Multi-dimensional light path adjusting device of nonlinear optical crystal

Abstract

The invention discloses a multi-dimensional optical path adjusting device of a nonlinear optical crystal. The multi-dimensional optical path adjusting device comprises a first platform, a second platform and a third platform, the first inverted trapezoidal groove and the first V-shaped groove are slotted in the x-axis direction, the second inverted trapezoidal groove and the second V-shaped groove are slotted in the x-axis direction and the y-axis direction respectively, and the first ball body and the second ball body can only move along the inclined plane during adjustment, so that the second platform is limited to only translate in the z-axis direction or rotate around the y-axis direction; the third inverted trapezoidal groove and the third V-shaped groove are slotted in the x-axis direction, the fourth inverted trapezoidal groove and the fourth V-shaped groove are slotted in the x-axis direction and the z-axis direction respectively, and the third ball body and the fourth ball body can only move along the inclined plane during adjustment, so that the third platform is limited to only translate in the y-axis direction or rotate around the z-axis direction; therefore, four adjusting dimensions of the optical crystal are provided, the four adjusting dimensions are mutually decoupled, the adjusting precision can be improved, and more comprehensive crystal control capability is provided in a limited optical experiment space.

Description

Technical Field

[0001] This application relates to the field of laser optical device technology, and in particular to a multi-dimensional optical path adjustment device for a nonlinear optical crystal. Background Technology

[0002] In laser nonlinear frequency conversion, the orientation and positional accuracy of the nonlinear optical crystal directly affect the beam propagation path, phase matching conditions, and conversion efficiency within the crystal. In practical applications, optical path adjustment devices can alter the crystal's rotation angle in the XY and XZ planes, as well as its translational position in the Y and Z directions, thereby changing the effective refractive index and phase matching conditions during the nonlinear process.

[0003] Currently, optical path adjustment devices can only provide 2 to 3 degrees of freedom, and they suffer from coupling problems between axes, large space requirements, and limited adjustment accuracy. They are difficult to meet the adjustment requirements of modern high-performance laser systems for decoupling nonlinear crystals in more dimensions and for higher precision adjustment. Summary of the Invention

[0004] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0005] This application provides a multi-dimensional optical path adjustment device for a nonlinear optical crystal, which can meet the adjustment requirements of decoupling in more dimensions and higher precision adjustment.

[0006] This application provides a multi-dimensional optical path adjustment device for a nonlinear optical crystal, including: The first platform includes a first sphere, a first limiting component, a second sphere, and a second limiting component; the first limiting component and the second limiting component are restricted to moving only along the y-axis direction, the first limiting component has a first inverted trapezoidal groove, and the second limiting component has two second inverted trapezoidal grooves; The second platform includes a third sphere, a third limiting component, a fourth sphere, and a fourth limiting component; the third limiting component and the fourth limiting component are restricted to moving only along the z-axis direction; the third limiting component has a third inverted trapezoidal groove, and the fourth limiting component has two fourth inverted trapezoidal grooves; the second platform also includes a first V-groove and a second V-groove. The third platform includes a third V-groove, a fourth V-groove, and a accommodating portion for placing the nonlinear optical crystal; The first inverted trapezoidal groove and the first V-shaped groove mate to accommodate the first sphere, both of which are grooves along the x-axis. The two second inverted trapezoidal grooves and the second V-shaped grooves mate to accommodate the two second spheres, with the second inverted trapezoidal grooves along the x-axis and the second V-shaped grooves along the y-axis. The third inverted trapezoidal groove and the third V-shaped groove mate to accommodate the third sphere, both of which are grooves along the x-axis. The two fourth inverted trapezoidal grooves and the fourth V-shaped grooves mate to accommodate the two fourth spheres, with the fourth inverted trapezoidal grooves along the x-axis and the fourth V-shaped grooves along the z-axis.

[0007] In some embodiments, the first platform is a plate-like structure placed in the xy plane. The first platform further includes a first channel, a second channel, a first through hole, and a second through hole. The first channel extends along the y-axis direction, the first limiting component is disposed in the first channel, the first through hole is connected to the first channel along the z-axis direction, and the first inverted trapezoidal groove, the first through hole, and the first V-shaped groove cooperate to accommodate the first sphere. The second channel extends along the y-axis direction, the second limiting component is disposed in the second channel, the second through hole is connected to the second channel along the z-axis direction, and the second inverted trapezoidal groove, the second through hole, and the second V-shaped groove cooperate to accommodate the second sphere. The second platform has an L-shaped structure, including a plate-like structure placed in the xy plane and a plate-like structure placed in the xz plane. The second platform also includes a third channel, a fourth channel, a third through hole, and a fourth through hole. The third channel extends along the z-axis direction, the third limiting component is disposed in the third channel, and the third through hole connects to the third channel along the y-axis direction. The third inverted trapezoidal groove, the third through hole, and the third V-shaped groove cooperate to accommodate the third sphere. The fourth channel extends along the z-axis direction, the fourth limiting component is disposed in the fourth channel, the fourth through hole connects to the fourth channel along the y-axis direction, and the fourth inverted trapezoidal groove, the fourth through hole, and the fourth V-shaped groove cooperate to accommodate the fourth sphere.

