Short-range wireless high-speed full-duplex laser communication transceiver system

Abstract

The utility model relates to short distance wireless high speed full duplex laser communication transceiving system, including the first transceiving module and the second transceiving module of opposite setting, the first transceiving module and the second transceiving module all include laser, wavelength division multiplexing wavelength division system, beam combiner, visible light source, coaxial optical transceiver lens and main control circuit, the 1550nm wavelength optical signal of first transceiving module emission is received by the second transceiving module, and the 1310nm wavelength optical signal of second transceiving module emission is received by the first transceiving module, realizes full duplex communication. The utility model can solve the prior art electromagnetic interference serious, deployment complex, cost is high, non full duplex, low rate and so on problem.

Description

Technical Field

[0001] This utility model relates to the field of laser communication technology, specifically to a short-range wireless high-speed full-duplex laser communication transceiver system. It is suitable for achieving high-speed, full-duplex laser communication over short distances and can be widely used in data centers, AR, VR, medical, aircraft, and other applications that require high-speed wireless data transmission and are sensitive to electromagnetic fields. Background Technology

[0002] With the development of AI (Artificial Intelligence) technology, the demand for data transmission throughput bandwidth is increasing. For example, smart factories generate massive amounts of data, data centers exchange massive amounts of data, and homes also place higher demands on network bandwidth. There are also situations where wireless communication is required, but these are sensitive to electromagnetic interference, such as inside aircraft, hospital operating rooms, and wards. The common requirements of these scenarios are short-range communication (10-20 meters) + high speed (10-25Gbps) + simple deployment + full-duplex + security + anti-interference + low cost. Existing solutions include AOC (Active Optical Cable), AEC (Active Copper Cable), Wi-Fi, and Li-Fi (Visible Light Communication). Each of these solutions has its own shortcomings. For example, AOC and AEC can support high transmission rates, but require cabling, are complex to maintain, and are costly. Wi-Fi does not require cabling but has low speed and poor anti-interference capabilities. Li-Fi requires a light source to support asymmetric transmission and reception.

[0003] Wireless laser communication is also a viable solution, but traditional FSO (free space communication) is mainly used for long-distance communication, involving dynamic acquisition, alignment, and tracking systems (ATP), and is complex to deploy and costly, making it unsuitable for short-distance communication. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a short-range wireless high-speed full-duplex laser communication transceiver system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A short-range wireless high-speed full-duplex laser communication transceiver system, comprising a first transceiver module and a second transceiver module arranged opposite to each other; Both the first transceiver module and the second transceiver module include a laser, a wavelength division multiplexing wavelength division system, a beam combiner, a visible light source, a coaxial optical transceiver lens, and a main control circuit. The laser of the first transceiver module emits a 1550nm wavelength signal light, and the laser of the second transceiver module emits a 1310nm wavelength signal light. The visible light source of both the first transceiver module and the second transceiver module is used to emit visible light; The wavelength division multiplexing (WDM) system of the first transceiver module is used to separate the received 1310nm wavelength signal light and transmit it to the photodetector of the first transceiver module for conversion into an electrical signal; the wavelength division multiplexing (WDM) system of the second transceiver module is used to separate the received 1550nm wavelength signal light and transmit it to the photodetector of the second transceiver module for conversion into an electrical signal. The beam combiners of the first and second transceiver modules are both used to combine visible light and signal light to achieve coaxial output; The coaxial optical transceiver lenses of the first and second transceiver modules are both used to expand the beam of the combined light and shrink the beam of the received light. The diameter of the coaxial optical transceiver lens is ≥25mm and the scaling ratio is ≥5 times. The main control circuits of the first and second transceiver modules are both used to receive data signals from the corresponding high-speed signal sources and drive the corresponding lasers, and to amplify and shape the electrical signals converted by the corresponding photodetectors. In this system, the 1550nm wavelength optical signal emitted by the first transceiver module is received by the second transceiver module, and the 1310nm wavelength optical signal emitted by the second transceiver module is received by the first transceiver module, thereby achieving full-duplex communication.

