An optical energy supply and communication integrated device

Abstract

The application provides a light-powered and communication integrated device, and relates to the technical fields of optical fiber communication and optical fiber power supply, which comprises a packaging shell with a first end face and a second end face, an optical fiber interface arranged on the first end face, a power supply outlet arranged on the second end face, a communication light driving interface arranged on the second end face and used for receiving external electrical signals, a wavelength division multiplexer arranged in the packaging shell and optically coupled with the optical fiber interface at a common end, an optoelectronic conversion unit optically coupled with a first branch end of the wavelength division multiplexer at an input end and electrically connected with the power supply outlet at an output end and used for converting received power supply laser into electrical energy, and an electro-optical conversion unit electrically connected with the communication light driving interface at an input end and optically coupled with a second branch end of the wavelength division multiplexer at an output end and used for converting external electrical signals into optical communication signals. The application solves the problems of the prior art, such as the separation of functional modules, large volume and complex interface, and realizes device weight reduction and reliability improvement.

Description

Technical Field

[0001] This invention relates to the fields of optical fiber communication and optical fiber power supply technology, and specifically to an integrated device that combines optical power supply and communication. Background Technology

[0002] In applications such as aircraft fuel quantity monitoring, smart grids, industrial IoT, and oil and gas well monitoring, remote sensor devices often face challenges such as power supply difficulties, communication interference, and ignition source protection. Fiber optic technology, due to its inherent safety, resistance to electromagnetic interference, and electrical isolation, is widely used in these scenarios. Currently, the following solutions are commonly used to power and communicate with remote devices:

[0003] 1. Discrete module solution: such as the "Energy and Communication Co-transmission System", which uses independent energy optical transmission unit, communication optical transceiver unit, wavelength division multiplexing module and remote photoelectric conversion module. Each module is connected by optical fiber or cable, resulting in a large system size.

[0004] 2. Pure optical communication module solution: such as the standard SFP optical module, which only provides an optical fiber communication interface and does not have the functions of power laser reception and photoelectric conversion, and cannot power external devices.

[0005] 3. Customized photovoltaic power supply solutions: Some studies package photovoltaic cells and power management circuits separately, but do not integrate them with communication modules, requiring additional connections, which increases the size and power consumption of the equipment.

[0006] The above solutions generally suffer from problems such as low integration, large size, and incompatible interfaces, making it difficult to meet the needs of industrial sites, especially the aerospace field, for miniaturized, lightweight, and highly reliable equipment. Summary of the Invention

[0007] To address the problems of discrete functional modules, large size, and incompatible interfaces in existing technologies, this application provides an integrated optical power supply and communication device. This device integrates optical power reception, photoelectric conversion, optical communication transceiver, and wavelength division multiplexing functions into a single miniaturized package, achieving a miniaturized and integrated optical power supply and communication solution. In scenarios requiring fiber optic transmission for fuel measurement or other applications requiring optical power conversion and transmission, this facilitates lightweighting of equipment and systems and improves reliability.

[0008] This application provides the following technical solution: an integrated device for optical power supply and communication, comprising: A package housing having a first end face and a second end face; A fiber optic interface is disposed on the first end face of the encapsulation housing for connecting an external fiber optic cable; A power supply outlet is located on the second end face of the encapsulation housing for outputting electrical energy to the outside; A communication optical drive interface is disposed on the second end face of the package housing for receiving external current on / off signals for communication. A wavelength division multiplexer is disposed within the encapsulation housing, and the common terminal of the wavelength division multiplexer is optically coupled to the optical fiber interface; A photoelectric conversion unit is disposed inside the package housing. The input end of the photoelectric conversion unit is optically coupled to the first branch end of the wavelength division multiplexer, and the output end of the photoelectric conversion unit is electrically connected to the power supply outlet, for converting the received first wavelength power supply laser into electrical energy. An electro-optical conversion unit is disposed within the package housing. The input terminal of the electro-optical conversion unit is electrically connected to the communication optical drive interface, and the output terminal of the electro-optical conversion unit is optically coupled to the second branch terminal of the wavelength division multiplexer, for converting the current on / off signal into an optical communication signal of the second wavelength. The first wavelength is different from the second wavelength. The power supply laser and the optical communication signal are combined by the wavelength division multiplexer and then transmitted to the external optical fiber through the optical fiber interface.

[0009] According to one embodiment of this application, the output end of the electro-optic conversion unit is optically coupled to the second branch end of the wavelength division multiplexer through a collimating lens unit.