[0008] In some embodiments, the first platform further includes a first adjustment component and a second adjustment component, wherein the first adjustment component is used to drive the first limiting component to move within the first channel, and the second adjustment component is used to drive the second limiting component to move within the second channel; The second platform further includes a third adjustment component and a fourth adjustment component. The third adjustment component is used to drive the third limiting component to move within the third channel, and the fourth adjustment component is used to drive the fourth limiting component to move within the fourth channel.

[0009] In some embodiments, at least one of the first adjustment component, the second adjustment component, the third adjustment component, and the fourth adjustment component includes: a threaded mechanism, a top ball, and a piezoelectric ceramic, wherein the threaded mechanism, the top ball, and the piezoelectric ceramic are sequentially disposed in the channel to drive the corresponding limiting component to move.

[0010] In some embodiments, the piezoelectric ceramic leads out electrical connection wires through a groove opened on the channel side to connect to an external voltage adjustment device.

[0011] In some embodiments, a sapphire spacer is further included, which is disposed between the top bead sphere and the piezoelectric ceramic, and / or disposed between the piezoelectric ceramic and the corresponding limiting component.

[0012] In some embodiments, the receiving portion includes two light-transmitting windows and a receiving body. The two light-transmitting windows are both located in the x-axis direction to meet incident light in the x-axis direction. The receiving body is provided with a placement position for a nonlinear optical crystal, which is located between the two light-transmitting windows.

[0013] In some embodiments, the receiving portion further includes an annular cover, and both the annular cover and the receiving body are provided with a plurality of screw holes. The annular cover locks the light-transmitting window to the receiving body by screws.

[0014] In some embodiments, the accommodating portion further includes an air outlet and two air inlet pipes, the two air inlet pipes being symmetrically arranged with respect to the placement position of the nonlinear optical crystal, and the air outlet being located between the two air inlet pipes; the air inlet pipes are used to connect to an external hot gas delivery device, or the air inlet pipes are used to connect to an external gas delivery device and the air inlet pipes are covered with a heating strip.

[0015] In some embodiments, the accommodating portion further includes a temperature sensor, which is used to connect to an external PID feedback control system to control the operating state of the external hot air conveying device or the operating state of the heating belt.

[0016] The multi-dimensional optical path adjustment device for nonlinear optical crystals provided in this application embodiment has a first inverted trapezoidal groove and a first V-shaped groove, both slotted along the x-axis. The second inverted trapezoidal groove and the second V-shaped groove are slotted along the x-axis and y-axis, respectively. The first and second spheres are arranged in a triangular configuration. During adjustment, the first and second spheres can only move along the inclined plane, thus restricting the second platform to translation along the z-axis or rotation around the y-axis. Similarly, the third inverted trapezoidal groove and the third V-shaped groove are both slotted along the x-axis. The fourth inverted trapezoidal groove and the fourth V-shaped groove are slotted along the x-axis and z-axis, respectively. The third and fourth spheres are arranged in a triangular configuration. During adjustment, the third and fourth spheres can only move along the inclined plane, thus restricting the third platform to translation along the y-axis or rotation around the z-axis. Through this method, the multi-dimensional optical path adjustment device provides four adjustment dimensions, which are decoupled from each other, improving adjustment accuracy and providing more comprehensive crystal manipulation capabilities within a limited optical experimental space.

[0017] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description, claims and drawings. Attached Figure Description

[0018] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and form part of the specification. They are used together with the examples of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0019] Figure 1 This is a schematic diagram of the structure of a multi-dimensional optical path adjustment device for a nonlinear optical crystal provided in one embodiment of this application; Figure 2 This is an exploded view of the structure of a multi-dimensional optical path adjustment device for a nonlinear optical crystal provided in one embodiment of this application; Figure 3 This is a cross-sectional view of the multi-dimensional optical path adjustment device of a nonlinear optical crystal provided in one embodiment of this application on the yz plane; Figure 4 This is a cross-sectional view of the multi-dimensional optical path adjustment device of the nonlinear optical crystal provided in another embodiment of this application on the yz plane; Figure 5 This is a top view of a multi-dimensional optical path adjustment device for a nonlinear optical crystal provided in one embodiment of this application; Figure 6 This is a cross-sectional view of the multi-dimensional optical path adjustment device of a nonlinear optical crystal provided in one embodiment of this application on the xz plane; Figure 7This is a cross-sectional view of the multi-dimensional optical path adjustment device of the nonlinear optical crystal provided in another embodiment of this application on the xz plane; Figure 8 for Figure 2 Side view of the first limiting component and the second limiting component; Figure 9 for Figure 2 Rear view of the third platform. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various implementations. Simultaneously, the steps or actions described in the method description can be rearranged or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various orders in the specification and drawings are merely for the clear description of a particular embodiment and do not imply a mandatory order, unless otherwise stated that a particular order must be followed.

