Underwater coaxial double-light-source transmitting device and double-end high-speed optical communication method

Abstract

The invention provides an underwater coaxial double-light-source transmitting device and a double-end high-speed optical communication method, and relates to the field of space optical communication, the transmitting device comprises a signal source, a light source module, a control switch and an optical antenna; wherein the light source module comprises a first light source unit serving as a communication light source and a second light source unit serving as a beacon light source, and the optical axes of the first light source unit and the second light source unit are parallel; the light source center point of the first light source unit coincides with the light source center point of the second light source unit, the second light source unit comprises a plurality of second light sources, and the second light sources are arranged around the light source center point of the first light source unit in a central symmetry mode. According to the invention, the problem that large-range capture of beacon light and high-speed information transmission of communication light cannot be considered in special application scenes such as underwater and the like is solved.

Description

Technical Field

[0001] The present invention relates to the field of space optical communication, and in particular to an underwater coaxial dual-light source transmitting device and a double-end high-speed optical communication method. Background Art

[0002] In recent years, with the development of technology, space optical communication technology has become an irreplaceable wireless communication technology, especially in the field of underwater optical communication, and has received more and more attention.

[0003] Since there are fewer communication light bands available in special scenarios such as underwater, the communication light source used in space optical communication is often a light source of the same band, so that it can be used as both a beacon light and a communication light. However, in actual applications, the communication light needs to be modulated at high speed, which will cause its transmission power to decrease. Therefore, in order to ensure the signal-to-noise ratio, it is necessary to compress the divergence angle to reduce space loss.

[0004] However, in order to ensure the capture and alignment efficiency, beacon light often requires a larger divergence angle, which makes it impossible to simultaneously take into account large-scale capture and high-speed information transmission, which in turn seriously affects the application effect of space optical communication systems in special scenarios such as underwater. Summary of the invention

[0005] The present invention provides an underwater coaxial dual-light source transmitting device and a double-end high-speed optical communication method, which are used to solve the problem that large-scale capture of beacon light and high-speed information transmission of communication light cannot be taken into account in special application scenarios such as underwater.

[0006] In one aspect, the present invention provides an underwater coaxial dual-light source transmitting device, the transmitting device comprising: A signal source, used for performing signal modulation on the first light source unit; A light source module, comprising a first light source unit as a communication light source and a second light source unit as a beacon light source, wherein the optical axes of the first light source unit and the second light source unit are parallel; a light source center point of the first light source unit coincides with a light source center point of the second light source unit, and the second light source unit comprises a plurality of second light sources, and the plurality of second light sources are centrally symmetrically arranged around the light source center point of the first light source unit; A control switch, used to control the switching of the first light source unit and the second light source unit; The optical antenna is used for combining a first light source unit and a second light source unit with parallel optical axes and emitting them in the same direction.

[0007] Furthermore, the first light source has a first power and a first emission angle, which are used for high-speed signal transmission and tracking; the second light source has a second power and a second emission angle, which are used for light spot coverage and illumination; wherein the first power is less than the second power, and the difference is at least one order of magnitude; the first emission angle is less than the second emission angle, and the difference is at least ten times.

[0008] Further, the first light source unit includes one or more first light sources; When there is only one first light source, the center point of the first light source coincides with the center point of the light source module; When there are multiple first light sources, the multiple first light sources are centrally symmetrically arranged around the center point of the light source module.

[0009] Furthermore, the first light source is an LD light source, and the second light source is an LED light source.

[0010] Furthermore, the beacon light source adopts a multi-ring light source distribution, with the communication light source as the center and multiple layers of centrally symmetrical ring arrays composed of second light sources arranged.

[0011] Furthermore, the control switch includes two sub-switches, one sub-switch is connected to the first light source unit, and the other sub-switch is connected to the second light source unit.

[0012] Furthermore, the control switch controls the switching of the first light source and the second light source, including: in the scanning and capturing phase, turning on the second light source; and entering the tracking and communication phase after completing the scanning and capturing phase, turning on the first light source and turning off the second light source.

[0013] Furthermore, the control switch includes but is not limited to a circuit switch, a linear polarizer, and a mechanical switch.

[0014] On the other hand, the present invention provides an underwater dual-end high-speed optical communication method, which utilizes any of the above-mentioned transmitting devices to perform spatial optical communication.

