A remote self-powered optoelectronic information processing system

Abstract

The present invention discloses a remote self-powered optoelectronic information processing system, comprising a local processing module, an optical fiber and a remote processing module; the local processing module sends an optical signal to the remote processing module through the optical fiber, the optical signal comprising a signal light, a carrier light and a pump light; the remote processing module separates and modulates the received optical signal, and transmits the modulated carrier light back to the local processing module through the optical fiber. The present invention can significantly reduce the system complexity and deployment cost of the remote end.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical transmission, and in particular relates to a remote self-powered optoelectronic information processing system. Background Art

[0002] Optical fiber has the advantages of large transmission bandwidth, low transmission loss, and resistance to electromagnetic interference. Optical transmission achieved through optical fiber has broad applications in 5G / 6G communications, the Internet of Things, microwave photonics and other application technologies. With the rapid development of related technologies, it is necessary to deploy small and dense micro base stations and front-end devices on a large scale, which puts great pressure on cost and energy consumption. The technology of simultaneous transmission of information and energy over optical fiber provides a new and effective solution, which transmits both information and energy through optical fiber, and has the advantages of low cost, high reliability, low power consumption, and resistance to harsh environments.

[0003] The information-carrying-energy simultaneous transmission technology transmits signal light and energy light from a local long distance to a base station. The signal light is converted into an electrical signal through a photoelectric detector; the energy light is converted into electrical energy through photovoltaic or photoelectric detection, providing energy for the terminal to process the demodulated electrical signal. In 1978, Bell Laboratories in the United States developed a prototype based on fiber optic energy transmission technology to power a remote sound alarm system. Subsequently, with the rapid development of semiconductor lasers and significant progress in fiber optic technology, the power upper limit of energy light has increased significantly, the optical power threshold of optical fiber has increased, and the transmission loss has decreased. The energy transfer magnitude, transmission distance, and communication rate achieved by information-carrying-energy simultaneous transmission have increased significantly. Using the information-carrying-light energy transmission technology, Tetsuya's team realized the transmission of 2.4GHz bandwidth wireless signals in 2003; Wake's team realized 64-QAM OFDM broadband signal transmission based on the IEEE802.11g standard in 2008; Matsuura's team realized 60W fiber power feeding in 2015, with a fiber transmission distance of ≥300m, which can provide ≥10W of power to remote devices; subsequently, Matsuura's team proposed a 150W fiber power feeding system using double-clad optical fiber in 2019, realizing the transmission of optical power with a transmission distance of ≥1km and power output of ≥7W. The relevant schemes and systems have important application value in special scenarios such as flammable and explosive, strong electromagnetic interference, and strong radiation. my country's power grid system has carried out the application of information-carrying-light energy transmission technology to realize the working status monitoring of high-voltage power grids.

[0004] In addition to transmitting digital signals, the information-carrying-energy simultaneous transmission technology can also be used to transmit microwave radio frequency signals. The Matsuura team and Zou Xihua team have both verified the microwave photon analog radio frequency transceiver front-end technology based on optical fiber energy transmission, further broadening the application scope and prospects of the information-carrying-energy simultaneous transmission technology.

[0005] However, the optical information-carrying energy transmission system currently used often uses the electrical energy generated by photoelectric conversion to drive the directly modulated laser when transmitting information back, so as to transmit the information received at the remote end or the working status of the monitoring unit back to the local. Since an additional electro-optical conversion process is required at the remote end, there are problems such as low energy efficiency and high failure rate. Summary of the invention

[0006] Purpose of the invention: In order to solve the problems existing in the above-mentioned prior art, the present invention provides a remote self-powered optoelectronic information processing system.

[0007] Technical solution: The present invention discloses a remote self-powered optoelectronic information processing system, comprising a local processing module, an optical fiber and a remote processing module; the local processing module sends an optical signal to the remote processing module via the optical fiber, wherein the optical signal comprises a signal light, a carrier light and a pump light; the remote processing module separates and modulates the received optical signal, and transmits the modulated carrier light back to the local processing module via the optical fiber.

[0008] Furthermore, the local processing module includes a laser modulation module, a first wavelength division multiplexer, a circulator, a first laser, a pump laser and a beam combiner; the laser modulation module outputs the modulated signal light λ1 to the first wavelength division multiplexer, the first laser outputs the carrier light λ2 to the first port of the circulator, the second port of the circulator outputs the carrier light λ2 to the first wavelength division multiplexer, the first wavelength division multiplexer realizes the combination of two optical signals, and sends the combined optical signal to the beam combiner, the pump laser sends the pump light to the beam combiner, and the beam combiner outputs the combined optical signal to the optical fiber.