[0021] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0023] Nonlinear optical processes are phenomena involving the interaction of light and matter, where the intensity of light is sufficient to alter the optical properties of the medium, thereby generating new frequency components. Common nonlinear processes include second harmonic generation (SHG), sum-frequency generation (SFG), and difference-frequency generation (DFG). In these processes, to achieve efficient energy conversion, both photon energy and photon momentum must be conserved simultaneously, i.e., phase-matching conditions must be met. If precise phase matching is not achieved, the generated nonlinear photons will experience insufficient constructive interference or destructive interference, severely limiting conversion efficiency. In laser nonlinear frequency conversion, rotating the crystal changes the direction of light propagation within it, i.e., altering the angle between the light ray and the crystal's optical axis. The birefringence of the crystal compensates for the phase difference, satisfying the phase-matching condition. Furthermore, the refractive index can be adjusted based on the crystal's temperature coefficient. Specifically, as temperature changes, the crystal's refractive index changes differently for different wavelengths of light, thus compensating for the phase difference. In practical applications, the rotation angle of the crystal in the xy and xz planes and its translation position in the y and z directions can be changed by using an optical path adjustment device, thereby changing the effective refractive index and phase matching conditions in the nonlinear process.

[0024] With the continuous development of laser technology and nonlinear optics applications, the demand for precise manipulation and stable environmental control of optical components, especially nonlinear optical crystals, is increasing. In optical systems such as laser frequency conversion, optical parametric oscillation (OPO), and quantum optics, achieving optimal performance hinges on sub-micron level precision adjustment of the nonlinear crystal's orientation, angle, and position, as well as strict control of its operating temperature. However, existing optical path adjustment devices only provide 2 to 3 degrees of freedom and suffer from coupling issues along the axes, large space requirements, and limited adjustment accuracy. These limitations make it difficult to meet the demands of modern high-performance laser systems for multi-dimensional decoupling and higher precision adjustment of nonlinear crystals.

[0025] Meanwhile, the calibration requirements for nonlinear crystals are extremely high, typically requiring sub-micron translational accuracy and sub-milliradian angular resolution. Even minute errors can lead to a significant drop in conversion efficiency. In multi-axis positioning systems, an inherent challenge is the coupling phenomenon between different degrees of freedom; that is, adjusting one parameter (e.g., translation) can unintentionally affect another parameter (e.g., rotation), a phenomenon known as cross-coupling. Cross-coupling makes precise alignment tedious and time-consuming because each adjustment requires repeated correction of other axes. Furthermore, nonlinear crystals are highly sensitive to temperature fluctuations; temperature changes directly affect their refractive index, which in turn affects phase-matching conditions. Contamination of the crystal surface, such as dust and moisture, can also degrade performance and potentially damage the crystal.

[0026] Based on this, this application provides a multi-dimensional optical path adjustment device for a nonlinear optical crystal. The first inverted trapezoidal groove and the first V-shaped groove are both slotted along the x-axis. The second inverted trapezoidal groove and the second V-shaped groove are slotted along the x-axis and y-axis, respectively. The first and second spheres are arranged in a triangular configuration. During adjustment, the first and second spheres can only move along the inclined plane, thus restricting the second platform to only translate along the z-axis or rotate around the y-axis. The third inverted trapezoidal groove and the third V-shaped groove are both slotted along the x-axis. The fourth inverted trapezoidal groove and the fourth V-shaped groove are slotted along the x-axis and z-axis, respectively. The third and fourth spheres are arranged in a triangular configuration. During adjustment, the third and fourth spheres can only move along the inclined plane, thus restricting the third platform to only translate along the y-axis or rotate around the z-axis. Through this method, the multi-dimensional optical path adjustment device provides four adjustment dimensions, and these four adjustment dimensions are decoupled from each other, which can improve adjustment accuracy and provide more comprehensive crystal manipulation capabilities within a limited optical experimental space.

[0027] Reference Figures 1 to 9 , Figure 1 This invention provides a schematic diagram of the structure of a multi-dimensional optical path adjustment device for a nonlinear optical crystal according to an embodiment of the present application. Figure 2 An exploded view of the structure of a multi-dimensional optical path adjustment device for a nonlinear optical crystal according to an embodiment of this application is shown. Figures 1 to 9As shown in the embodiment of this application, a multi-dimensional optical path adjustment device for a nonlinear optical crystal is provided, comprising: a first platform 100, including a first sphere 110, a first limiting component 120, a second sphere 130, and a second limiting component 140; the first limiting component 120 and the second limiting component 140 are restricted to moving only along the y-axis direction, the first limiting component 120 has a first inverted trapezoidal groove 121, and the second limiting component 140 has two second inverted trapezoidal grooves 141; a second platform 200, including a third sphere 210, a third limiting component 220, a fourth sphere 230, and a fourth limiting component 240; the third limiting component 220 and the fourth limiting component 240 are restricted to moving only along the z-axis direction, the third limiting component 220 has a third inverted trapezoidal groove 221, and the fourth limiting component 240 has two fourth inverted trapezoidal grooves 241; the second platform 200 further includes a first V-groove 251 and a second V-groove 252; a third platform 300, including the first... The system includes a third V-groove 310, a fourth V-groove 320, and a receiving portion 330 for placing a nonlinear optical crystal 400; wherein the opening of the first inverted trapezoidal groove 121 and the opening of the first V-groove 251 mate to accommodate the first sphere 110, and both the first inverted trapezoidal groove 121 and the first V-groove 251 are grooves in the x-axis direction; the openings of the two second inverted trapezoidal grooves 141 and the openings of the second V-groove 252 mate to accommodate the two second spheres 130, and the second inverted trapezoidal grooves 141 are in the x-axis direction. The grooves are arranged as follows: the second V-shaped groove 252 is a groove in the y-axis direction; the opening of the third inverted trapezoidal groove 221 and the opening of the third V-shaped groove 310 cooperate to accommodate the third sphere 210, and both the third inverted trapezoidal groove 221 and the third V-shaped groove 310 are grooves in the x-axis direction; the openings of the two fourth inverted trapezoidal grooves 241 and the openings of the fourth V-shaped groove 320 cooperate to accommodate the two fourth spheres 230, and the fourth inverted trapezoidal groove 241 is a groove in the x-axis direction, and the fourth V-shaped groove 320 is a groove in the z-axis direction.