[0010] According to one embodiment of this application, the encapsulation housing is a TO-can metal package, a ceramic package, or a QFN plastic package, and the dimensions of the encapsulation housing satisfy: length ≤ 20mm, width ≤ 15mm, and height ≤ 15mm.

[0011] According to one embodiment of this application, the wavelength division multiplexer is optically coupled to the photoelectric conversion unit and the electro-optical conversion unit through free-space optical coupling or a microlens array.

[0012] According to one embodiment of this application, the wavelength division multiplexer is a thin-film filter-type micro wavelength division multiplexer, an arrayed waveguide grating, or a tapered wavelength division multiplexer.

[0013] According to one embodiment of this application, the bottom or side of the encapsulation housing is provided with a heat dissipation structure, and the heat dissipation structure is thermally connected to the photoelectric conversion unit.

[0014] According to one embodiment of this application, the photoelectric conversion unit includes an InGaAs photovoltaic cell or a six-junction gallium arsenide photovoltaic cell; the electro-optical conversion unit includes a laser diode or a light-emitting diode.

[0015] According to one embodiment of this application, the optical fiber interface is an FC / PC standard interface.

[0016] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least: 1. High integration and miniaturization: The embodiments of the present invention integrate power supply, communication and wavelength division multiplexing functions into a single miniaturized package, which significantly reduces the size of the device and facilitates deployment in space-constrained industrial sites.

[0017] 2. Plug and play, simplified deployment: The external interfaces are uniformly fiber optic port, power supply port and communication optical drive port, eliminating the need for users to perform complex module connections and debugging, and can be directly connected to the circuit board.

[0018] 3. Full functionality: It realizes "power transmission and communication through a single fiber", solving the dual needs of power supply and communication for remote equipment.

[0019] 4. Reduced costs: The integrated design reduces the number of fiber optic connectors and cables between discrete modules, thereby reducing system material costs and installation costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the external structure of an integrated optical power supply and communication device according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of the internal structure of an integrated optical power supply and communication device according to an embodiment of the present invention; Figure 3 This is an interface pin definition diagram of an integrated optical power supply and communication device according to an embodiment of the present invention; Among them, 1-encapsulation housing, 1-1-first end face, 1-2-second end face, 1-3-accommodating chamber, 2-fiber optic interface, 3-1-first pin of power supply outlet, 3-2-second pin of power supply outlet, 4-1-first pin of communication optical drive interface, 4-2-second pin of communication optical drive interface, 5-wavelength division multiplexer, 6-photoelectric conversion unit, 7-electro-optical conversion unit, 8-collimating lens unit. Detailed Implementation

[0022] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0023] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] like Figures 1-3 As shown, an embodiment of the present invention provides an integrated device for optical power supply and communication, comprising: A package housing 1 has a first end face 1-1 and a second end face 1-2; An optical fiber interface 2 is disposed on the first end face 1-1 of the encapsulation housing 1 for connecting an external optical fiber; A power supply outlet, including a first pin 3-1 and a second pin 3-2, is disposed on the second end face 1-2 of the package housing 1 for outputting electrical energy to the outside; A communication optical drive interface, including a first pin 4-1 and a second pin 4-2 of the communication optical drive interface, is disposed on the second end face 1-2 of the package housing 1 and is used to receive external current on / off signals for communication. A wavelength division multiplexer 5 is disposed in the receiving chamber 1-3 of the encapsulation housing 1, and the common terminal of the wavelength division multiplexer 5 is optically coupled to the optical fiber interface 2; A photoelectric conversion unit 6 is disposed in the receiving chamber 1-3 of the packaging housing 1. The input end of the photoelectric conversion unit 6 is optically coupled to the first branch end of the wavelength division multiplexer 5, and the output end of the photoelectric conversion unit 6 is electrically connected to the power supply outlet, for converting the received first wavelength power supply laser into electrical energy. An electro-optical conversion unit 7 is disposed in the receiving chamber 1-3 of the encapsulation housing 1. The input end of the electro-optical conversion unit 7 is electrically connected to the communication optical drive interface, and the output end of the electro-optical conversion unit 7 is optically coupled to the second branch end of the wavelength division multiplexer 5, for converting the current on / off signal into an optical communication signal of the second wavelength. The first wavelength is different from the second wavelength. The power supply laser and the optical communication signal are combined by the wavelength division multiplexer 5 and then transmitted to the external optical fiber through the optical fiber interface 2.

