Laser synchronous transmission system and method based on rotary motion mechanism and application

Abstract

The invention discloses a laser synchronous transmission system and method based on a rotary motion mechanism and application, and belongs to the technical field of laser wireless energy transmission. The system comprises a static end and a rotary end of which the geometric centers are located on the same rotation axis; the static end is provided with a multimode optical fiber used for transmitting laser energy and a transmitting end single-mode optical fiber used for transmitting laser signals, the transmitting end single-mode optical fiber is provided with a transmitting end optical fiber collimator group, and the output of the multimode optical fiber is sequentially connected with a square optical fiber array and a lens array; the rotating end is provided with a laser cell panel for receiving laser energy, a receiving end optical fiber collimator for receiving laser signals and a receiving end single-mode optical fiber; and the square optical fiber array is connected to the transmitting end optical fiber collimator group. According to the invention, the stability and anti-interference performance of energy and signal cooperative transmission in the rotating mechanism are improved, the processing and assembling difficulty is reduced, the reliability of the system in a complex environment is improved, and long-term stable cooperative operation of higher-power laser and high-speed communication is supported.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser wireless energy transmission, and in particular relates to a laser synchronous transmission system, method and application based on a rotary motion mechanism. Background Art

[0002] Laser wireless energy transmission technology, with its high directionality and contactless power supply, shows potential as a viable alternative to traditional electrical contact transmission in rotating mechanical systems. However, challenges with dynamic optical path alignment, heat accumulation during high-power transmission, and a sharp drop in photoelectric efficiency due to rotational misalignment hinder its practical application in engineering applications. Meanwhile, while laser communication technology can achieve high-speed, interference-resistant signal transmission through optical carrier modulation, it faces difficulties in continuously tracking the communication beam in rotating scenarios, and stray light from high-energy lasers can easily interfere with the signal channel. Existing synchronous transmission schemes often use time-division multiplexing or heterogeneous carriers (e.g., laser for energy and radio frequency for signal) to achieve co-transmission of energy and information. However, these schemes suffer from high transmission latency, spectrum resource conflicts, and significant increases in system complexity. In particular, when the energy and signal lasers are transmitted coaxially, fluctuations in the energy beam intensity can easily degrade the signal-to-noise ratio of the communication signal. Developing a low-interference, highly reliable synchronous optical energy-signal transmission system in dynamic rotating mechanisms has become a key technical bottleneck for improving the performance of high-end equipment.