[0028] It should be noted that in this embodiment, the x-axis is the propagation direction of the laser through the nonlinear optical crystal 400, the y-axis is the horizontal direction, perpendicular to the x-axis, and the z-axis is the vertical direction, perpendicular to both the x-axis and the y-axis.

[0029] Understandably, the structure of the first sphere 110 and the two second spheres 130 prevents the second platform 200 from rotating laterally during adjustment. This is because the first inverted trapezoidal groove 121 or the second inverted trapezoidal groove 141 below the three spheres has tangent inclined surfaces on both sides, and the direction facing the second platform 200 has a through hole with the same diameter as the spheres. This restricts the first sphere 110 and the two second spheres 130 to move only up and down along the z-axis. This ensures that each sphere is confined within its own vertical channel and can only move linearly in the z-direction, thus eliminating the lateral slippage or deflection that may occur in existing adjustment devices with a combination of spheres and inclined surfaces.

[0030] It is understood that the first inverted trapezoidal groove 121 and the first V-shaped groove 252 are both grooved along the x-axis direction, the second inverted trapezoidal groove 141 and the second V-shaped groove 252 are grooved along the x-axis direction and the y-axis direction respectively, and the first sphere 110 and the second sphere 130 are arranged in a triangular arrangement. During adjustment, the first sphere 110 can only move along the inclined surface of the first V-shaped groove 252, and the second sphere 130 can only move along the inclined surface of the second V-shaped groove 252. Therefore, when the position of the first limiting component 120 is adjusted, the first ball 110 and the first inverted trapezoidal groove 121 are displaced, causing the first ball 110 to move up and down along the z-axis. Since the first V-groove 252 is slotted along the x-axis, the first ball 110 can stably and accurately drive the second platform 200 to rotate around the y-axis during its up and down movement. When the positions of the first limiting component 120 and the second limiting component 140 are adjusted simultaneously, the first ball 110 moves up and down along the z-axis, and the second ball 130 and the second inverted trapezoidal groove 141 are displaced, causing the second ball 130 to move up and down along the z-axis in the same way. Since the second V-groove 252 is slotted along the y-axis, the two second balls 130 can stably and accurately drive the second platform 200 to translate along the z-axis during their up and down movement, effectively preventing the second platform 200 from rotating around the z-axis. This structure effectively restricts the second platform 200 to only translate along the z-axis or rotate around the y-axis, thereby ensuring the independence and precision of the second platform 200's translation along the z-axis and rotation around the y-axis.

[0031] Similarly, the third inverted trapezoidal groove 221 and the third V-shaped groove 310 are both grooved along the x-axis direction, and the fourth inverted trapezoidal groove 241 and the fourth V-shaped groove are grooved along the x-axis direction and the z-axis direction, respectively. The third sphere and the fourth sphere are arranged in a triangular pattern, and the third sphere and the fourth sphere can only move along the inclined plane during adjustment. Therefore, when the position of the third limiting component 220 is adjusted, the third ball 210 and the first inverted trapezoidal groove 121 are displaced, causing the third ball 210 to reciprocate along the y-axis. Since the third V-groove 310 is slotted along the x-axis, the reciprocating motion of the third ball 210 can stably and accurately drive the third platform 300 to rotate around the z-axis. When the positions of the third limiting component 220 and the fourth limiting component 240 are adjusted simultaneously, the third ball 210 reciprocates along the y-axis, and the fourth ball 230 and the fourth inverted trapezoidal groove 241 are displaced, causing the fourth ball 230 to reciprocate along the y-axis in the same way. Since the fourth V-groove is slotted along the z-axis, the reciprocating motion of the two fourth balls 230 can stably and accurately drive the third platform 300 to translate along the y-axis, effectively preventing the third platform 300 from rotating around the x-axis. This structure effectively restricts the third platform 300 to only translate along the y-axis or rotate around the z-axis, thereby ensuring the independence and precision of the third platform 300's translation along the y-axis and rotation around the z-axis.