[0009] Furthermore, the laser modulation module is a modulated laser or includes a second laser and a first electro-optical modulator.

[0010] Furthermore, if the laser modulation module includes a second laser and a first electro-optical modulator, the second laser emits signal light to the optical input port of the first electro-optical modulator, external transmission information is fed into the electrical input port of the first electro-optical modulator, and the optical output port of the first electro-optical modulator outputs the modulated signal light to the first wavelength division multiplexer.

[0011] Furthermore, the local processing module also includes a first information processing module, and the first information processing module is connected to the third port of the circulator.

[0012] Furthermore, the remote processing module includes a beam splitter, a coupler, a second and a third wavelength division multiplexer, a second electro-optical modulation module, an active optical fiber and an optical reflector; the beam splitter separates the pump light from the optical signal and inputs the pump light to the coupler, the first output end of the coupler is connected to the third wavelength division multiplexer, the beam splitter inputs the optical signal separated from the pump light to the second wavelength division multiplexer, the second wavelength division multiplexer separates the carrier light and the signal light, and inputs the separated carrier light to the first optical port of the second electro-optical modulator, the external return signal is connected to the electrical input end of the second electro-optical modulator, the second optical port of the second electro-optical modulator is connected to the third wavelength division multiplexer, and the third wavelength division multiplexer, the active optical fiber and the optical reflector are connected in sequence.

[0013] Furthermore, the remote processing module also includes a photoelectric conversion module, a power management module and a second information processing module. The second output end of the coupler is connected to the photoelectric conversion module, the photoelectric conversion module is connected to the power management module, and the second wavelength division multiplexer inputs the separated signal light to the second information processing module; the power management module supplies power to the second information processing module.

[0014] Furthermore, the optical fiber is a single-mode optical fiber, a multi-mode optical fiber, a double-clad optical fiber, or a combination of the above optical fibers.

[0015] Furthermore, an active optical fiber is connected to the optical fiber.

[0016] Beneficial effects: The present invention transmits pump light, signal light, and carrier light at the local end to the remote end, and realizes photoelectric energy conversion of pump light at the source end to provide electrical energy for other processing devices, which can significantly reduce the system complexity and deployment cost at the remote end; at the same time, the pump light transmitted from the local end to the remote end can amplify the carrier light at the remote end to meet the needs of long-distance information backhaul, which can further reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A circuit diagram of a first embodiment of the present invention;

[0018] Figure 2 This is a circuit diagram of Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0019] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Embodiment 1: Figure 1 As shown, a remote self-powered optoelectronic information processing system provided by the present invention includes a local processing module, an optical fiber, and a remote processing module. The local processing module and the remote processing module are connected via the optical fiber.

[0021] The local processing module is connected to the remote processing module through optical fiber. The local processing module transmits various optical signals such as pump light, information light, carrier light, etc. to the remote processing module through the optical fiber without transmitting electrical signals. The optical fiber can be a single-mode optical fiber, a multi-mode optical fiber, a double-clad optical fiber, or a combination of the above optical fibers. Some active optical fibers can also be connected to the optical fiber to amplify the information light and the carrier light and transmit them to a longer distance.

[0022] The local processing module is composed of a first laser, a second laser, a pump laser, a first electro-optical modulator, a circulator, a first information processor, a first wavelength division multiplexer, a combiner and other devices. The first laser outputs a carrier light with a wavelength of λ1 and is connected to the optical input port of the first electro-optical modulator; the transmission information is fed into the electrical input port of the first electro-optical modulator to modulate λ1 to generate signal light; the second laser outputs an optical carrier with a wavelength of λ2 as the carrier light to be transmitted; the second laser is connected to the input port of the circulator, and the transmission output port of the circulator is connected to the first information processor; the optical output port of the first electro-optical modulator and the output port of the circulator are respectively connected to the two input ports of the first wavelength division multiplexer to combine the two optical signals; the output end of the first wavelength division multiplexer is connected to an input port of the combiner. The pump laser output wavelength is λ pump The pump light is connected to the other input port of the beam combiner.

[0023] The second laser is connected to the circulator and can be loaded with information while realizing carrier light transmission.