[0003] As an improvement, in the current literature, Chinese patent CN117353818A proposes a method for simultaneous transmission of signals and energy, which transmits multi-wavelength energy light waves and information light waves through a transmitting module, uses NANF hollow-core optical fiber for low-loss transmission, and uses diffraction grating wave splitting technology to accurately project the energy wavelength and information wavelength light spots to different areas of the composite receiving module. The energy light spot is converted into current by a distributed photovoltaic converter array, and the information light spot is analyzed into an electrical signal by a photodetector. The combination of polarization modulation and wavelength isolation technology significantly reduces signal interference. This method effectively breaks through the limitations of low power threshold and high loss of traditional optical fiber energy transmission through the high power carrying capacity of hollow-core optical fiber, multi-wavelength beam splitting transmission and modular receiving design, and realizes efficient coordinated transmission of information and energy. At the same time, it supports flexible configuration of the signal-energy transmission ratio by adjusting the layout of photovoltaic and photoelectric units at the receiving end. Chinese patent CN116191694A proposes a laser wireless energy and information synchronous transmission system. This system, through a parallel circuit design for the laser power supply, separates the energy supply circuit from the signal control circuit, providing a stable target energy drive current and a modulated signal drive current, respectively. This avoids damage to the device caused by direct modulation of traditional high-power lasers. The system also uses a photovoltaic cell receiver to synchronously convert the laser light into stable electrical energy and high-quality electrical signals, achieving efficient coordination between energy transmission and data communication. This addresses the existing issues of short laser life, large energy fluctuations, and severe signal interference. Chinese patent CN114675380A proposes a laser energy supply method and system for optical fiber energy and signal co-transmission. This system transmits a high-wavelength laser energy signal (e.g., 1450 nm) above 1400 nm and a low-wavelength communication signal (e.g., 1310 nm) on the substation side, using the same fiber for transmission. The signals are then separated by a wavelength division multiplexer on the tower side. The photocell converts laser energy into electrical energy and stores it in a supercapacitor, combined with an intermittent power supply mechanism: when the supercapacitor is charging, the sensor is in microampere low-power mode, and switches to milliampere operation mode after it is fully charged. Through the efficient light transmission characteristics of the InP material photocell and the capacitor charge and discharge control, it solves the problem of continuous power supply for sensor nodes in long-distance common fiber transmission of more than 5 kilometers, and can support the stable operation of multiple types of sensors such as temperature and image.However, existing technologies still face significant limitations in the field of signal-energy co-transmission. First, most solutions rely on precision optical components such as hollow-core optical fibers and diffraction gratings (e.g., CN117353818A), resulting in complex system structures and demanding assembly precision. Furthermore, multi-wavelength beam splitting transmission is susceptible to limitations in beam projection accuracy. Second, traditional circular beams with fixed receiving arrangements (e.g., CN114675380A) struggle to adapt to the dynamic motion of rotating mechanisms, leading to fluctuations in photoelectric conversion efficiency due to beam misalignment. Furthermore, the intermittent power supply of supercapacitors cannot meet sustained high power demands. Furthermore, existing technologies often rely on mechanical electrical contact or traditional fiber coupling (e.g., CN116191694A), which poses risks of electromagnetic interference, physical friction loss, and interface oxidation, resulting in insufficient long-term reliability. These deficiencies collectively limit the system's stability, interference resistance, and maintenance-free operation in rotating scenarios, making it difficult to achieve high-efficiency signal-co-transmission under complex operating conditions. Therefore, in summary, the multi-wavelength beam splitting transmission of the current laser synchronous transmission system is easily limited by the accuracy of the light spot projection; it is difficult to adapt to the dynamic motion scenarios of the rotating mechanism, and it is easy to cause fluctuations in the photoelectric conversion efficiency due to the misalignment of the light spot, and the intermittent power supply mode of the supercapacitor cannot meet the continuous high power demand; there are risks of electromagnetic interference sensitivity, physical friction loss and interface oxidation, and the operational reliability is insufficient. Summary of the Invention

[0004] The present invention provides a laser synchronous transmission system, method and application based on a rotary motion mechanism, aiming to solve the problems of the current laser synchronous transmission system, namely, that the multi-wavelength beam splitting transmission is easily limited by the accuracy of the light spot projection; that it is difficult to adapt to the dynamic motion scene of the rotating mechanism, that the photoelectric conversion efficiency fluctuates easily due to the misalignment of the light spot, and that the intermittent power supply mode of the supercapacitor cannot meet the continuous high power demand; that there are problems such as sensitivity to electromagnetic interference, physical friction loss and interface oxidation risks, and insufficient operational reliability.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: The present invention provides a laser synchronous transmission system based on a rotary motion mechanism, comprising a stationary end and a rotating end, wherein the geometric centers of the stationary end and the rotating end are located on the same rotation axis, wherein: The stationary end is provided with a multimode optical fiber for transmitting laser energy and a transmitting end single-mode optical fiber for transmitting laser signals. The transmitting end single-mode optical fiber is equipped with a transmitting end optical fiber collimator group. The output of the multimode optical fiber is connected to a square optical fiber array and a lens array in sequence. The rotating end is provided with a laser solar panel for receiving laser energy and a receiving end optical fiber collimator and a receiving end single-mode optical fiber for receiving laser signals; the laser solar panel is provided with a load path; The square fiber array consists of multiple square optical fibers, and the output end of each square optical fiber is connected to the optical fiber collimator group at the transmitting end; the optical fiber collimator at the receiving end expands and shapes the laser energy into a square flat-top beam, which is combined to form a square hollow flat-top beam with a hollow area in the center. The output optical path of the single-mode optical fiber at the transmitting end is located in the hollow area.

