Optical communication module and electronic device

Abstract

The invention discloses an optical communication module and electronic equipment, the module comprises a sending unit, the sending unit comprises a data generation module, a modulation module, a driving module and a vertical cavity surface emitting laser module, and the data generation module is used for generating communication data; the output end of the data generation module is connected with the input end of the modulation module for modulating to-be-sent data to generate modulation data, the output end of the modulation module is connected with the input end of the driving module, and the output end of the driving module is connected with the vertical cavity surface emitting laser module for converting the modulation data into an optical signal for emission; the receiving unit comprises an optical signal receiving module and a demodulation module, the optical signal receiving module is used for receiving the optical signals, and the output end of the optical signal receiving module is connected with the input end of the demodulation module so as to demodulate the optical signals into communication data. According to the invention, direct communication between devices can be realized, a third-party device is not needed, the cost is low, the transmission rate is high, and the anti-interference performance is strong.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical communication, in particular to an optical communication module and an electronic device. BACKGROUND

[0002] At present, the data communication between devices mainly has two ways, indirect and direct transmission. The indirect transmission needs to pass through a third-party wireless device, such as Wi-Fi or a base station, to realize indirect transmission. The direct transmission is mainly realized by Bluetooth. The former needs to use a third-party device to provide wireless signal access, which is high in cost. The latter is low in transmission rate and poor in anti-interference. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides an optical communication module and an electronic device, which can realize direct communication between devices without the need for a third-party device, and is low in cost and high in transmission rate and strong in anti-interference.

[0004] According to the optical communication module of the first aspect of the present application, it comprises:

[0005] The sending unit comprises a data generation module, a modulation module, a driving module and a vertical cavity surface emitting laser module. The data generation module is used to generate communication data. The output end of the data generation module is connected to the input end of the modulation module for modulating the data to be sent to generate modulation data. The output end of the modulation module is connected to the input end of the driving module. The output end of the driving module is connected to the vertical cavity surface emitting laser module for converting the modulation data into optical signals.

[0006] The receiving unit comprises an optical signal receiving module and a demodulation module. The optical signal receiving module is used to receive the optical signals. The output end of the optical signal receiving module is connected to the input end of the demodulation module for demodulating the optical signals into communication data.

[0007] According to some embodiments of the present application, the vertical cavity surface emitting laser module comprises:

[0008] The upper layer PCB board is provided with a vertical cavity surface emitting laser array.

[0009] The lower layer PCB board is provided with a silicon optical chip. The upper layer PCB board and the lower layer PCB board are stacked. The vertical cavity surface emitting laser array is connected to the silicon optical chip through a mode spot converter.

[0010] According to some embodiments of the present application, the sending unit further comprises a temperature sensor for sensing the temperature of the VCLM, the temperature sensor being connected to the signal input of the driving module for reducing the working current when the temperature of the VCLM exceeds a limit.

[0011] According to some embodiments of the present application, the modulation module is a multi-carrier modulation module.

[0012] According to some embodiments of the present application, the sending unit further comprises a focusing lens arranged at the light signal output of the VCLM.

[0013] According to some embodiments of the present application, the sending unit further comprises an ambient light sensor connected to the data generation module.

[0014] According to some embodiments of the present application, the receiving unit further comprises a data storage module connected to the output of the demodulation module.

[0015] According to some embodiments of the present application, the receiving unit further comprises a data display module connected to the output of the data storage module.

[0016] According to some embodiments of the present application, the receiving unit further comprises a converging lens arranged at the light signal input of the light signal receiving module.

[0017] According to the electronic device of the second aspect of the present application, the electronic device is installed with the optical communication module of the first aspect of the present application.

[0018] The optical communication module and the electronic device according to the embodiments of the present application have at least the following beneficial effects:

[0019] In the present embodiment, the sending unit generates communication data through the data generation module, the communication data is input to the modulation module for modulation, the modulated communication data is input to the driving module, and the VCLM is driven by the driving module to convert the communication data into light signals; the receiving unit receives light signals through the light signal receiving module, and then demodulates the light signals into communication data through the demodulation module. The present application can realize direct communication between devices without the need for a third-party device, has low cost, high transmission rate and strong anti-interference performance.