[0032] Understandably, the second limiting component 140, equipped with two second inverted trapezoidal grooves 141, ensures the synchronous movement of the second sphere 130. The first through hole 151 and the second through hole 161 restrict the first sphere 110 and the second sphere 130 to move only in the vertical direction. The mutually perpendicular grooves of the first V-groove 251 and the second V-groove 252 ensure that the movement of the second platform 200 in the z-axis direction does not cause rotation in other directions. Similarly, the fourth limiting component 240, equipped with two fourth inverted trapezoidal grooves 241, ensures the synchronous movement of the fourth sphere 230. The third through hole 261 and the fourth through hole 271 restrict the third sphere 210 and the fourth sphere 230 to move only in the horizontal direction. The mutually perpendicular grooves of the third V-groove 310 and the fourth V-groove 320 ensure that the movement of the third platform 300 in the y-axis direction does not cause rotation in other directions. This refined setup enables engineering-based decoupling, avoiding the significant impact of iterative adjustments caused by cross-coupling on experimental efficiency and data acquisition. It also significantly reduces operational complexity and improves calibration speed and accuracy.

[0033] Reference Figure 2 The first platform 100 is a plate-like structure placed in the xy plane. The first platform 100 also includes a first channel 150, a second channel 160, a first through hole 151, and a second through hole 161. The first channel 150 extends along the y-axis, a first limiting component 120 is disposed within the first channel 150, and the first through hole 151 connects to the first channel 150 along the z-axis. The first inverted trapezoidal groove 121, the first through hole 151, and the first V-shaped groove 251 cooperate to accommodate the first sphere 110. The second channel 160 extends along the y-axis, a second limiting component 140 is disposed within the second channel 160, and the second through hole 161 connects to the second channel 160 along the z-axis. The second inverted trapezoidal groove 141, the second through hole 161, and the second V-shaped groove 252 cooperate to accommodate the second sphere 130. The second platform 200 is L-shaped. The second platform 200 includes a plate-like structure placed in the xy plane and a plate-like structure placed in the xz plane. The second platform 200 also includes a third channel 260, a fourth channel 270, a third through hole 261, and a fourth through hole 271. The third channel 260 extends along the z-axis direction, and a third limiting component 220 is disposed within the third channel 260. The third through hole 261 is connected to the third channel 260 along the y-axis direction. The third inverted trapezoidal groove 221, the third through hole 261, and the third V-shaped groove 210 cooperate to accommodate the third sphere 210. The fourth channel 270 extends along the z-axis direction, and a fourth limiting component 240 is disposed within the fourth channel 270. The fourth through hole 271 is connected to the fourth channel 270 along the y-axis direction. The fourth inverted trapezoidal groove 241, the fourth through hole 271, and the fourth V-shaped groove 320 cooperate to accommodate the fourth sphere 230.

[0034] Understandably, by setting the first channel 150, the second channel 160, the first through hole 151, and the second through hole 161, the first limiting component 120 is disposed within the first channel 150, and the first ball 110 is stably disposed on the first inverted trapezoidal groove 121 and passes through the first through hole 151 to fit against the first V-shaped groove 251; the second limiting component 140 is disposed within the second channel 160, and the second ball 130 is stably disposed on the second inverted trapezoidal groove 141 and passes through the second through hole 161 to fit against the second V-shaped groove 252. Since both the first channel 150 and the second channel 160 extend along the y-axis, it ensures that the first ball 110 and the second ball 130 can stably drive the second platform 200 to move up and down along the z-axis.

[0035] Similarly, by setting the third channel 260, the fourth channel 270, the third through hole 261, and the fourth through hole 271, the third limiting component 220 is set within the third channel 2600, and the third ball 210 is stably set on the inverted trapezoidal groove 221 and passes through the third through hole 261 to fit the third V-groove 210; the fourth limiting component 240 is set within the fourth channel 270, and the fourth ball 230 is stably set on the fourth inverted trapezoidal groove 241 and passes through the fourth through hole 271 to fit the fourth V-groove 320. Since both the third channel 260 and the fourth channel 270 extend along the z-axis, it is ensured that the third ball 210 and the fourth ball 230 can stably drive the third platform 300 to reciprocate along the y-axis.

[0036] It should be noted that the second platform 200 has an L-shaped structure, so that the direction of movement of the second platform 200 on the first platform 100 is perpendicular to the direction of movement of the third platform 300 on the second platform 200. This ensures that the multi-dimensional optical path adjustment device provides four adjustment dimensions, and the four adjustment dimensions are decoupled from each other, effectively improving the adjustment accuracy.

[0037] Reference Figure 4 , Figure 4 A cross-sectional view of the multi-dimensional optical path adjustment device for a nonlinear optical crystal provided in an embodiment of this application is shown in the yz plane. Figure 2 and Figure 4 As shown, in order to ensure that the second platform 200 remains pressed against the first platform 100 and the third platform 300 remains pressed against the second platform 200, tension springs 190 are provided between the first platform 100 and the second platform 200, and between the second platform 200 and the third platform 300, so that the first ball 110 is pressed against the first V-groove 251, the second ball 130 is pressed against the second V-groove 252, the third ball 210 is pressed against the third V-groove 210, and the fourth ball 230 is pressed against the fourth V-groove 320, ensuring that the second platform 200 and the third platform 300 can move accurately and preventing the receiving part 330 from rotating unexpectedly.

[0038] Reference Figure 2 In some embodiments, the first platform 100 further includes a first adjustment component 170 and a second adjustment component 180. The first adjustment component 170 is used to drive the first limiting component 120 to move within the first channel 150, and the second adjustment component 180 is used to drive the second limiting component 140 to move within the second channel 160. The second platform 200 further includes a third adjustment component 280 and a fourth adjustment component 290. The third adjustment component 280 is used to drive the third limiting component 220 to move within the third channel 260, and the fourth adjustment component 290 is used to drive the fourth limiting component 240 to move within the fourth channel 270.