[0006] Furthermore, the lens array adopts a spherical lens, and the output ends of multiple square optical fibers are combined with the spherical lens to expand and shape the laser energy into a square flat-top beam.

[0007] In some embodiments, a plurality of square optical fibers are arranged in a ring to form a square optical fiber array, and the shape of the hollow region matches the output light path cross section of the single-mode optical fiber at the emitting end.

[0008] In some embodiments, the light-receiving surface of the laser solar panel is a circular photovoltaic panel, and the minimum circumscribed circle diameter of the square flat-top beam is not less than the diameter of the light-receiving surface.

[0009] In some embodiments, the transmitting end fiber collimator group includes a single-mode fiber collimator and multiple fiber collimators surrounding the single-mode fiber collimator. The output of the square fiber is collimated by the corresponding fiber collimator, and the output of the transmitting end single-mode fiber is collimated by the single-mode fiber collimator.

[0010] Furthermore, the receiving end optical fiber collimator is nested and is used to receive the laser signal collimated by the single-mode optical fiber collimator.

[0011] In some embodiments, the load path includes wires connected to the laser solar panel, the wires are provided with a laser charging module, and the laser charging module is configured with a load.

[0012] Furthermore, the geometric centers of the square optical fiber array, the transmitting end optical fiber collimator group, the lens array, the laser solar panel, the receiving end optical fiber collimator, the wires, the laser charging module and the load are all located on the same rotation axis and are distributed in a circular symmetrical manner around the rotation axis.

[0013] The present invention also provides a method for a laser synchronous transmission system based on a rotary motion mechanism. The method is based on the above-mentioned laser synchronous transmission system based on a rotary motion mechanism, and the method includes: Laser energy transmission: The laser light source passes through the multimode optical fiber and square optical fiber array, and is then expanded and collimated by the optical fiber collimator group at the transmitting end and the optical fiber collimator at the receiving end, and then irradiates the laser cell. After photoelectric conversion, the light energy is converted into electrical energy, and then transmitted to the load path; Laser communication process: The laser beam signal passes through the transmitting end single-mode optical fiber and the transmitting end optical fiber collimator group, is expanded and collimated into parallel light, and then is received by the receiving end optical fiber collimator and the receiving end single-mode optical fiber to realize signal transmission.

[0014] The present invention also provides an application of a laser synchronous transmission system based on a rotary motion mechanism. The laser synchronous transmission system can be applied to medical equipment, aerospace equipment, and consumer electronic equipment.

[0015] The present invention provides a laser synchronous transmission system, method and application based on a rotary motion mechanism, which have the following beneficial effects.

[0016] The present invention relates to a laser synchronous transmission system based on a rotary motion mechanism. This system utilizes a structural design in which axisymmetric components are arranged concentrically with the rotation axis, combined with a flat-top beam formed by square fiber beam expansion. This ensures that the energy spot completely covers the photovoltaic area at the receiving end during rotation, completely resolving the energy transmission efficiency fluctuations caused by mechanical misalignment in traditional circular light spots and enabling continuous, stable, synchronous transmission of energy and signals within the rotating mechanism. The present invention utilizes a modular optical path design using standardized multimode and single-mode optical fibers, replacing existing solutions that rely on complex optical components such as hollow-core optical fibers and diffraction gratings. This significantly reduces the difficulty of optical system processing and assembly, while also eliminating the need for precision calibration steps. This makes the overall structure more compact, less expensive, and easier to deploy and maintain on a large scale.