[0025] According to one embodiment of this application, the output end of the electro-optic conversion unit 7 is optically coupled to the second branch end of the wavelength division multiplexer 5 through a collimating lens unit 8.

[0026] In specific implementation, the integrated optical power supply and communication device provided by this invention mainly includes: 1. Packaging structure A miniaturized package housing 1 has a first end face 1-1 and a second end face 1-2, and forms an internal receiving chamber 1-3. The dimensions of the package housing 1 are preferably length × width × height ≤ 20mm × 15mm × 15mm, and it can be packaged using TO-can packaging (laser diode module, semiconductor laser packaging), ceramic packaging, or QFN molding process (encapsulation or molding).

[0027] 2. External Interface An optical fiber interface 2 is located on the first end face 1-1 of the encapsulation housing 1, and is used to connect to an external single-mode or multi-mode optical fiber to receive externally powered laser and send optical communication signals.

[0028] A power supply outlet is located on the second end face 1-2 of the encapsulation housing 1, for outputting converted DC power to the outside.

[0029] A communication optical drive interface is located on the second end face 1-2 of the package housing 1, and is used to receive the communication optical diode drive current output by the external conditioning circuit.

[0030] 3. Internal functional units A wavelength division multiplexer (WDM) 5 is disposed within housing chambers 1-3, and its common end is optically coupled to fiber optic interface 2. This WDM 5 is used to combine and demultiplex the power supply laser (first wavelength) and the optical communication signal (second wavelength).

[0031] The photoelectric conversion unit 6 is disposed within the receiving chambers 1-3. Its input terminal is optically coupled to the first branch terminal of the wavelength division multiplexer 5, and its output terminal is electrically connected to the power supply outlet. This unit includes an InGaAs photovoltaic cell / photodetector (PD, which can use high-conversion-efficiency photovoltaic cells such as hexajunction gallium arsenide) for converting the received power laser into DC power.

[0032] An electro-optical conversion unit 7 is disposed within housing chambers 1-3. Its input terminal is electrically connected to the communication optical drive interface, and its output terminal is optically coupled to the second branch terminal of the wavelength division multiplexer 5. This unit includes a laser diode (LD) or a light-emitting diode (LED), which can convert high-frequency on / off current signals into communication optical signals of a specific wavelength.

[0033] The collimating lens unit 8 is disposed in the receiving chamber 1-3, which collimates the divergent light emitted by the photoelectric conversion unit 6 into parallel light so as to converge it into the external transmission optical fiber.

[0034] 4. Optical path coupling method The wavelength division multiplexer 5 is coupled to the photoelectric conversion unit 6 and the electro-optical conversion unit 7 using free-space optical coupling or microlens array coupling to achieve a compact optical path layout.

[0035] In some embodiments of the present invention, the wavelength division multiplexer 5 is a thin-film filter-type micro wavelength division multiplexer, an arrayed waveguide grating, or a tapered wavelength division multiplexer.

[0036] In some embodiments of the present invention, a heat dissipation structure (not shown in the figure) is provided on the bottom or side of the packaging shell 1, and the heat dissipation structure is thermally connected to the photoelectric conversion unit 6. In specific implementation, the heat dissipation structure can be a metal heat-conducting block. Inside the packaging shell 1, between the back of the photoelectric conversion unit 6 and the inner wall of the shell, a copper or molybdenum-copper alloy heat-conducting block is provided. One side of the heat-conducting block is bonded to the substrate of the photoelectric conversion unit 6 by thermally conductive adhesive or low-temperature solder; the other side is directly pressed or welded to the inner wall of the packaging shell 1, so as to directly conduct the heat generated by the photoelectric conversion unit 6 to the shell through the heat-conducting block, and then radiate or conduct it outward from the shell to the outside.

[0037] In one specific embodiment, such as Figure 1 As shown, the integrated device in this embodiment includes a package housing 1. A first end face 1-1 is provided with an optical fiber interface 2, which is an FC / PC standard interface. A second end face 1-2 is provided with four pins, including a first pin 3-1 for power supply output, a second pin 3-2 for power supply output, a first pin 4-1 for the communication optical drive interface, and a second pin 4-2 for the communication optical drive interface.

[0038] like Figure 2 As shown, within the internal cavity of the encapsulation housing 1, the wavelength division multiplexer 5 is a thin-film filter-type miniature WDM (wavelength division multiplexer), and the photoelectric conversion unit 6 includes an InGaAs (indium gallium arsenide) photovoltaic cell, which converts the 808nm wavelength power laser into direct current. The electro-optical conversion unit 7 includes a 1300nm light-emitting diode, which converts the current into an optical signal for emission. Optical coupling between the wavelength division multiplexer 5 and the electro-optical conversion unit 7 is achieved through a collimating lens unit 8.