[0020] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0021] The application will be further described below in conjunction with the accompanying drawings and embodiments, in which:

[0022] Figure 1 A schematic diagram of the optical communication module in the embodiment of the application is shown in FIG. 1.

[0023] Figure 2 A schematic diagram of the optical communication module in the embodiment of the application is shown in FIG. 1.

[0024] Figure 3 A schematic diagram of the optical communication module in the embodiment of the application is shown in FIG. 1.

[0025] Reference signs:

[0026] The sending unit 100, the data generation module 110, the modulation module 120, the driving module 130, the vertical cavity surface emitting laser module 140, the receiving unit 200, the optical signal receiving module 210, the demodulation module 220, the data storage module 230, the data display module 240, the first electronic device 310, the second electronic device 320, and the third electronic device 330. DETAILED DESCRIPTION

[0027] The embodiments of the application are described in detail below, examples of which are shown in the accompanying drawings, in which the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary only, and are used only for explaining the application, and cannot be understood as a limitation of the application.

[0028] In the description of the application, it should be understood that the orientation description, such as the up, down, etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0029] In the description of the application, multiple refers to two or more. If there is a description of the first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0030] In the description of the application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the application in combination with the specific content of the technical solution.

[0031] Reference Figure 1As shown, an optical communication module comprises a sending unit 100, the sending unit 100 comprises a data generation module 110, a modulation module 120, a driving module 130 and a vertical cavity surface emitting laser module 140, the data generation module 110 is used for generating communication data, the output end of the data generation module 110 is connected to the input end of the modulation module 120 for modulating the data to be sent to generate modulated data, the output end of the modulation module 120 is connected to the input end of the driving module 130, and the output end of the driving module 130 is connected to the vertical cavity surface emitting laser module 140 for converting the modulated data into optical signals;

[0032] A receiving unit 200, the receiving unit 200 comprises an optical signal receiving module 210 and a demodulation module 220, the optical signal receiving module 210 is used for receiving optical signals, and the output end of the optical signal receiving module 210 is connected to the input end of the demodulation module 220 for demodulating the optical signals into communication data.

[0033] In this embodiment, the sending unit 100 generates communication data through the data generation module 110, the communication data is input to the modulation module 120 for modulation, the modulated communication data is input to the driving module 130, and the vertical cavity surface emitting laser module 140 is driven by the driving module 130 to convert the communication data into optical signals; the receiving unit 200 receives optical signals through the optical signal receiving module 210, and then demodulates the optical signals into communication data through the demodulation module 220. The present application can realize direct communication between devices without the need for third-party equipment, and has low cost, high transmission rate and strong anti-interference performance.

[0034] It should be noted that the optical communication module of the present application can be installed on any device to enable the device to realize optical communication function. The optical communication module can be integrated in the device or can realize temporary optical communication function in a pluggable mode.

[0035] The above-mentioned data generation module 110 refers to a module for generating communication data according to the requirements of the device, and the data generation module 110 can be an MCU or other processor, which generates corresponding communication data such as user files, video streams and the like according to the instructions of the device.

[0036] The function of the above-mentioned modulation module 120 is to modulate the communication data correspondingly, and the modulation mode can select NRZ, PAM4 or OFDM modulation format. The modulated data stream is input to the driving module 130, and then the signal light is emitted by the vertical cavity surface emitting laser module 140.

[0037] It should be noted that the vertical cavity surface emitting laser (VCSEL) module 140 is an important semiconductor laser, which is different from the traditional edge emitting laser (EEL), the VCSEL is a laser emitting device from the surface of the device, that is, the vertical cavity surface emitting laser module 140 is the light source device of the application for emitting laser, and the VCSEL has low cost and high transmission efficiency.

