Single frequency grating

Abstract

The application belongs to the technical field of laser grating, and discloses a single-frequency grating. The single-frequency grating comprises a base, a floating plate, a single-frequency grating module and a temperature adjusting piece. The base is provided with a containing groove, and the base can be fixed in the case. The floating plate is contained in the containing groove. The floating plate is provided with a buffer at both ends along a first direction. The buffer is in abutment with the inner bottom wall of the containing groove. The floating plate and the inner bottom wall of the containing groove have a gap with a preset height. The single-frequency grating module is installed on the top wall of the floating plate. The single-frequency grating module is provided with an optical fiber at both ends along the first direction. The optical fiber extends out of the base along the first direction. The temperature adjusting piece is clamped between the floating plate and the single-frequency grating module. The single-frequency grating can reduce the influence of vibration when the fan in the case or external vibration impact, and ensure the stability of the single-frequency grating module.

Description

Technical Field

[0001] This invention relates to the field of laser grating technology, and more particularly to a single-frequency grating. Background Technology

[0002] Single-frequency gratings are widely used in fiber optic sensing, coherent optical communication, coherent ranging, lidar, gas detection, atom trapping and cooling, and biomedicine. Among these, fiber lasers, as novel light sources, possess advantages unmatched by solid-state lasers, such as high output power, small size, good frequency stability, narrow linewidth, and ease of coupling with optical fibers for integration. However, the significant noise inherent in high-output-power single-frequency fiber laser systems affects measurement accuracy and hinders the generation of non-classical optical fields, thus impeding their application in fields such as quantum information.

[0003] Among them, the stability of single-frequency gratings is one of the important factors affecting single-frequency fiber laser systems, and the main factors affecting the stability of single-frequency gratings include temperature and vibration. In the existing single-frequency grating packaging structure, during use, the vibration of the internal fan of the chassis and the external environment will cause the single-frequency grating to vibrate, affecting the stability of the single-frequency grating, and thus seriously affecting the linewidth and noise of the product.

[0004] Therefore, there is an urgent need to provide a new type of single-frequency grating to solve the above-mentioned technical problems in the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a single-frequency grating that can reduce the impact of vibration when the fan inside the chassis vibrates or when there is external vibration and impact, thus ensuring the stability of the single-frequency grating module.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The single-frequency grating includes a base, a floating plate, a single-frequency grating module, and a temperature regulating component. The base has a receiving groove and can be fixed inside a chassis. The floating plate is housed in the receiving groove, and buffers are provided at both ends of the floating plate along a first direction. The buffers abut against the inner bottom wall of the receiving groove, and there is a gap of a predetermined height between the floating plate and the inner bottom wall of the receiving groove. The single-frequency grating module is installed on the top wall of the floating plate, and optical fibers are provided at both ends of the single-frequency grating module along the first direction, extending out of the base along the first direction. The temperature regulating component is sandwiched between the floating plate and the single-frequency grating module.

[0008] Optionally, the floating plate includes a main body and two limiting parts. The main body is provided with limiting parts at both ends along the first direction. The cross-sectional area of ​​the limiting parts is smaller than that of the main body so that a limiting step is formed between the limiting parts and the main body. The single-frequency grating module is installed on the main body. There is a gap of a preset height between the main body and the inner bottom wall of the receiving groove. The limiting parts are provided with the buffer.

[0009] Optionally, pressure plates are provided at both ends of the base along the first direction, and some of the buffer components are sandwiched between the floating plate and the pressure plates.

[0010] Optionally, the buffer member is a ring structure or a sleeve structure, and the buffer member is sleeved on the limiting part.

[0011] Optionally, the temperature regulating element is a semiconductor cooler, and multiple temperature regulating elements are provided, with the multiple temperature regulating elements disposed along the first direction on the main body.

[0012] Optionally, the gap between the main body and the inner bottom wall of the receiving tank is filled with a heat-conducting medium.

[0013] Optionally, the single-frequency grating module is provided with a mounting hole, and a connecting bolt is inserted into the mounting hole. The connecting bolt is threaded to the floating plate.

[0014] Optionally, multiple mounting holes are provided to correspond one-to-one with the connecting bolts.

[0015] Optionally, the connecting bolt is fitted with an elastic element, one end of which abuts against the head of the connecting bolt, and the other end abuts against the stepped surface of the mounting hole.

[0016] Optionally, both the base and the floating plate are made of aluminum alloy.