[0006] Furthermore, the first transceiver module and the second transceiver module are respectively connected to the corresponding steering gimbal via clamps.

[0007] Furthermore, the present invention also includes a polar coordinate photosensitive plate, which is located between the first transceiver module and the second transceiver module. The polar coordinate photosensitive plate has the same center point and polar coordinate scale on both opposite surfaces, and is used to receive visible light spots to assist in the alignment between the first transceiver module and the second transceiver module.

[0008] Furthermore, the signal light emitted by the lasers of the first and second transceiver modules enters the wavelength division multiplexing (WDM) system after passing through corresponding laser shaping lenses.

[0009] Furthermore, the photodetectors of both the first and second transceiver modules are avalanche photodiodes with a receiving surface diameter of 30 micrometers.

[0010] Furthermore, the visible light sources of the first and second transceiver modules are controlled to be turned on and off by corresponding visible light switches.

[0011] Furthermore, the wavelength division multiplexing (WDM) systems of both the first and second transceiver modules are circulators or wavelength division filters.

[0012] This invention utilizes two different wavelengths (1550nm and 1310nm) of laser light for transmission and reception under wavelength division multiplexing (WDM) mode. The WDM wavelength division system is used inside the module to separate the signals and guide them to the corresponding photodetectors. The coaxial optical transceiver lens is used as a beam expander to effectively increase the divergence angle of the beam, making alignment easier. At the same time, a visible light source is integrated to achieve rapid manual alignment with a polar coordinate photosensitive plate.

[0013] The above technical solution has the following beneficial technical effects: High-speed transmission: This invention can achieve a high-speed transmission rate of 10GBps, which can meet the needs of high-speed data transmission under high-speed wireless anti-interference conditions, and is suitable for application scenarios such as big data transmission and high-definition video transmission.

[0014] Full-duplex communication: By employing technologies such as time division multiplexing or wavelength division multiplexing, full-duplex communication is achieved, improving communication efficiency and resource utilization.

[0015] High-quality beam: By using coaxial optical transceiver lenses to expand the transmitted beam and contract the received beam, beam quality is optimized and transmission distance is extended. Stable signal transmission can be guaranteed within a 10-meter transmission distance.

[0016] Low bit error rate: A high-sensitivity avalanche photodiode (APD) is used as the photodetector, and through careful circuit design and signal processing, the bit error rate is controlled to be less than 10. -12 This level of technology improves the reliability of communication.

[0017] Easy alignment: The visible light visual alignment system facilitates alignment between transceiver modules, reducing the difficulty of installation and debugging. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a schematic diagram of the alignment process of the short-range wireless high-speed full-duplex laser communication transceiver system of this utility model; Figure 2 This is a schematic diagram of the internal structure of the first transceiver module; Figure 3 This is a schematic diagram of a polar coordinate photosensitive plate; Figure 4 This is a schematic diagram of a coaxial optical transceiver lens. Detailed Implementation

[0019] like Figure 1-4 As shown, the present invention provides a short-range wireless high-speed full-duplex laser communication transceiver system, which includes a first transceiver module 1 and a second transceiver module 2 arranged opposite to each other. The first transceiver module 1 and the second transceiver module 2 have the same structure, both including a laser 1.3, a wavelength division multiplexing wavelength division system 1.5, a beam combiner 1.7, a visible light source 1.9, a coaxial optical transceiver lens 1.8, and a main control circuit 1.2.

[0020] The laser 1.3 (single-mode) of the first transceiver module 1 emits a 1550nm wavelength signal light, and the laser (single-mode) of the second transceiver module 2 emits a 1310nm wavelength signal light. The signal lights emitted by the lasers 1.3 of the first transceiver module 1 and the second transceiver module 2 are respectively passed through the corresponding laser shaping lens 1.4 and then enter the wavelength division multiplexing wavelength division system 1.5.

[0021] The visible light source 1.9 of both the first transceiver module 1 and the second transceiver module 2 is used to emit visible light; the visible light source can be a visible laser pointer (such as a red laser pointer) to project a light spot to the receiving end. The visible light source 1.9 of the first transceiver module 1 and the second transceiver module 2 is controlled to be turned on and off by the corresponding visible light switch 1.10.