[0017] In addition, the energy transmission and signal communication of the present invention adopt an independent wavelength and physically isolated optical path design to avoid the risk of co-frequency interference and thermal damage; the all-optical link and contactless optical coupling interface completely eliminate the friction loss, oxidation hazards and electromagnetic sensitivity problems of traditional mechanical electrical contact, greatly improving the reliability of the system in complex environments. The present invention realizes the spatial separation of energy and communication channels through the topological layout of square flat-top beam outer ring transmission of energy and central single-mode optical fiber transmission of signal, which not only ensures that high-power energy transmission is not subject to signal interference, but also balances the thermal distribution characteristics through optical path geometry optimization, supporting the long-term stable coordinated operation of higher-power lasers and high-speed communications. Overall, the present invention takes dynamic spot coverage, all-optical contactless transmission and modular design as the core, and systematically improves the stability and low anti-interference performance of the coordinated transmission of energy and signals in the rotating mechanism, as well as the high maintenance cost, and provides a system with a streamlined structure, reliable operation and better life cycle cost for the rotating motion mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings in the specification are used to provide further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 This is a structural schematic diagram of a laser synchronous transmission system based on a rotary motion mechanism of the present invention; Figure 2This is a schematic structural diagram of a square optical fiber array in a laser synchronous transmission system based on a rotary motion mechanism according to the present invention; Figure 3 The figure is a schematic structural diagram of a transmitting end optical fiber collimator group in a laser synchronous transmission system based on a rotary motion mechanism according to the present invention.

[0020] Among them, 1, the stationary end, 2, the rotating end; 5. Laser solar panel, 6. Wires, 7. Receiver fiber collimator, 8. Receiver single-mode fiber, 9. Laser charging module, 10. Load, 11. Multimode fiber; 100. Square fiber array, 101. Square fiber, 200. Transmitter single-mode fiber, 300. Lens array, 301. Fiber collimator, 400. Single-mode fiber collimator. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0024] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "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 or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0027] How to provide a laser synchronous transmission system that can improve the system's stability, anti-interference and maintenance-free performance in rotating scenarios, so that the subsystem can be suitable for high-efficiency signal collaborative transmission under complex working conditions, thereby improving long-term operation reliability.

[0028] like Figure 1 and Figure 2 As shown, the present invention proposes a laser synchronous transmission system based on a rotary motion mechanism, comprising a stationary end 1 and a rotating end 2, wherein the geometric centers of the stationary end 1 and the rotating end 2 are located on the same rotation axis, wherein: The stationary end 1 is provided with a multimode optical fiber 11 for transmitting laser energy and a transmitting end single-mode optical fiber 200 for transmitting laser signals. The transmitting end single-mode optical fiber 200 is equipped with a transmitting end optical fiber collimator group. The output of the multimode optical fiber 11 is connected to a square optical fiber array 100 and a lens array 300 in sequence. The rotating end 2 is provided with a laser solar panel 5 for receiving laser energy and a receiving end optical fiber collimator 7 and a receiving end single-mode optical fiber 8 for receiving laser signals; the laser solar panel 5 is provided with a load path; The square fiber array 100 is composed of multiple square optical fibers 101, and the output end of each square optical fiber 101 is connected to the transmitting end optical fiber collimator group; the transmitting end optical fiber collimator expands and shapes the laser energy into a square flat-top beam, which is combined to form a square hollow flat-top beam with a hollow area in the center. The output light path of the transmitting end single-mode optical fiber 200 is located in the hollow area.

[0029] The existing technology of signal-energy co-transmission has significant limitations in rotating scenarios: reliance on complex optical components makes system integration difficult; traditional circular light spots are prone to fluctuations in energy transmission efficiency due to rotational dislocation; mechanical electrical contacts are subject to the risk of wear, oxidation, and electromagnetic interference; co-frequency transmission is limited by thermal damage, making it difficult to balance high power and stability; fixed designs cannot adapt to dynamic rotation requirements and have high maintenance costs. The present invention proposes a laser synchronous transmission system based on a rotating motion mechanism. In response to the above-mentioned defects of the existing technology, a geometrically adapted square flat-top beam is used to achieve dynamic full coverage of the light spot during rotation, eliminating transmission efficiency fluctuations; a contactless all-optical link and energy and signal spatial isolation design are used to greatly reduce the impact of physical wear and electromagnetic interference, reduce mutual interference between different channels, and improve system reliability and service life; a modular fiber array is combined with standardized optical components to reduce system complexity and cost, achieve high-power energy transmission, high-speed and stable communication, and long-term maintenance-free operation in rotating mechanism scenarios, and provide an efficient and reliable integrated signal-energy co-transmission solution for rotating motion mechanisms.