[0015] Furthermore, the method comprises: Simultaneously turning on the second light source units of the first emitting device and the second emitting device to obtain a first beacon light spot signal and a second beacon light spot signal; Rotate the first transmitting device and the second transmitting device to scan and align with each other so that the optical axes of the first beacon light spot signal and the second beacon light spot signal overlap with each other; Simultaneously turn on the first light source units of the first transmitting device and the second transmitting device to obtain the first communication light spot signal and the second communication light spot signal, and ensure that the first communication light spot signal emitted by the first transmitting device covers the receiving end of the second transmitting device; At the same time, the second light source units of the first transmitting device and the second transmitting device are turned off, and real-time tracking is performed according to the first communication light spot signal and the second communication light spot signal to keep the link stable; The first light source unit is signal debugged to generate high-speed signal light to achieve underwater double-end high-speed optical communication.

[0016] In general, the present invention provides an underwater coaxial dual-light source transmitting device and a dual-end high-speed optical communication method. The technical solution conceived by the present invention can achieve the following beneficial effects compared with the prior art: The present invention uses a first light source unit with a high speed and a small divergence angle and a second light source unit with a high power and a large divergence angle to set the light source module as a coaxial dual light source, and through a centrally symmetrical spatial layout, an emission light spot with the same geometric center is formed, so that the first light source unit and the second light source unit can use different divergence angles and emission powers to transmit in the same direction; it can take into account both large-scale capture and high-speed information transmission at the same time, and realize the integration of beacon light and communication light underwater, which is of great significance in space optical communication systems in special scenarios such as underwater.

[0017] In addition, a control switch is used to switch the light source at different stages of underwater optical communication, and to time-multiplex the capture beacon light and the high-speed communication light. Not only can the high-speed communication capability of the first light source unit with a high speed and a small divergence angle be fully utilized to achieve precise tracking and high-speed communication, but also the high-power and large-divergence-angle second light source unit can be fully utilized to cover a large spatial range and achieve rapid scanning and capture, thereby taking into account both large-range capture and high-speed information transmission at the same time, reducing the difficulty of realizing the underwater blue-green light space optical communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the device principle of an underwater coaxial dual-light source transmitting device provided by the present invention; Figure 2 The schematic diagram of the light source module of the underwater coaxial dual light source transmitting device provided by the present invention is Figure 1 ; Figure 3 The schematic diagram of the light source module of the underwater coaxial dual light source transmitting device provided by the present invention is Figure 2 ; Figure 4It is a schematic diagram of light source spatial transmission of an underwater double-end high-speed optical communication method provided by the present invention; Figure 5 The present invention is a schematic diagram of the working principle of an underwater dual-end high-speed optical communication method. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings and embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0021] It should be noted that, in the description of the embodiments of the present invention, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a method, step or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such method, step or device. In the absence of further restrictions, the elements defined by the sentence "include a ..." do not exclude the existence of other identical elements in the method, step or device including the elements.

[0022] In order to solve the problem that the large-scale capture of beacon light and the high-speed information transmission of communication light cannot be taken into account in special application scenarios such as underwater, the present invention provides an underwater blue-green light emitting device that can effectively take into account large-scale capture and high-speed information transmission. Figure 1 As shown, the transmitting device includes a signal source, a light source module, a control switch and an optical antenna which are sequentially arranged along the light path direction.

[0023] The signal source is used to perform signal modulation on the first light source unit to generate high-speed signal light.

[0024] The light source module comprises a first light source unit as a communication light source and a second light source unit as a beacon light source, and the optical axes of the first light source unit and the second light source unit are parallel.

[0025] The light source centers of the first light source unit and the second light source unit are coaxial, that is, the light source center point of the first light source unit coincides with the light source center point of the second light source unit, and the second light source unit includes a plurality of second light sources, which are centrally symmetrically arranged around the light source center point of the first light source unit.

[0026] That is, the coaxial light source of the communication light and the beacon light is formed by following the distribution principle that the center is the communication light source and the periphery is the beacon light source. The second light source unit is a light source array, including a plurality of second light sources, which are uniformly surrounded by the periphery of the first light source unit and are centrally symmetrically arranged to form a ring light source array.

[0027] Preferably, the center point of the light source of the first light source unit is set at the center of the light source module, and the multiple second light sources are also arranged in a centrally symmetrical manner around the center point of the light source module, that is, the three center points of the light source center point of the first light source unit, the light source center point of the second light source unit and the center of the light source module coincide.

[0028] As an embodiment, the first light source unit includes one or more first light sources.

[0029] When there is one first light source, the light source center point of the first light source coincides with the light source center point of the second light source unit; when there are multiple first light sources, the light source center point of the first light source unit composed of multiple first light sources coincides with the light source center point of the second light source unit.

[0030] Furthermore, when the light source center point of the first light source unit is set at the center of the light source module, when there is one first light source, the light source center point of the first light source coincides with the center point of the light source module; when there are multiple first light sources, the multiple first light sources are arranged in a centrally symmetrical manner around the center point of the light source module.

