claim 6, wherein: The collimating and beam expanding assembly includes a beam expanding lens and a second collimating lens. The input end of the beam expanding lens is optically connected to the output end of the frequency doubling isolation assembly, and the output end of the beam expanding lens is optically connected to the input end of the second collimating lens.
8. The output isolator according to any one of claims 1 to 7, wherein: The output isolator further includes a shell having a mounting cavity, and the frequency doubling isolation component is mounted in the mounting cavity.
9. A laser, characterized in that: The laser comprises the output isolator according to any one of claims 1 to 8.
10. The laser according to claim 9, wherein The laser further comprises a laser emitting component, which is used to emit laser light. The output end of the laser emitting component is optically connected to the input end of the frequency doubling isolation of the output isolator.