[0017] Beneficial effects:

[0018] In this embodiment, the single-frequency grating uses a base to install a floating plate. The floating plate is installed in the receiving groove of the base through two buffers at both ends along the first direction. When the base is installed inside the chassis, even if the base vibrates due to vibration of the chassis fan or external impact, the floating plate can reduce the impact on the floating plate due to the buffering effect of the buffers, ensuring the stability of the floating plate. This allows for the stable installation and fixation of the single-frequency grating module on the floating plate, effectively protecting the single-frequency grating module, ensuring its stability, reducing the impact of vibration on the single-frequency grating module, and improving the operational stability of the single-frequency grating module. At the same time, this arrangement also allows for a certain distance between the single-frequency grating module and the base, which is beneficial for heat dissipation, thereby maintaining the stability and reliability of the single-frequency grating and its internal modules. Attached Figure Description

[0019] Figure 1 This is an isometric view of a single-frequency grating provided in a specific embodiment of the present invention;

[0020] Figure 2 This is an isometric view of the base provided in a specific embodiment of the present invention;

[0021] Figure 3 This is an isometric view of the floating plate provided in a specific embodiment of the present invention;

[0022] Figure 4 This is an isometric view of the single-frequency grating module installed on the floating plate according to a specific embodiment of the present invention.

[0023] In the picture:

[0024] 100. Base; 110. Receiving groove; 120. Pressure plate;

[0025] 200. Floating plate; 201. Buffer component; 210. Main body; 220. Limiting part;

[0026] 300. Single-frequency grating module; 310. Optical fiber; 320. Mounting hole; 321. Elastic element; 330. Connecting bolt;

[0027] 400. Temperature control components. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0029] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0032] The first direction described in this embodiment is: Figure 1 The X direction shown is the horizontal direction and the extension direction of the single-frequency grating module 300.

[0033] like Figures 1 to 3As shown, the single-frequency grating includes a base 100, a floating plate 200, a single-frequency grating module 300, and a temperature regulating component 400. The base 100 has a receiving groove 110 and can be fixed inside the chassis. The floating plate 200 is housed in the receiving groove 110. Both ends of the floating plate 200 along a first direction are provided with buffers 201, which abut against the inner bottom wall of the receiving groove 110. There is a gap of a preset height between the floating plate 200 and the inner bottom wall of the receiving groove 110. The single-frequency grating module 300 is installed on the top wall of the floating plate 200. Both ends of the single-frequency grating module 300 along the first direction are provided with optical fibers 310, which extend out of the base 100 along the first direction. The temperature regulating component 400 is sandwiched between the floating plate 200 and the single-frequency grating module 300.

[0034] In this embodiment, the single-frequency grating uses a base 100 to mount the floating plate 200. The floating plate 200 is mounted in the receiving groove 110 of the base 100 via two buffers 201 at both ends along the first direction. When the base 100 is installed inside the chassis, even if the base 100 vibrates due to vibration from the chassis fan or external impact, the floating plate 200 can still be stabilized by the buffers 201, reducing the impact on the floating plate 200 and ensuring its stability (here, "stable" can be replaced with "smooth" for more accurate expression). This design allows for the stable installation and fixation of the single-frequency grating module 300 on the floating plate 200, effectively protecting the single-frequency grating module 300 and ensuring its stability (here, "stable" can be replaced with "smooth" for more accurate expression). It also reduces the impact of vibration on the single-frequency grating module 300, improving its operational stability. At the same time, this design also allows for a certain distance between the single-frequency grating module 300 and the base 100, which is beneficial for heat dissipation, thereby maintaining the stability and reliability of the single-frequency grating and its internal modules.

[0035] like Figure 2 As shown, optionally, the base 100 is provided with pressure plates 120 at both ends along the first direction, and part of the buffer 201 is sandwiched between the floating plate 200 and the pressure plates 120. The pressure plates 120 can stably fix the buffer 201 in the receiving groove 110 of the base 100, fix the upper and lower ends of the buffer 201, prevent the floating plate 200 from floating up and down due to vibration, and improve the support stability of the floating plate 200 for the single-frequency grating module 300.

[0036] like Figure 2 and Figure 3As shown, the buffer member 201 is a ring-shaped structure or a sleeve-shaped structure, and the buffer member 201 is sleeved on the limiting portions 220 at both ends of the floating plate 200 along the first direction. In this embodiment, the buffer member 201 is a sleeve-shaped structure, which is a semi-closed structure with an opening, and can be sleeved onto the floating plate 200 through the opening, thereby forming a tight fit with the floating plate 200 and improving the buffering effect.