[0031] It should be noted that the first light source unit with high bandwidth and small divergence angle is used as the communication light source; and the second light source unit with high power and large divergence angle is used as the beacon light source.

[0032] The first light source is used for high-speed signal transmission and tracking. It has the characteristics of high bandwidth and small divergence angle. It can transmit high-speed signals without easy divergence. It is used for precise tracking and high-speed communication. Among them, high-speed signals refer to digital signals with relatively high transmission rates, specifically signals with transmission rates greater than Mbps. The second light source is used for spot coverage and illumination. It has the characteristics of high power and large divergence angle. It can cover a large range of spots and reduce the spot scanning time. It can also be used as an illumination light source.

[0033] As an embodiment, the first light source has a high modulation bandwidth, a first power and a first emission angle; the second light source has a second power and a second emission angle; the high modulation bandwidth refers to a bandwidth that enables the modulator to work normally in a high frequency range. More specifically, the first power is less than the second power, and the difference is at least one order of magnitude; the first emission angle is less than the second emission angle, and the difference is at least ten times.

[0034] That is to say, the power of the second light source is several orders of magnitude greater than that of the first light source. At the same time, the divergence angle of the second light source is also more than ten times greater than that of the first light source. In terms of bandwidth, the second light source can be powered by DC and does not require a very good bandwidth, even below khz, while the first light source needs to have a high modulation bandwidth of 10M or even Gbps.

[0035] For example, in order to ensure a stable modulation rate of 10M or even above Gbps, the power of the first light source is approximately 100~1000mW, and the small divergence angle is less than mrad; the maximum power of a single second light source is 1~10W, and the large divergence angle is more than 5 degrees; and the power of the second light source unit array including multiple second light sources can reach 10~900W.

[0036] Furthermore, the wavelengths of the first light source and the second light source are preferably the same.

[0037] As a preferred embodiment, the first light source may be an LD light source, and the second light source may be an LED light source.

[0038] like Figure 2 FIG. 1 is a schematic diagram of a light source module of an underwater coaxial dual light source transmitting device provided by the present invention. Figure 1 , there is one LD light source with high bandwidth and small divergence angle, which is located at the geometric center of the light source module, that is, the center point of the LD light source coincides with the center point of the light source module; there are multiple LED light sources with high power and large divergence angle, which surround the outside of the LD light source and are evenly placed in a centrally symmetrical distribution with the LD light source as the center. Using the LD light source with high bandwidth and small divergence angle as the communication light source, the emitted light power can be compensated by compressing the divergence angle to ensure the high modulation rate of the communication light; using the LED light source with high power and large divergence angle as the beacon light source, a wide range of light spot coverage can be achieved without considering the bandwidth limitation of high power output.

[0039] like Figure 3 FIG. 1 is a schematic diagram of a light source module of an underwater coaxial dual light source transmitting device provided by the present invention. Figure 2 , also following the distribution principle of the communication light source in the center and the beacon light source in the periphery, the coaxial light source of the communication light and the beacon light is formed. There are multiple LD light sources with high bandwidth and small divergence angle, and the LD light source is arranged in the geometric center of the transmitting device in an all-in-one manner, that is, the multiple LD light sources are arranged in a centrally symmetrical manner around the center point of the light source module. A central communication light source composed of multiple LD light sources can increase the overall emission light power of the communication light; at the same time, multiple LED light sources serving as beacon light sources surround the outside of the LD light source, and are evenly placed in a centrally symmetrical distribution with the LD light source as the center.

[0040] Furthermore, the beacon light source adopts a multi-ring light source distribution, with the communication light source as the center, and multiple layers of the second light source are arranged in a central symmetrical ring array. That is, with the communication light source as the center, more layers of LED light sources are arranged in sequence to the periphery, and each layer of LED light sources is a central symmetrical ring array, thereby increasing the overall emission light power of the captured beacon light.

[0041] Preferably, the number of second light sources in each layer is equal. Figure 3 , eight LED light sources are arranged on the first layer, and eight LED light sources are also arranged on the second layer.

[0042] The control switch is used to control the switching of the first light source unit and the second light source unit.

[0043] As an embodiment, the control switch includes two sub-switches, one sub-switch is connected to the first light source unit, and the other sub-switch is connected to the second light source unit.

[0044] Specifically, one sub-switch is connected to multiple first light sources at the same time to control the switching of multiple LD light sources at the same time; another sub-switch is connected to multiple second light sources at the same time to control the switching of multiple LED light sources at the same time; thereby realizing the control switch to simultaneously switch all LD light sources and all LED light sources on and off.