[0038] The receiving unit 200 is the receiving end of the optical signal, and the optical signal is irradiated on the photosensitive area of the optical signal receiving module 210 and received by the optical signal receiving module 210. In this embodiment, the optical signal receiving module 210 adopts a photodiode, which can be a PIN, an APD or an array structure thereof. The optical signal receiving module 210 converts the optical signal into an electrical signal, which is then transmitted to the modulation module 120. The modulation module 120 selects a corresponding demodulation mode according to the modulation mode adopted by the sending unit 100.

[0039] In some embodiments, the vertical cavity surface emitting laser module 140 comprises:

[0040] The upper layer PCB board is provided with a vertical cavity surface emitting laser array;

[0041] The lower layer PCB board is provided with a silicon optical chip, and the upper layer PCB board and the lower layer PCB board are stacked, and the vertical cavity surface emitting laser array is connected to the silicon optical chip through a spot converter.

[0042] In this embodiment, the vertical cavity surface emitting laser module 140 adopts a stacked structure of the upper layer PCB board and the lower layer PCB board, and the vertical cavity surface emitting laser array is connected to the silicon optical chip through a spot converter, which can improve signal integrity, reduce coupling loss, and has high integration and good heat dissipation.

[0043] Specifically, the structure of the stacked upper layer PCB board and lower layer PCB board is adopted, the VCSEL array is arranged on the upper layer, the silicon optical chip is arranged on the lower layer, and the optoelectronic components are arranged in layers, which can reduce the overall volume and be suitable for mobile phone / smart home device applications; and the VCSEL array is arranged on the upper layer PCB board, away from the heat-sensitive area of the silicon optical chip on the lower layer PCB board, and has good heat dissipation. The function of the spot converter is to convert the circular spot of the VCSEL array into a rectangular waveguide mode of the silicon optical chip, that is, the VCSEL array is connected to the polymer optical waveguide through the spot converter, which can reduce coupling loss and improve signal integrity.

[0044] In some embodiments, the sending unit 100 further comprises a temperature sensor for sensing the temperature of the vertical cavity surface emitting laser module 140, the temperature sensor being connected to the signal input end of the driving module 130 for reducing the working current when the temperature of the vertical cavity surface emitting laser module 140 exceeds the limit.

[0045] In the present embodiment, the temperature sensor is arranged on the vertical cavity surface emitting laser module 140, and the temperature sensor is connected to the signal input end of the driving module 130, so that the driving module 130 reduces the working current when the temperature exceeds the limit, thereby avoiding overheating and improving the safety and operation stability of the module.

[0046] It should be understood that the driving module 130 selects a driving chip with a thermal shutdown protection function, and the driving chip obtains the temperature of the VCSEL array through the voltage feedback by the temperature sensor, and reduces the current flowing through the VCSEL array when the temperature of the VCSEL array exceeds the specified temperature.

[0047] In some embodiments, the modulation module 120 is a multicarrier modulation module.

[0048] In the present embodiment, the modulation module 120 adopts a multicarrier modulation module, and one-to-many communication transmission can be realized.

[0049] Reference Figure 2 As described above, different users exist within the coverage range of one device light source, that is, the light emitted by the sending unit 100 can be received by multiple devices, and the communication between the devices can be carried out between multiple users within the coverage range of the light. For example, in a certain application scenario, the receiving device 1 is a high-definition video player, the receiving device 2 is a computer device, and the receiving device 3 is a mobile terminal. The high-definition video player requires higher rate and bandwidth, the computer device requires less rate and bandwidth, and the mobile terminal consumes the least data flow. Since different devices / users have different rate and bandwidth requirements, the multicarrier modulation mode can better adapt to the rate and bandwidth requirements of different devices when the sending unit 100 communicates with multiple devices. The multicarrier modulation module can be an orthogonal frequency division multiplexing modulation or a discrete multi-tone modulation.

[0050] In some embodiments, the sending unit 100 further comprises a focusing lens arranged at the light signal output end of the vertical cavity surface emitting laser module 140.

[0051] In the present embodiment, the focusing lens is arranged at the light signal output end of the vertical cavity surface emitting laser module 140, so that the sending unit 100 has the focusing function, and the beam quality can be optimized and the coupling efficiency of the optical path can be improved.