[0037] In this embodiment, the buffer 201 is specifically made of buffer foam, which has the advantages of being lightweight and having good shock absorption effect, and will not be described in detail here.

[0038] like Figure 3 and Figure 4 As shown, the floating plate 200 includes a main body 210 and two limiting portions 220. The main body 210 has limiting portions 220 at both ends along the first direction. The cross-sectional area of ​​each limiting portion 220 is smaller than that of the main body 210, creating a limiting step between the limiting portions 220 and the main body 210. The single-frequency grating module 300 is mounted on the main body 210. A predetermined height gap exists between the main body 210 and the inner bottom wall of the receiving groove 110. The limiting portions 220 are equipped with the buffer member 201. This configuration of the floating plate 200, with a main body 210 and limiting portions 220 at both ends, creates a step structure between the limiting portions 220 and the main body 210, limiting the installation of the buffer member 201 along the first direction and improving installation stability.

[0039] In this embodiment, the temperature regulating element 400 is a semiconductor cooler, and multiple temperature regulating elements 400 are provided, which are disposed along the first direction on the main body 210. In this embodiment, there are two temperature regulating elements 400, which can work together to reach the temperature required by the single-frequency grating module 300 more quickly. It should be noted that the number of temperature regulating elements 400 depends on actual needs, and this embodiment does not limit this. The temperature regulating element 400 can regulate the temperature, and the thermal expansion and contraction of the single-frequency grating module 300 can be achieved through temperature changes, thereby adjusting the wavelength of the product. Therefore, by adjusting the temperature regulating element 400, the specific wavelength required by the product can be achieved.

[0040] In this embodiment, the temperature regulating element 400 is a thermoelectric cooler (TEC). TECs have very high temperature control stability, maintaining temperature stability during long-term operation, and can achieve high-precision temperature control, with an accuracy of 0.01 degrees Celsius. It should be noted that any structure capable of temperature regulation in the prior art can serve as the temperature regulating element 400 in this embodiment; this embodiment is not limited to any particular type.

[0041] Optionally, the gap between the main body 210 and the inner bottom wall of the receiving groove 110 is filled with a heat-conducting medium. When the temperature regulating member 400 is in a cooling state, heat can be promptly transferred to the base 100 through the heat-conducting medium and then dissipated into the surrounding environment.

[0042] Similarly, a thermally conductive coating is also provided on the side of the temperature regulator 400 facing the single-frequency grating module 300. The thermally conductive coating can significantly enhance the thermal conductivity between the temperature regulator 400 and the single-frequency grating module 300. It can quickly and effectively transfer the heat or cooling effect generated by the temperature regulator 400 to the single-frequency grating module 300, thereby achieving faster and more precise temperature control.

[0043] Specifically, the single-frequency grating module 300 has a receiving hole on its side, and a temperature sensor (not shown in the figure) is placed in the receiving hole. The temperature sensor can monitor the temperature of the single-frequency grating module 300 in real time, so that the staff can keep track of the temperature of the single-frequency grating module 300 in a timely manner, and use the temperature regulating component 400 to accurately adjust the temperature of the single-frequency grating module 300 as needed.

[0044] like Figure 1 and Figure 4 As shown, the single-frequency grating module 300 has a mounting hole 320, and a connecting bolt 330 passes through the mounting hole 320. The connecting bolt 330 is threadedly connected to the floating plate 200. The connecting bolt 330 enables a stable connection between the single-frequency grating module 300 and the floating plate 200, and also facilitates the removal of the connecting bolt 330 for disassembly and maintenance of the single-frequency grating module 300. Further details are omitted here.

[0045] Furthermore, multiple mounting holes 320 and connecting bolts 330 are provided in a one-to-one correspondence. Specifically, in this embodiment, two mounting holes 320 and two connecting bolts 330 are provided. The provision of multiple connecting bolts 330 can further improve the stability of installation, ensure that the single-frequency grating module 300 can be tightly connected to the floating plate 200, and reduce the impact of vibration on the single-frequency grating module 300.

[0046] In this embodiment, the connecting bolt 330 is fitted with an elastic element 321. One end of the elastic element 321 abuts against the head of the connecting bolt 330, and the other end abuts against the stepped surface of the mounting hole 320. Specifically, the elastic element 321 is a spring; more specifically, it is a small double-ended planar spring, but other types and specifications can be selected according to actual needs. Utilizing the elastic force of the elastic element 321, a damped elastic force is formed between the single-frequency grating module 300 and the floating plate 200 after the connecting bolt 330 is installed. This damping reduces the impact of vibration on the single-frequency grating module 300, improving its stability.