[0045] The control switch is used to control the switch of the first light source and the second light source, including: in the scanning and capturing stage, the second light source is turned on; after the scanning and capturing stage is completed, the tracking and communication stage is entered, the first light source is turned on and the second light source is turned off, and the first light source is used for tracking and information transmission. That is, the LED light source is used in the scanning and capturing stage, and the LD light source is used in the tracking and communication stage.

[0046] It should be noted that the control switch can time-multiplex the capture beacon light and the high-speed communication light. For example, in the scanning capture phase, the LED light source is controlled to turn on and establish a link. After the scanning capture phase is completed, the tracking communication phase is entered, and the LD light source is turned on and the LED light source is turned off. The LD light source is used for tracking and high-speed information transmission, thereby meeting the communication requirements of using the same wavelength light source underwater while taking into account large-scale capture and high-speed information transmission.

[0047] It can be to control the light path of the light source or to control the power supply of the light source, which is not limited here. The control switch includes but is not limited to a circuit switch, a linear polarizer, and a mechanical switch.

[0048] The control switch is preferably a circuit switch, which directly controls the power on and off of the first light source unit and the second light source unit. The control switch can also be a linear polarizer, which controls the switching of the first light source unit and the second light source unit by converting the polarization state of the output light of the first light source unit and the second light source unit into two mutually orthogonal linear polarization states.

[0049] The optical antenna is used for combining a first light source unit and a second light source unit with parallel optical axes and emitting them in the same direction.

[0050] It should be noted that the optical antenna has unidirectional transmittance and can emit the communication light and the beacon light in the same direction. Since the optical axes of the first light source unit and the second light source unit are parallel, they are emitted in the same direction after being combined by the optical antenna, so that an emission spot with high-speed communication light in the center and beacon light captured in the periphery can be formed in space.

[0051] It should be noted that if Figure 4 As shown, since the beacon light emitted by the second light source unit symmetrically distributed around the first light source unit overlaps in space, its overall spot center coincides with the spot center of the communication light of the first light source unit, so it can be ensured that after the beacon light completes the capture alignment, the communication light can accurately enter the communication receiving window of the receiving end. Although there will be a strong beacon light intensity at the center of the spot of the beacon light, the second light source unit is controlled by the control switch, and the second light source unit is turned off after the scanning capture stage is completed, so that the captured beacon light generated by the second light source unit can be isolated and filtered out at the receiving end by time multiplexing, ensuring that the optical signal entering the communication receiving window of the receiving end during the tracking communication stage is only the high-speed communication light generated by the first light source unit, so that the transmitting device can take into account both the large-scale capture of the beacon light and the high-speed information transmission of the communication light.

[0052] On the other hand, the present invention also provides an underwater dual-end high-speed optical communication method, which utilizes a transmitting device to perform spatial optical communication.

[0053] As an embodiment, the second light source units of the first emitting device and the second emitting device are turned on simultaneously to obtain the first beacon light spot signal and the second beacon light spot signal; Rotate the first transmitting device and the second transmitting device to scan and align with each other so that the optical axes of the first beacon light spot signal and the second beacon light spot signal overlap with each other; Simultaneously turn on the first light source units of the first transmitting device and the second transmitting device to obtain the first communication light spot signal and the second communication light spot signal, and ensure that the first communication light spot signal emitted by the first transmitting device covers the receiving end of the second transmitting device; At the same time, the second light source units of the first transmitting device and the second transmitting device are turned off, and real-time tracking is performed according to the first communication light spot signal and the second communication light spot signal to keep the link stable; The first light source unit is signal debugged to generate high-speed signal light to realize underwater double-end high-speed optical communication.

[0054] For example, Figure 5 As shown, as a specific embodiment: when the underwater optical communication system is ready to establish a link, both ends turn on the LED light source array through the control switch to form a blue-green light spot with a large divergence angle and high power; the two ends start to scan each other, and when the capture detection units at the A / B ends respectively receive the LED emission light spot signals of the other party, they rotate to complete the mutual alignment; after completing the preliminary capture alignment, that is, when the optical axes at both ends of A / B basically coincide, the LD light source is turned on to ensure that the LD emission light spot can well cover the other party's receiving end; at this time, the LED light source with a large divergence angle is turned off, and the LD light source with a small divergence angle is retained, and accurate tracking is performed based on the emission light spot of the LD light source to keep the link stable; finally, the signal source performs high-speed signal debugging on the LD light source to generate high-speed signal light, and then the underwater two-end high-speed optical communication is started.