[0030] like Figure 2 As shown, in some embodiments, the lens array 300 of the present invention utilizes a spherical lens, and the output ends of multiple square optical fibers 101 are combined with the spherical lens to expand and shape the laser energy into a square flat-top beam. The square optical fibers 101 are arranged in a ring to form the square optical fiber array 100, and the shape of the hollow region matches the cross-section of the output optical path of the transmitting single-mode optical fiber 200. The light-receiving surface of the laser solar panel 5 of the present invention is a circular photovoltaic panel, and the minimum circumscribed circle diameter of the square flat-top beam is not less than the diameter of the light-receiving surface. Because co-frequency transmission in the prior art is prone to thermal damage, and multi-wavelength beam splitting technology is limited by the device's heat dissipation capacity, the present invention achieves natural isolation between the energy ring and the central signal channel through a square hollow flat-top beam, which not only avoids co-frequency interference but also optimizes thermal distribution characteristics, supports higher-power laser transmission, breaks through the heat dissipation limitations of traditional solutions, and can achieve efficient coordinated management of energy and signal. In addition, the circular spot and fixed receiving design of the prior art are prone to unstable energy transmission due to spot deviation during rotation, and the intermittent power supply mode cannot meet the continuous high power requirements. The present invention adopts a square flat-top beam and a geometric tangent configuration of the receiving end. Through the dynamic envelope of the light spot, it ensures that the energy beam completely covers the light-receiving surface at any rotation angle, significantly improving the dynamic transmission stability, completely solving the efficiency attenuation problem caused by mechanical dislocation in traditional solutions, and improving the stability of dynamic transmission in rotating scenes.

[0031] like Figure 3As shown, in the laser synchronous transmission system of the present invention, the transmitting end optical fiber collimator group includes a single-mode optical fiber collimator 400 and a plurality of optical fiber collimators 301 surrounding the single-mode optical fiber collimator 400. The output of the square optical fiber 101 is collimated by the corresponding optical fiber collimator 301, and the output of the transmitting end single-mode optical fiber 200 is collimated by the single-mode optical fiber collimator 400. The receiving end optical fiber collimator 7 of the present invention is nested, and the receiving end optical fiber collimator 7 is used to receive the laser signal after collimation by the single-mode optical fiber collimator 400. Since the existing technology relies on complex optical wave splitting elements or electrical signal modulation technology, the system integration is low and there is a risk of electromagnetic interference. The present invention adopts square optical fiber beam expansion and shaping and multi-layer coaxial optical path design to achieve physical isolation and spatial coordinated transmission of energy and signal light. The structure is compact and does not require precise adjustment. The all-optical link completely avoids the electrical contact link, and can still ensure the signal transmission quality in a complex electromagnetic environment, and the anti-interference ability is greatly improved.

[0032] Moreover, because the existing technology uses mechanical electrical contact and other methods, friction and wear may occur, or performance degradation may occur due to surface oxidation, and frequent maintenance is required. The present invention uses non-contact optical coupling, which eliminates problems such as friction and wear, eliminates the risk of wear and contamination during the rotation process, and significantly extends the life of the system. It is particularly suitable for high-speed, high-precision industrial scenarios, and greatly reduces operation and maintenance costs. Moreover, because the existing technology relies on special optical fibers or customized optical components, it is expensive and difficult to deploy on a large scale. The present invention is based on standardized optical fibers and modular optical components, and is flexibly adapted to different power requirements through an expandable optical fiber array design, significantly reducing system costs, and is easy to mass produce and customize for specific scenarios. The present invention systematically improves the dynamic stability, anti-interference and long-term reliability of signal and energy co-transmission in rotating mechanism scenarios through a geometrically circumscribed optical path topology, spatial isolation of energy and signal, and non-contact and anti-pollution transmission, providing a simpler, more robust and lower-maintenance system for industrial automation, high-end equipment and other fields.