[0022] The wavelength division multiplexing (WDM) wavelength division system 1.5 of the first transceiver module 1 is used to transmit 1550nm wavelength signal light to the beam combiner 1.7 of the first transceiver module 1, and simultaneously separate the received 1310nm wavelength signal light and transmit it to the photodetector 1.6 of the first transceiver module 1 for conversion into an electrical signal; the wavelength division multiplexing (WDM) wavelength division system of the second transceiver module 2 is used to transmit 1310nm wavelength signal light to the beam combiner of the second transceiver module 2, and simultaneously separate the received 1550nm wavelength signal light and transmit it to the photodetector of the second transceiver module 2 for conversion into an electrical signal; wherein, both the wavelength division multiplexing (WDM) wavelength division system 1.5 of the first transceiver module 1 and the second transceiver module 2 can be circulators or wavelength division filters.

[0023] The beam combiner 1.7 of the first transceiver module 1 and the second transceiver module 2 are both used to combine visible light and signal light to achieve coaxial output.

[0024] The coaxial optical transceiver lenses 1.8 of both the first transceiver module 1 and the second transceiver module 2 are used to expand the beam of the combined light and reduce the beam of the received light. At the transmitting end, the coaxial optical transceiver lens 1.8 acts as a beam expander, effectively expanding the transmitted beam by precisely adjusting its position and angle. At the receiving end, the coaxial optical transceiver lens 1.8 acts as a beam reducer, effectively reducing the received beam by adjusting its position and angle to the optimal state.

[0025] The main control circuit 1.2 of the first transceiver module 1 and the second transceiver module 2 are both used to receive the data signal of the corresponding high-speed signal source 1.1 and drive the corresponding laser 1.3, and amplify and shape the electrical signal converted by the corresponding photodetector 1.6.

[0026] The photodetectors 1.6 of both the first transceiver module 1 and the second transceiver module 2 are avalanche photodiodes (APDs), with a receiving surface diameter of 30 micrometers. The beam-expanding system expands the beam to a size more than twice the receiving area of ​​the APD.

[0027] In this invention, the 1550nm wavelength optical signal emitted by the first transceiver module 1 is received by the second transceiver module 2, and the 1310nm wavelength optical signal emitted by the second transceiver module 2 is received by the first transceiver module 1, thereby realizing full-duplex communication with a communication rate range of 1~25Gbps.

[0028] Furthermore, the first transceiver module 1 and the second transceiver module 2 are respectively connected to the corresponding gimbal 5 via clamps 4. The gimbal 5 is a gimbal that includes pitch and azimuth axis rotation. The gimbal 5 has a fastening device, and once the position is determined, it can be locked with a locking element, with an alignment accuracy error allowed of ±5°.

[0029] This invention employs a visible light laser visual alignment system. By integrating a visible light source 1.9 into the transmitting optical system, visible light and emitted light are coaxially output through optical elements. Users can conveniently perform alignment operations between the transceiver modules by observing the position of the visible light. Specifically, this invention also includes a polar coordinate photosensitive plate 3, located between the first transceiver module 1 and the second transceiver module 2. The polar coordinate photosensitive plate 3 has the same center point and polar coordinate scale (such as radial and angular scales) on both opposing surfaces, used to receive the visible light spot to assist in the alignment between the first transceiver module 1 and the second transceiver module 2. This polar coordinate photosensitive plate 3 is sensitive to visible light (such as visible laser light), and a clear light spot can be formed on its surface. The polar coordinate photosensitive plate 3 is temporarily fixedly installed at a predetermined position, which is expected to be the common optical path area that needs to be precisely aligned when the two transceiver modules establish a communication link in the future. For example, the polar coordinate photosensitive plate 3 can be fixed on a bracket and placed in the middle position between the two transceiver modules to be aligned.