[0055] The underwater two-end high-speed optical communication method proposed in the present invention is based on capture alignment at a large divergence angle and tracking communication at a small divergence angle, which can be performed separately in time without affecting each other, thereby achieving the purpose of simultaneously taking into account large-scale rapid capture and high-speed information transmission.

[0056] In summary, the present invention provides an underwater coaxial dual-light source transmitting device and a dual-end high-speed optical communication method, which can solve the problem of the inability to take into account both the large-scale capture of beacon light and the high-speed information transmission of communication light in special application scenarios such as underwater.

[0057] It should be noted that, for the above-mentioned various embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0058] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0059] In the several embodiments provided in this application, it should be understood that the disclosed method or system can be implemented in other ways. For example, the above-described embodiments are only schematic, and the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0060] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0061] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0062] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the whole or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application.

[0063] Those skilled in the art will appreciate that all or part of the various circuits in the above embodiments may be completed by entering a program to instruct related hardware, and the program may be stored in a computer-readable memory, which may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0064] The above is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure cannot be limited thereto. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of the implementation scheme of the present disclosure. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure. The description and examples are regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.

[0065] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An underwater coaxial dual light source transmitting device, characterized in that: The transmitting device comprises: A signal source, used for performing signal modulation on the first light source unit; A light source module, comprising a first light source unit as a communication light source and a second light source unit as a beacon light source, wherein the optical axes of the first light source unit and the second light source unit are parallel; a light source center point of the first light source unit coincides with a light source center point of the second light source unit, and the second light source unit comprises a plurality of second light sources, and the plurality of second light sources are centrally symmetrically arranged around the light source center point of the first light source unit; A control switch, used to control the switching of the first light source unit and the second light source unit; The optical antenna is used for combining a first light source unit and a second light source unit with parallel optical axes and emitting them in the same direction.

2. The underwater coaxial dual light source transmitting device according to claim 1, characterized in that: The first light source has a first power and a first emission angle, and is used for high-speed signal transmission and tracking; the second light source has a second power and a second emission angle, and is used for light spot coverage and illumination; wherein the first power is less than the second power, and the difference is at least one order of magnitude; the first emission angle is less than the second emission angle, and the difference is at least ten times.

3. The underwater coaxial dual light source transmitting device according to claim 1, characterized in that: The first light source unit includes one or more first light sources; When there is only one first light source, the center point of the first light source coincides with the center point of the light source module; When there are multiple first light sources, the multiple first light sources are centrally symmetrically arranged around the center point of the light source module.

4. The underwater coaxial dual light source transmitting device according to claim 3, characterized in that: The first light source is an LD light source, and the second light source is an LED light source.

5. The underwater coaxial dual light source transmitting device according to claim 1, characterized in that: The beacon light source adopts a multi-ring light source distribution, with the communication light source as the center, and multiple layers of central symmetrical ring arrays composed of second light sources are arranged.

6. The underwater coaxial dual light source transmitting device according to claim 1, characterized in that: The control switch includes two sub-switches, one sub-switch is correspondingly connected to the first light source unit, and the other sub-switch is correspondingly connected to the second light source unit.

7. The underwater coaxial dual light source transmitting device according to claim 1, characterized in that: The control switch controls the switching of the first light source and the second light source, including: turning on the second light source in the scanning and capturing phase; and entering the tracking and communication phase after completing the scanning and capturing phase, turning on the first light source and turning off the second light source.

8. The underwater coaxial dual light source transmitting device according to claim 1, characterized in that: The control switch includes but is not limited to a linear polarizer, a circuit switch, and a mechanical switch.

9. An underwater dual-end high-speed optical communication method, characterized in that: Spatial optical communication is performed using the transmitting device as described in any one of claims 1 to 8.

10. The underwater dual-end high-speed optical communication method according to claim 9, characterized in that: The method comprises: Simultaneously turning on the second light source units of the first emitting device and the second emitting device to obtain a first beacon light spot signal and a second beacon light spot signal; Rotate the first transmitting device and the second transmitting device to scan and align with each other so that the optical axes of the first beacon light spot signal and the second beacon light spot signal overlap with each other; Simultaneously turn on the first light source units of the first transmitting device and the second transmitting device to obtain the first communication light spot signal and the second communication light spot signal, and ensure that the first communication light spot signal emitted by the first transmitting device covers the receiving end of the second transmitting device; At the same time, the second light source units of the first transmitting device and the second transmitting device are turned off, and real-time tracking is performed according to the first communication light spot signal and the second communication light spot signal to keep the link stable; The first light source unit is signal debugged to generate high-speed signal light to achieve underwater double-end high-speed optical communication.

Images