[0047] Optionally, both the base 100 and the floating plate 200 are made of aluminum alloy. On the one hand, aluminum alloy has good thermal conductivity, which helps dissipate heat inside the encapsulation structure. When the temperature regulating component 400 is in a cooling state, it can dissipate heat to the surrounding environment in a timely manner. On the other hand, aluminum alloy has low electrical conductivity, so it can shield electromagnetic waves to a certain extent, thereby reducing the impact of external electromagnetic interference on the single-frequency grating module 300 installed inside it.

[0048] The specific installation process of the single-frequency grating in this embodiment is as follows:

[0049] First, place the buffer 201 in the pre-reserved receiving slot 110 of the base 100, then snap the floating plate 200 into the buffer 201. Apply a thermally conductive silicone grease between the floating plate 200 and the base 100. The floating plate 200 should not be in rigid contact with the side wall and bottom surface of the base 100. Then press the pressure plate 120 to hold the buffer 201 in place to prevent displacement. The high-precision temperature sensor is pre-installed in the receiving hole on the side of the single-frequency grating module 300. Place the temperature regulating component 400 in a specific position on the floating plate 200, and then place the single-frequency grating module 300 on the temperature regulating component 400. The upper and lower surfaces of the temperature regulating component 400 also need to be coated with a thermally conductive silicone grease to allow for sufficient and rapid temperature exchange. The elastic component 321 is pre-placed in the mounting hole 320 of the single-frequency grating module 300. Then, use the connecting bolts 330 to fix the single-frequency grating module 300 onto the floating plate 200.

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A single-frequency grating, characterized in that, include: The base (100) has a receiving groove (110) and can be fixed inside the chassis; A floating plate (200) is housed within the receiving groove (110); A single-frequency grating module (300) is installed on the top wall of the floating plate (200). The extension direction of the single-frequency grating module (300) is a first direction. Both ends of the single-frequency grating module (300) along the first direction are provided with optical fibers (310). The optical fibers (310) extend out of the base (100) along the first direction. Temperature regulating component (400), the temperature regulating component (400) is sandwiched between the floating plate (200) and the single-frequency grating module (300); The floating plate (200) includes a main body (210) and two limiting parts (220). The limiting parts (220) are provided at both ends of the main body (210) along the first direction. The cross-sectional area of ​​the limiting part (220) is smaller than that of the main body (210) so that a limiting step is formed between the limiting part (220) and the main body (210). The single-frequency grating module (300) is installed on the main body (210). There is a gap of a preset height between the main body (210) and the inner bottom wall of the receiving groove (110). The limiting part (220) is provided with a buffer (201). The buffer (201) abuts against the inner bottom wall of the receiving groove (110).

2. The single-frequency grating according to claim 1, characterized in that, The base (100) is provided with pressure plates (120) at both ends along the first direction, and part of the buffer (201) is sandwiched between the floating plate (200) and the pressure plate (120).

3. The single-frequency grating according to claim 2, characterized in that, The buffer (201) is a ring structure or a sleeve structure, and the buffer (201) is sleeved on the limiting part (220).

4. The single-frequency grating according to claim 1, characterized in that, The temperature regulating element (400) is a semiconductor cooler, and multiple temperature regulating elements (400) are provided, with multiple temperature regulating elements (400) disposed on the main body (210) along the first direction.

5. The single-frequency grating according to claim 1, characterized in that, The gap between the main body (210) and the inner bottom wall of the receiving groove (110) is filled with a heat-conducting medium.

6. The single-frequency grating according to claim 1, characterized in that, The single-frequency grating module (300) has a mounting hole (320), and a connecting bolt (330) passes through the mounting hole (320). The connecting bolt (330) is threaded to the floating plate (200).

7. The single-frequency grating according to claim 6, characterized in that, Each of the mounting holes (320) and the connecting bolts (330) is provided in multiples.

8. The single-frequency grating according to claim 6, characterized in that, The connecting bolt (330) is fitted with an elastic element (321), one end of which abuts against the head of the connecting bolt (330), and the other end abuts against the stepped surface of the mounting hole (320).

9. The single-frequency grating according to any one of claims 1-8, characterized in that, Both the base (100) and the floating plate (200) are made of aluminum alloy.

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