[0039] Understandably, by setting the first adjustment component 170, the second adjustment component 180, the third adjustment component 280, and the fourth adjustment component 290, the first adjustment component 170, the second adjustment component 180, the third adjustment component 280, and the fourth adjustment component 290 can be moved precisely, thereby precisely controlling the positions of the first sphere 110, the second sphere 130, the third sphere 210, and the fourth sphere 230. This allows the multi-dimensional optical path adjustment device of the nonlinear optical crystal to precisely control the nonlinear optical crystal 400 to translate in the x-axis or y-axis direction and rotate around the y-axis or z-axis direction, thereby improving the positioning accuracy of the nonlinear optical crystal 400.

[0040] Reference Figure 2 In some embodiments, at least one of the first adjustment component 170, the second adjustment component 180, the third adjustment component 280, and the fourth adjustment component 290 includes: a threaded mechanism 171, a top ball 172, and a piezoelectric ceramic 173, which are sequentially arranged in the channel to drive the corresponding limiting component to move.

[0041] Understandably, to improve the ease of installation of each adjustment component, the threaded mechanism 171 is fixedly connected to the corresponding channel via a washer 175. Specifically, the washer 175 is cylindrical, with its outer diameter matching the inner diameter of the channel. The washer 175 has threads inside that match the threaded mechanism 171, allowing the threaded mechanism 171 to be detachably fixed in the channel via the washer 175. Here, taking the first adjustment component 170 as an example, the threaded mechanism 171, washer 175, top ball 172, and piezoelectric ceramic 173 are sequentially arranged in the first channel 150, so that when the threaded mechanism 171 is rotated, the top ball 172 can push the piezoelectric ceramic 173 and the first limiting component 120, precisely fixing the first ball 110 in a preset position.

[0042] It should be noted that in other embodiments, the first adjustment component 170, the second adjustment component 180, the third adjustment component 280 and the fourth adjustment component 290 can use a motor drive to control the position of the limit component, thereby controlling the position of the corresponding ball. The specific driving method is not limited here.

[0043] Reference Figure 2 , 5 In some embodiments, the piezoelectric ceramic 173 is connected to an external voltage adjustment device by means of an electrical connection wire led out through a groove 152 formed on the channel side.

[0044] It should be noted that piezoelectric ceramic 173 is a functional ceramic material capable of converting mechanical energy and electrical energy into each other. Piezoelectric ceramic 173 utilizes the piezoelectric effect, where the material's internal positive and negative charge centers shift relative to each other under mechanical stress, resulting in polarization and the appearance of bound charges of opposite signs on the surfaces at both ends of the material. This gives it sensitive properties. By setting fine grooves 152 within the first channel 150 and the third channel 260 to lead out the connecting wires of piezoelectric ceramic 173, an external voltage adjustment device can precisely control the voltage applied to piezoelectric ceramic 173, thereby adjusting the pressure applied by piezoelectric ceramic 173 to the first limiting component 120 and the third limiting component 220, and thus precisely adjusting the positions of the first sphere 110 and the third sphere 210. For example, by applying voltage, the piezoelectric ceramic 173 can provide submicron-level displacement to move the first limiting component 120 and the third limiting component 220, causing the first sphere 110 and the third sphere 210 to move and drive the second platform 200 and the third platform 300 to precisely adjust their positions, thereby achieving precise fine-tuning of the position of the nonlinear optical crystal 400. Therefore, the positions of the first sphere 110 and the third sphere 210 can be precisely adjusted by an external voltage adjustment device, facilitating precise adjustment and improving the usability of the multi-dimensional optical path adjustment device for the nonlinear optical crystal.

[0045] In some embodiments, a sapphire gasket 174 is also included, which is disposed between the top bead 172 and the piezoelectric ceramic 173, and / or between the piezoelectric ceramic 173 and the corresponding limiting component.

[0046] Understandably, the sapphire gasket 174 possesses excellent scratch and wear resistance, high hardness, and extremely low deformation characteristics, effectively preventing the piezoelectric ceramic 173 from splitting under stress while ensuring the accuracy of force transmission. Between the top bead 172 and the piezoelectric ceramic 173, and between the piezoelectric ceramic 173 and the first limiting component 120, it effectively protects the piezoelectric ceramic 173, preventing it from breaking under high pressure. It also facilitates precise adjustment of the positions of the first sphere 110 and the third sphere 210 by the piezoelectric ceramic 173, thereby improving the service life of the multi-dimensional optical path adjustment device of the nonlinear optical crystal.

[0047] Reference Figure 2 , 3 In some embodiments, the accommodating portion 330 includes two light-transmitting windows 331 and an accommodating body 332. The two light-transmitting windows 331 are both located in the x-axis direction to meet the incident light in the x-axis direction. The accommodating body 332 is provided with a placement position 333 for a nonlinear optical crystal 400, which is located between the two light-transmitting windows 331.