[0024] The remote processing module is composed of a beam splitter, a coupler, a second wavelength division multiplexer, a second electro-optical modulator, a second information processor, a third wavelength division multiplexer, an active optical fiber, an optical reflector, an optoelectronic converter, a power management module and other devices. The beam splitter converts the pump light λ pump Separated from the signal light λ1 and the carrier light λ2, the pump light λ pumpThe signal light λ1 and the carrier light λ2 are output from one port of the beam splitter, and then connected to the coupler, the photoelectric converter and the power management module in sequence; the signal light λ1 and the carrier light λ2 are output from the other port of the beam splitter, and then connected to the second wavelength division multiplexer. The second wavelength division multiplexer separates the signal light λ1 and the carrier light λ2, and the signal light λ1 is input to the second information processor, and the power port of the second information processor is connected to the power management module; the carrier light λ2 is input to the optical input port of the second electro-optical modulator, and the optical output port of the second electro-optical modulator is connected to an input end of the third wavelength division multiplexer, and the output end of the third wavelength division multiplexer, the active optical fiber and the optical reflector are connected in sequence, and the second wavelength division multiplexer transmits the carrier light λ2 to the active optical fiber through the third wavelength division multiplexer, and the active optical fiber amplifies the carrier light λ2 through the pump light, and transmits the amplified carrier light λ2 back to the second electro-optical modulator through the active optical fiber and the third wavelength division multiplexer through the optical reflector, thereby realizing the modulation of the returned signal. The optical reflector transmits the amplified carrier light λ2 back to the first information processor of the local processing module through the active optical fiber, the third wavelength division multiplexer, the second electro-optical modulator, the second wavelength division multiplexer, the beam splitter and the optical fiber to process the returned information.

[0025] The photoelectric converter of this embodiment can be a series structure to increase the output voltage, or a parallel structure to increase the output current.

[0026] Embodiment 2: Figure 2 As shown, in this embodiment, the signal light is generated by a directly modulated laser, and the rest of the parts are the same as those in the first embodiment.

[0027] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A remote self-powered optoelectronic information processing system, characterized in that: It includes a local processing module, an optical fiber and a remote processing module; the local processing module sends an optical signal to the remote processing module through the optical fiber, and the optical signal includes signal light, carrier light and pump light; the remote processing module separates and modulates the received optical signal, and transmits the modulated carrier light back to the local processing module through the optical fiber.

2. A remote self-powered optoelectronic information processing system according to claim 1, characterized in that: The local processing module includes a laser modulation module, a first wavelength division multiplexer, a circulator, a first laser, a pump laser and a beam combiner; the laser modulation module outputs the modulated signal light λ1 to the first wavelength division multiplexer, the first laser outputs the carrier light λ2 to the first port of the circulator, the second port of the circulator outputs the carrier light λ2 to the first wavelength division multiplexer, the first wavelength division multiplexer realizes the combination of two optical signals, and sends the combined optical signal to the beam combiner, the pump laser sends the pump light to the beam combiner, and the beam combiner outputs the combined optical signal to the optical fiber.

3. A remote self-powered optoelectronic information processing system according to claim 2, characterized in that: The laser modulation module is a modulated laser or includes a second laser and a first electro-optical modulator.

4. A remote self-powered optoelectronic information processing system according to claim 2, characterized in that: If the laser modulation module includes a second laser and a first electro-optical modulator, the second laser emits signal light to the optical input port of the first electro-optical modulator, external transmission information is fed into the electrical input port of the first electro-optical modulator, and the optical output port of the first electro-optical modulator outputs the modulated signal light to the first wavelength division multiplexer.

5. A remote self-powered optoelectronic information processing system according to claim 2, characterized in that: The local processing module also includes a first information processing module, which is connected to the third port of the circulator.

6. A remote self-powered optoelectronic information processing system according to claim 1, characterized in that: The remote processing module includes a beam splitter, a coupler, a second and a third wavelength division multiplexer, a second electro-optical modulation module, an active optical fiber and an optical reflector; the beam splitter separates a pump light from an optical signal and inputs the pump light to the coupler, the first output end of the coupler is connected to the third wavelength division multiplexer, the beam splitter inputs the optical signal separated from the pump light to the second wavelength division multiplexer, the second wavelength division multiplexer separates the carrier light and the signal light, and inputs the separated carrier light to the first optical port of the second electro-optical modulator, the external return signal is connected to the electrical input end of the second electro-optical modulator, the second optical port of the second electro-optical modulator is connected to the third wavelength division multiplexer, and the third wavelength division multiplexer, the active optical fiber and the optical reflector are connected in sequence.

7. A remote self-powered optoelectronic information processing system according to claim 1, characterized in that: The remote processing module also includes a photoelectric conversion module, a power management module and a second information processing module. The second output end of the coupler is connected to the photoelectric conversion module, the photoelectric conversion module is connected to the power management module, and the second wavelength division multiplexer inputs the separated signal light to the second information processing module. The power management module supplies power to the second information processing module.

8. The remote self-powered optoelectronic information processing system according to claim 1, characterized in that: The optical fiber is a single-mode optical fiber, a multi-mode optical fiber, a double-clad optical fiber, or a combination of the above optical fibers.

9. The remote self-powered optoelectronic information processing system according to claim 1, characterized in that: Active optical fiber is connected to the optical fiber.

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