[0033] Furthermore, the load path of the present invention includes a wire 6 connected to the laser solar panel 5, a laser charging module 9 provided with the wire 6, and a load 10 configured in the laser charging module 9. The geometric centers of the square fiber array 100, the transmitting-end fiber collimator assembly, the lens array 300, the laser solar panel 5, the receiving-end fiber collimator 7, the wire 6, the laser charging module 9, and the load 10 of the present invention are all located on the same rotation axis and are annularly symmetrically distributed around the rotation axis.

[0034] The present invention further provides a laser synchronous transmission method based on a rotary motion mechanism. The method is based on the laser synchronous transmission system based on a rotary motion mechanism of the present invention, and the method includes: Laser energy transmission: The laser light source passes through the multimode optical fiber 11 and the square optical fiber array 100, is expanded and collimated by the optical fiber collimator group at the transmitting end, and then irradiates the laser cell 5. After photoelectric conversion, the light energy is converted into electrical energy and then transmitted to the load path; Laser communication process: The laser beam signal is expanded and collimated into parallel light after passing through the transmitting end single-mode optical fiber 200 and the transmitting end optical fiber collimator group, and then received by the receiving end optical fiber collimator 7 and the receiving end single-mode optical fiber 8 to realize signal transmission.

[0035] In some embodiments, the 808nm laser light source of the present invention passes through the multimode optical fiber 11 and the square optical fiber 101, is expanded and collimated by the optical fiber collimator 301, and then irradiates the 808nm laser battery 5. After photoelectric conversion, the light energy is converted into electrical energy, which is transmitted to the laser charging module 9 through the wire 6, and then the electrical energy is transmitted to the load 10. The above is laser energy transmission.

[0036] The 1550nm laser beam of the present invention passes through the transmitting end single-mode optical fiber 200 and the single-mode optical fiber collimator 400, is expanded and collimated into parallel light, and is then received by the receiving end optical fiber collimator 7 and the receiving end single-mode optical fiber 8 to realize signal transmission. The above is the laser communication process.

[0037] As an option, the device in the stationary end 1, the laser solar panel 5 in the rotating end 2 and the receiving end optical fiber collimator 7 of the present invention are arranged axially symmetrically, with the central axis coinciding with the rotation axis, and the rotation process does not affect the synchronous transmission of energy and signals.

[0038] The signal synchronization transmission system of the present invention is a laser wireless energy and signal synchronization transmission system between relatively rotating mechanisms. It uses energy transmission optical fiber to transmit a laser beam with a wavelength of 808nm, achieving high-efficiency energy transmission and reducing energy transmission loss. It also uses single-mode optical fiber to transmit a laser beam with a wavelength of 1550nm, achieving high-speed, large-capacity, high-bandwidth and stable signal transmission. The collaborative transmission design has a simple structure, low cost, high reliability, and reduces system complexity. The present invention uses a square optical fiber 101 in combination with a spherical lens to achieve beam expansion and shaping of the energy transmission beam, forming a square flat-top beam; then the square flat-top beam is combined into a square hollow flat-top beam through an optical fiber array. The hollow area is square, so that energy transmission and signal transmission are completely isolated in space, completely avoiding the risk of thermal damage to devices in traditional co-frequency transmission, while simplifying the integration of the optical system and reducing the assembly precision requirements.

[0039] This invention utilizes a geometrically circumscribed configuration of a square flat-top beam and a circular photovoltaic panel. This ensures that the energy beam always fully covers the panel's light-receiving surface during the relative motion of the rotating mechanism. By dynamically adapting the geometric envelope of the beam spot, this solves the problem of photoelectric conversion efficiency fluctuations caused by rotational misalignment in traditional circular beam spots, achieving stable energy transmission at any rotation angle.