[0030] The deployment method of this utility model includes the following steps: The polar coordinate photosensitive plate 3 is placed at a predetermined position between the first transceiver module 1 and the second transceiver module 2; The first transceiver module 1 and the second transceiver module 2 are installed on the steering gimbal 5; Turn on the visible light source 1.9 of both devices and adjust their respective gimbals 5 so that the visible light beams output coaxially by the beam combiner 1.7 of both devices are vertically aligned with the center of the polar coordinate photosensitive plate 3. Turn off visible light, lock the gimbal 5, remove the polar coordinate photosensitive plate 3, and establish a communication link.

[0031] This utility model is applicable to one of the following scenarios: short-distance interconnection of data centers; deployed between server racks or floors, with a transmission distance of ≤100 meters, replacing optical fiber to achieve high-speed connection; users can adjust the angle of the transmitter and receiver by visible laser and visual inspection, with a deployment time of ≤10 seconds; smart factories: optical connectivity and communication are achieved through direct connection or by reflectors deployed on the ceiling.

[0032] The specific embodiments of this utility model have been described above. However, those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principle and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A short-range wireless high-speed full-duplex laser communication transceiver system, characterized in that: It includes a first transceiver module and a second transceiver module that are set relative to each other; Both the first transceiver module and the second transceiver module include a laser, a wavelength division multiplexing wavelength division system, a beam combiner, a visible light source, a coaxial optical transceiver lens, and a main control circuit. The laser of the first transceiver module emits a 1550nm wavelength signal light, and the laser of the second transceiver module emits a 1310nm wavelength signal light. The visible light source of both the first transceiver module and the second transceiver module is used to emit visible light; The wavelength division multiplexing (WDM) system of the first transceiver module is used to separate the received 1310nm wavelength signal light and transmit it to the photodetector of the first transceiver module for conversion into an electrical signal; the wavelength division multiplexing (WDM) system of the second transceiver module is used to separate the received 1550nm wavelength signal light and transmit it to the photodetector of the second transceiver module for conversion into an electrical signal. The beam combiners of the first and second transceiver modules are both used to combine visible light and signal light to achieve coaxial output; The coaxial optical transceiver lenses of the first transceiver module and the second transceiver module are both used to expand the beam of the combined light and to shrink the beam of the received light. The main control circuits of the first and second transceiver modules are both used to receive data signals from the corresponding high-speed signal sources and drive the corresponding lasers, and to amplify and shape the electrical signals converted by the corresponding photodetectors. In this system, the 1550nm wavelength optical signal emitted by the first transceiver module is received by the second transceiver module, and the 1310nm wavelength optical signal emitted by the second transceiver module is received by the first transceiver module, thereby achieving full-duplex communication.

2. The short-range wireless high-speed full-duplex laser communication transceiver system according to claim 1, characterized in that: The first transceiver module and the second transceiver module are respectively connected to the corresponding steering gimbal via clamps.

3. The short-range wireless high-speed full-duplex laser communication transceiver system according to claim 1, characterized in that: It also includes a polar coordinate photosensitive plate, which is located between the first transceiver module and the second transceiver module. The polar coordinate photosensitive plate has the same center point and polar coordinate scale on both sides of the polar coordinate photosensitive plate, and is used to receive the light spot of visible light to assist in the alignment between the first transceiver module and the second transceiver module.

4. The short-range wireless high-speed full-duplex laser communication transceiver system according to claim 1, characterized in that: The signal light emitted by the lasers of the first and second transceiver modules enters the wavelength division multiplexing (WDM) system after passing through corresponding laser shaping lenses.

5. The short-range wireless high-speed full-duplex laser communication transceiver system according to claim 1, characterized in that: The photodetectors of both the first and second transceiver modules are avalanche photodiodes with a receiving surface diameter of 30 micrometers.

6. The short-range wireless high-speed full-duplex laser communication transceiver system according to claim 1, characterized in that: The visible light sources of the first and second transceiver modules are controlled to be turned on and off by corresponding visible light switches.

7. The short-range wireless high-speed full-duplex laser communication transceiver system according to claim 1, characterized in that: Both the first and second transceiver modules use wavelength division multiplexing (WDM) systems that are either circulators or WDM filters.

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