[0052] In some embodiments, the sending unit further comprises an ambient light sensor, which is connected to the data generating module 110.

[0053] In the present embodiment, the ambient light sensor detects the ambient light intensity, and the data generating module 110 can generate the link quality data according to the ambient light intensity and send it, so that the receiving device can know the current communication quality.

[0054] In some embodiments, the receiving unit 200 further comprises a data storage module 230, which is connected to the output end of the demodulation module 220.

[0055] In the present embodiment, the data storage module 230 is arranged in the receiving unit 200, and the demodulated data can be stored in the device and used after being processed by the device.

[0056] In some embodiments, the receiving unit 200 further comprises a data display module 240, which is connected to the output end of the data storage module 230.

[0057] In the present embodiment, the data display module 240 is arranged in the receiving unit 200, and the demodulated data can be displayed on the screen of the device.

[0058] In some embodiments, the receiving unit 200 further comprises a converging lens, which is arranged at the light signal input end of the light signal receiving module 210.

[0059] In the present embodiment, the converging lens is arranged at the light signal input end of the light signal receiving module 210, so that the light signal can be converged on the sensitive area of the light signal receiving module 210 after passing through the converging lens, which can optimize the beam quality and improve the coupling efficiency of the optical path.

[0060] The present application also relates to an electronic device, which is installed with the optical communication module of the above embodiments.

[0061] For example, as shown in FIG. 3, Figure 3 For example, as shown in FIG. 3,

[0062] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. An optical communication module, characterized in that, include: The transmitting unit (100) includes a data generation module (110), a modulation module (120), a driving module (130), and a vertical cavity surface-emitting laser module (140). The data generation module (110) is used to generate communication data. The output of the data generation module (110) is connected to the input of the modulation module (120) to modulate the data to be transmitted to generate modulated data. The output of the modulation module (120) is connected to the input of the driving module (130). The output of the driving module (130) is connected to the vertical cavity surface-emitting laser module (140) to convert the modulated data into an optical signal for transmission. The receiving unit (200) includes an optical signal receiving module (210) and a demodulation module (220). The optical signal receiving module (210) is used to receive the optical signal. The output terminal of the optical signal receiving module (210) is connected to the input terminal of the demodulation module (220) to demodulate the optical signal into communication data.

2. The optical communication module according to claim 1, characterized in that, The vertical cavity surface-emitting laser module (140) includes: Upper PCB board, on which a vertical cavity surface-emitting laser array is mounted; The lower PCB board has a silicon photonic chip mounted on it. The upper PCB board is stacked with the lower PCB board. The vertical cavity surface-emitting laser array is connected to the silicon photonic chip through a mode converter.

3. The optical communication module according to claim 1, characterized in that, The transmitting unit (100) also includes a temperature sensor for sensing the temperature of the vertical cavity surface-emitting laser module (140). The temperature sensor is connected to the signal input terminal of the driving module (130) to reduce the operating current when the temperature of the vertical cavity surface-emitting laser module (140) exceeds the limit.

4. The optical communication module according to claim 1, characterized in that, The modulation module (120) is a multi-carrier modulation module.

5. The optical communication module according to claim 1, characterized in that, The transmitting unit (100) also includes a focusing lens, which is disposed at the optical signal output end of the vertical cavity surface-emitting laser module (140).

6. The optical communication module according to claim 1, characterized in that, The transmitting unit (100) further includes an ambient light sensor, which is connected to the data generation module (110).

7. The optical communication module according to claim 1, characterized in that, The receiving unit (200) further includes a data storage module (230), which is connected to the output of the demodulation module (220).

8. The optical communication module according to claim 7, characterized in that, The receiving unit (200) further includes a data display module (240), which is connected to the output of the data storage module (230).

9. The optical communication module according to claim 1, characterized in that, The receiving unit (200) also includes a converging lens, which is disposed at the optical signal input end of the optical signal receiving module (210).

10. An electronic device, characterized in that, The electronic device is equipped with an optical communication module as described in any one of claims 1 to 9.

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