[0040] The present invention integrates energy transmission, signal communication, and a rotating mechanism into a coaxial whole. Coaxial output of dual-wavelength light beams is achieved through multi-layer nested fiber collimators. Combined with a contactless optical coupling interface design, the system volume is significantly reduced while ensuring transmission efficiency. The system has the advantages of a simple overall structure, easy installation, and miniaturization. Furthermore, the present invention utilizes an all-optical link design, which is less susceptible to electromagnetic interference. The present invention replaces traditional mechanical electrical contact transmission with an all-optical link, eliminating physical friction and electrical contact oxidation between rotating mechanisms. Combined with anti-pollution optical interfaces (such as dust-repellent coatings and sealed packaging), the system achieves wear-free, maintenance-free, and highly reliable transmission, significantly extending the service life of the system.

[0041] In some optional embodiments, the laser synchronous transmission system of the present invention can utilize other wavelength combinations, such as 980nm energy light and 1310nm signal light, to achieve physical isolation between energy and signal by leveraging the transmission characteristics of optical fibers in different wavelength bands, effectively achieving dual-wavelength isolated transmission. However, this requires matching photovoltaic cells and photodetectors with corresponding wavelengths, which may result in slightly lower energy conversion efficiency due to differences in material absorption rates.

[0042] This invention replaces the square fiber array with a multi-core fiber. By separating the cores, it achieves spatially isolated transmission of energy and signals, simplifying the fiber layout. However, multi-core fiber processing is expensive and requires addressing crosstalk between cores. While overall performance is similar, the cost is increased.

[0043] The present invention can design a square flat-top beam into an annular or hexagonal spot, combined with a rotationally symmetric receiving end design to dynamically cover the photovoltaic area, with a similar geometric adaptation principle. However, the spot uniformity and edge coverage accuracy may be slightly inferior to those of a square flat-top beam. Of course, it is also possible to eliminate the square fiber expansion link and directly use a circular multimode fiber to transmit energy light, relying on high-precision mechanical adjustment to compensate for rotational offset. However, the easy offset of the spot leads to increased fluctuations in energy transmission efficiency, requiring frequent calibration, and increasing maintenance costs.

[0044] The present invention also provides an application of a laser synchronous transmission system based on a rotary motion mechanism, which can be applied to medical equipment, aerospace equipment, and consumer electronic equipment. Specifically: When applied to medical devices, such as rotating endoscopes or surgical robot joints, this invention requires simultaneous transmission of energy and high-definition imaging signals within a confined space. The miniaturized fiber collimator and low-power photovoltaic chip meet the medical device's requirements for miniaturization and biocompatibility.

[0045] This invention is used in aerospace applications, such as satellite solar panels, drone rotors, and rotating motion mechanisms, where rotating components require a signal-energy transmission system that is radiation-resistant and temperature-resistant. It utilizes radiation-resistant optical fiber materials and wide-temperature-range photovoltaic cells to enhance the package's impact resistance.

[0046] This invention is applied to consumer electronic devices, such as smartwatch crowns and rotating camera modules, requiring a wear-free, long-life miniaturized energy supply solution. The integration of ultra-fine multimode optical fibers with miniature optoelectronic devices meets the demand for lightweight, thin, and low-cost consumer electronics.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in this industry can smoothly implement the present invention as shown in the specification and described above. Any equivalent changes, modifications and evolutions made by using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A laser synchronous transmission system based on a rotary motion mechanism, characterized in that: It comprises a stationary end (1) and a rotating end (2), wherein the geometric centers of the stationary end (1) and the rotating end (2) are located on the same rotation axis, wherein: The stationary end (1) is provided with a multimode optical fiber (11) for transmitting laser energy and a transmitting end single-mode optical fiber (200) for transmitting laser signals, the transmitting end single-mode optical fiber (200) is provided with a transmitting end optical fiber collimator group, and the output of the multimode optical fiber (11) is sequentially connected to a square optical fiber array (100) and a lens array (300); The rotating end (2) is provided with a laser solar panel (5) for receiving laser energy, a receiving end optical fiber collimator (7) for receiving laser signals, and a receiving end single-mode optical fiber (8); the laser solar panel (5) is provided with a load path; The square optical fiber array (100) is composed of a plurality of square optical fibers (101), and the output end of each square optical fiber (101) is connected to a transmitting end optical fiber collimator group; the transmitting end optical fiber collimator group expands and shapes the laser energy into a square flat-top beam, which is combined to form a square hollow flat-top beam with a hollow area in the center, and the output light path of the transmitting end single-mode optical fiber (200) is located in the hollow area.