[0039] The working principle of an integrated optical power supply and communication device according to an embodiment of the present invention is as follows: 1. Power supply path: The external power laser (wavelength λ1) enters the device through the fiber optic interface 2, is divided by the wavelength division multiplexer 5, and is received by the photoelectric conversion unit 6 and converted into electrical energy, which is output through the power supply outlet to power external devices.

[0040] 2. Communication uplink path: The external MCU or circuit controls the current switching of the communication optical drive interface to turn the light-emitting diode of the electro-optical conversion unit 7 on and off. The internal light-emitting diode converts electrical energy into optical communication signals (wavelength λ2), which are then combined by the wavelength division multiplexer 5 and sent to the external optical fiber through the optical fiber interface 2.

[0041] The integrated optical power supply and communication device provided by this invention significantly reduces the size and weight of the device by integrating optical power reception, photoelectric conversion, optical communication transceiver and wavelength division multiplexing functions into a single miniaturized package, realizing the complete function of "one fiber for power transmission and communication". At the same time, the external interfaces are unified as optical fiber port, power supply port and communication optical drive port, supporting plug and play, simplifying system deployment and debugging, and reducing the cost of optical fiber connectors and cables between discrete modules. In addition, the integrated design reduces interface mismatch and connection loss between modules, which helps to improve the overall reliability of the system, and is especially suitable for aviation fuel measurement and other optical power transmission scenarios with strict requirements for space, weight and reliability.

[0042] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An integrated device for optical power supply and communication, characterized in that, include: A package housing having a first end face and a second end face; A fiber optic interface is disposed on the first end face of the encapsulation housing for connecting an external fiber optic cable; A power supply outlet is located on the second end face of the encapsulation housing for outputting electrical energy to the outside; A communication optical drive interface is disposed on the second end face of the package housing for receiving external current on / off signals for communication. A wavelength division multiplexer is disposed within the encapsulation housing, and the common terminal of the wavelength division multiplexer is optically coupled to the optical fiber interface; A photoelectric conversion unit is disposed inside the package housing. The input end of the photoelectric conversion unit is optically coupled to the first branch end of the wavelength division multiplexer, and the output end of the photoelectric conversion unit is electrically connected to the power supply outlet, for converting the received first wavelength power supply laser into electrical energy. An electro-optical conversion unit is disposed within the package housing. The input terminal of the electro-optical conversion unit is electrically connected to the communication optical drive interface, and the output terminal of the electro-optical conversion unit is optically coupled to the second branch terminal of the wavelength division multiplexer, for converting the current on / off signal into an optical communication signal of the second wavelength. The first wavelength is different from the second wavelength. The power supply laser and the optical communication signal are combined by the wavelength division multiplexer and then transmitted to the external optical fiber through the optical fiber interface.

2. The integrated optical power supply and communication device according to claim 1, characterized in that, The output of the electro-optic conversion unit is optically coupled to the second branch of the wavelength division multiplexer through a collimating lens unit.

3. The integrated optical power supply and communication device according to claim 1, characterized in that, The package housing is a TO-can metal package, ceramic package, or QFN plastic package, and the dimensions of the package housing meet the following requirements: length ≤ 20mm, width ≤ 15mm, and height ≤ 15mm.

4. The integrated optical power supply and communication device according to claim 1, characterized in that, The wavelength division multiplexer is optically coupled to the photoelectric conversion unit and the electro-optical conversion unit through free-space optical coupling or a microlens array.

5. The integrated optical power supply and communication device according to claim 1, characterized in that, The wavelength division multiplexer is a thin-film filter-type micro wavelength division multiplexer, an arrayed waveguide grating, or a tapered wavelength division multiplexer.

6. The integrated optical power supply and communication device according to claim 1, characterized in that, The bottom or side of the encapsulation housing is provided with a heat dissipation structure, which is thermally connected to the photoelectric conversion unit.

7. The integrated optical power supply and communication device according to claim 1, characterized in that, The photoelectric conversion unit includes an InGaAs photovoltaic cell or a six-junction gallium arsenide photovoltaic cell; the electro-optic conversion unit includes a laser diode or a light-emitting diode.

8. The integrated optical power supply and communication device according to claim 1, characterized in that, The fiber optic interface is an FC / PC standard interface.

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