[0048] It is understandable that by setting the light-transmitting window 331 and the housing body 332, the nonlinear optical crystal 400 can be stably fixed in the placement position 333. At the same time, the light-transmitting window 331 seals the housing body 332 to prevent impurities from entering the housing body 332 and affecting the optical performance of the nonlinear optical crystal 400, thereby improving the working stability of the multi-dimensional optical path adjustment device of the nonlinear optical crystal.

[0049] In some embodiments, the receiving portion 330 further includes an annular cover 334, both the annular cover 334 and the receiving body 332 are provided with a plurality of screw holes 335, and the annular cover 334 locks the light-transmitting window 331 to the receiving body 332 by screws 336.

[0050] It is understandable that by setting the annular cover 334, screw hole 335 and screw 336, the screw 336 can be inserted into the screw hole 335 on the annular cover 334 and the receiving body 332 in sequence. After tightening, the annular cover 334 fixes the light-transmitting window 331, preventing the receiving part 330 from becoming loose during operation, and also preventing impurities from entering the receiving body 332, thereby improving the structural stability of the multi-dimensional optical path adjustment device of the nonlinear optical crystal.

[0051] Reference Figure 1 , 4In some embodiments, the receiving portion 330 further includes an exhaust hole 337 and two intake pipes 338. The two intake pipes 337 are symmetrically arranged with respect to the placement position of the nonlinear optical crystal, and the exhaust hole 337 is located between the two intake pipes 338. The intake pipes 338 are used to connect to an external hot gas conveying device, or the intake pipes 338 are used to connect to an external gas conveying device and are covered with a heating strip.

[0052] Understandably, to ensure precise and rapid adjustment of the nonlinear optical crystal 400, an air inlet pipe 338 is provided to supply hot air into the housing 330, thereby increasing the temperature of the nonlinear optical crystal 400 and changing its refractive index for different wavelengths of light, thus compensating for phase differences. In some embodiments, the air inlet pipe 338 is directly connected to an external hot air delivery device, directly delivering hot air generated by the external device into the housing 330. Alternatively, a heating strip can be placed over the air inlet pipe 338 to directly heat the air passing through it before delivering it into the housing 330, achieving precise temperature control of the nonlinear optical crystal 400. Heating via air blowing through the air inlet pipe 338 results in a more uniform temperature rise in the nonlinear optical crystal 400. Compared to direct resistance heating, the hot air heating method significantly improves temperature uniformity, avoids localized hot spots in the optical crystal 400, ensures phase matching consistency throughout the entire volume of the optical crystal 400, and maximizes conversion efficiency.

[0053] Understandably, to ensure uniform heating of the nonlinear optical crystal 400, two air inlet pipes 338 are required so that both ends of the nonlinear optical crystal 400 can simultaneously contact hot air, achieving a uniform heating effect. Furthermore, to prevent excessive pressure within the housing 330, which could affect the lifespan of the nonlinear optical crystal 400, a small air outlet 337 is provided between the two air inlet pipes 338 to expel excess air from the housing 330. Simultaneously, the continuous discharge of air from the housing 330 through the air outlet 337 effectively prevents impurities in the air from entering the housing 330 through the outlet 337, reducing contamination of the nonlinear optical crystal 400 and improving the operational stability of the multi-dimensional optical path adjustment device for the nonlinear optical crystal. By working together with two air inlet pipes 338 and multiple air outlet holes 337, a slight positive pressure is maintained within the housing 330, effectively preventing external dust and other contaminants from entering. This significantly extends the service life of the nonlinear optical crystal 400 and maintains its optical quality. The combination of uniform heating and positive pressure helps achieve excellent thermal stability and environmental isolation, ensuring that the nonlinear optical crystal 400 operates under optimal conditions.

[0054] In some embodiments, the accommodating portion 330 further includes a temperature sensor, which is used to connect to an external PID feedback control system to control the operating state of the external hot air conveying device or to control the operating state of the heating belt.

[0055] Understandably, by setting up a temperature sensor, the temperature of the nonlinear optical crystal 400 can be accurately obtained. This allows the PID feedback control system to quickly and accurately adjust the temperature of the nonlinear optical crystal 400 via an external hot air delivery device or heating belt, thereby improving the response speed and adjustment efficiency of the multi-dimensional optical path adjustment device of the nonlinear optical crystal. Specifically, a PT1000 resistor is used as the temperature sensor to accurately measure the temperature of the nonlinear optical crystal 400 and provide feedback control, ensuring temperature stability and accuracy.

[0056] It should be noted that the multi-dimensional optical path adjustment device for nonlinear optical crystals provided in this application embodiment can perform combinations of five independent degrees of freedom, including translation along the z-axis, translation along the y-axis, rotation around the y-axis, rotation around the z-axis, and temperature adjustment, providing precise and stable phase matching control for various nonlinear optical crystals 400 and applications. It provides a highly specialized and optimized nonlinear optical adjustment tool for nonlinear optical crystals 400, meeting various phase matching requirements.