2. The laser synchronous transmission system based on the rotary motion mechanism according to claim 1, characterized in that: The lens array (300) adopts a spherical lens, and the output ends of the plurality of square optical fibers (101) are combined with the spherical lens to expand and shape the laser energy into a square flat-top beam.

3. The laser synchronous transmission system based on the rotary motion mechanism according to claim 1, characterized in that: A plurality of the square optical fibers (101) are arranged in a ring to form a square optical fiber array (100), and the shape of the hollow area matches the output light path cross section of the emitting end single-mode optical fiber (200).

4. The laser synchronous transmission system based on the rotary motion mechanism according to claim 1, characterized in that: The light-receiving surface of the laser solar panel (5) is a circular photovoltaic panel, and the minimum circumscribed circle diameter of the square flat-top light beam is not less than the diameter of the light-receiving surface.

5. The laser synchronous transmission system based on the rotary motion mechanism according to claim 1, characterized in that: The transmitting end optical fiber collimator group comprises a single-mode optical fiber collimator (400) and a plurality of optical fiber collimators (301) surrounding the single-mode optical fiber collimator (400); the output of the square optical fiber (101) is collimated by the corresponding optical fiber collimator (301); and the output of the transmitting end single-mode optical fiber (200) is collimated by the single-mode optical fiber collimator (400).

6. The laser synchronous transmission system based on the rotary motion mechanism according to claim 5, characterized in that: The receiving end optical fiber collimator (7) is arranged in a nested manner, and is used to receive the laser signal collimated by the single-mode optical fiber collimator (400).

7. The laser synchronous transmission system based on the rotary motion mechanism according to claim 1, characterized in that: The load path includes an electric wire (6) connected to the laser solar panel (5), the electric wire (6) is provided with a laser charging module (9), and the laser charging module (9) is configured with a load (10).

8. The laser synchronous transmission system based on the rotary motion mechanism according to claim 7, characterized in that: The geometric centers of the square optical fiber array (100), the transmitting end optical fiber collimator group, the lens array (300), the laser solar panel (5), the receiving end optical fiber collimator (7), the wire (6), the laser charging module (9), and the load (10) are all located on the same rotation axis and are annularly symmetrically distributed around the rotation axis.

9. A laser synchronous transmission method based on a rotary motion mechanism, characterized in that: The method is carried out based on the laser synchronous transmission system based on the rotary motion mechanism according to any one of claims 1 to 8, and the method comprises: Laser energy transmission: The laser light source passes through the multimode optical fiber (11) and the square optical fiber array (100), is expanded and collimated by the optical fiber collimator group at the transmitting end, and then irradiates the laser cell (5). After photoelectric conversion, the light energy is converted into electrical energy, and then transmitted to the load path; Laser communication process: The laser beam signal is expanded and collimated into parallel light after passing through the transmitting end single-mode optical fiber (200) and the transmitting end optical fiber collimator group, and then is received by the receiving end optical fiber collimator (7) and the receiving end single-mode optical fiber (8) to realize signal transmission.

10. An application of a laser synchronous transmission system based on a rotary motion mechanism, characterized in that: The laser synchronous transmission system can be applied to medical equipment, aerospace equipment, and consumer electronic equipment.

Images