[0057] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0058] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0059] The above is a detailed description of the preferred embodiments of this application. However, this application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A multi-dimensional optical path adjustment device for a nonlinear optical crystal, characterized in that, include: The first platform includes a first sphere, a first limiting component, a second sphere, and a second limiting component; the first limiting component and the second limiting component are restricted to moving only along the y-axis direction, the first limiting component has a first inverted trapezoidal groove, and the second limiting component has two second inverted trapezoidal grooves; The second platform includes a third sphere, a third limiting component, a fourth sphere, and a fourth limiting component; the third limiting component and the fourth limiting component are restricted to moving only along the z-axis direction; the third limiting component has a third inverted trapezoidal groove, and the fourth limiting component has two fourth inverted trapezoidal grooves; the second platform also includes a first V-groove and a second V-groove. The third platform includes a third V-groove, a fourth V-groove, and a accommodating portion for placing the nonlinear optical crystal; The first inverted trapezoidal groove and the first V-shaped groove mate to accommodate the first sphere, both of which are grooves along the x-axis. The two second inverted trapezoidal grooves and the second V-shaped grooves mate to accommodate the two second spheres, with the second inverted trapezoidal grooves along the x-axis and the second V-shaped grooves along the y-axis. The third inverted trapezoidal groove and the third V-shaped groove mate to accommodate the third sphere, both of which are grooves along the x-axis. The two fourth inverted trapezoidal grooves and the fourth V-shaped grooves mate to accommodate the two fourth spheres, with the fourth inverted trapezoidal grooves along the x-axis and the fourth V-shaped grooves along the z-axis.

2. The multi-dimensional optical path adjustment device according to claim 1, characterized in that, The first platform is a plate-like structure placed in the xy plane. The first platform also includes a first channel, a second channel, a first through hole, and a second through hole. The first channel extends along the y-axis direction, the first limiting component is disposed in the first channel, the first through hole is connected to the first channel along the z-axis direction, and the first inverted trapezoidal groove, the first through hole, and the first V-shaped groove cooperate to accommodate the first sphere. The second channel extends along the y-axis direction, the second limiting component is disposed in the second channel, the second through hole is connected to the second channel along the z-axis direction, and the second inverted trapezoidal groove, the second through hole, and the second V-shaped groove cooperate to accommodate the second sphere. The second platform has an L-shaped structure, including a plate-like structure placed in the xy plane and a plate-like structure placed in the xz plane. The second platform also includes a third channel, a fourth channel, a third through hole, and a fourth through hole. The third channel extends along the z-axis direction, the third limiting component is disposed in the third channel, and the third through hole connects to the third channel along the y-axis direction. The third inverted trapezoidal groove, the third through hole, and the third V-shaped groove cooperate to accommodate the third sphere. The fourth channel extends along the z-axis direction, the fourth limiting component is disposed in the fourth channel, the fourth through hole connects to the fourth channel along the y-axis direction, and the fourth inverted trapezoidal groove, the fourth through hole, and the fourth V-shaped groove cooperate to accommodate the fourth sphere.

3. The multi-dimensional optical path adjustment device according to claim 2, characterized in that, The first platform further includes a first adjustment component and a second adjustment component, wherein the first adjustment component is used to drive the first limiting component to move within the first channel, and the second adjustment component is used to drive the second limiting component to move within the second channel; The second platform further includes a third adjustment component and a fourth adjustment component. The third adjustment component is used to drive the third limiting component to move within the third channel, and the fourth adjustment component is used to drive the fourth limiting component to move within the fourth channel.

4. The multi-dimensional optical path adjustment device according to claim 3, characterized in that, At least one of the first adjustment component, the second adjustment component, the third adjustment component, and the fourth adjustment component includes: a threaded mechanism, a top ball, and a piezoelectric ceramic, wherein the threaded mechanism, the top ball, and the piezoelectric ceramic are sequentially arranged in the channel to drive the corresponding limiting component to move.

5. The multi-dimensional optical path adjustment device according to claim 4, characterized in that, The piezoelectric ceramic has an electrical connection wire led out through a groove on the channel side to connect to an external voltage adjustment device.

6. The multi-dimensional optical path adjustment device according to claim 4, characterized in that, It also includes a sapphire gasket disposed between the top bead sphere and the piezoelectric ceramic, and / or disposed between the piezoelectric ceramic and the corresponding limiting component.

7. The multi-dimensional optical path adjustment device according to claim 1, characterized in that, The accommodating part includes two light-transmitting windows and an accommodating body. Both light-transmitting windows are located in the x-axis direction to meet the incident light in the x-axis direction. The accommodating body is provided with a placement position for a nonlinear optical crystal, which is located between the two light-transmitting windows.

8. The multi-dimensional optical path adjustment device according to claim 7, characterized in that, The accommodating part also includes an annular pressure cover. Both the annular pressure cover and the accommodating body are provided with multiple screw holes. The annular pressure cover locks the light-transmitting window to the accommodating body by screws.

9. The multi-dimensional optical path adjustment device according to claim 1, characterized in that, The accommodating part further includes an air outlet and two air inlet pipes. The two air inlet pipes are symmetrically arranged with respect to the placement position of the nonlinear optical crystal. The air outlet is located between the two air inlet pipes. The air inlet pipes are used to connect to an external hot gas delivery device, or the air inlet pipes are used to connect to an external gas delivery device and are covered with a heating strip.

10. The multi-dimensional optical path adjustment device according to claim 9, characterized in that, The accommodating part also includes a temperature sensor, which is used to connect to an external PID feedback control system to control the working state of the external hot air conveying device or the working state of the heating belt.

Images