CN-121984599-A - Transmission system and method based on optical fiber, signal processing method and related device

Abstract

The embodiment of the application provides a transmission system, a transmission method, a signal processing method and a related device based on optical fibers, which are used for solving the problems of obvious cross interference, prominent power coupling loss and limited dynamic range of a system existing in the conventional optical communication and energy cooperative transmission technology based on the optical fibers. The system comprises at least one first optical fiber core, at least one second optical fiber core, a transmitting end and a receiving end, wherein the transmitting end comprises an information transmission module and an energy acquisition module, wherein the information transmission module is used for driving a first light source to output corresponding first modulated light signals to be directionally coupled to the first optical fiber core for transmission based on electric modulation signals obtained by modulating data to be transmitted to the receiving end, the energy transmission module is used for utilizing the second light source to output light energy signals to be directionally coupled to the second optical fiber core for transmission, the receiving end comprises a photoelectric detection module used for capturing the first modulated light signals transmitted through the first optical fiber core, recovering data information borne by the first modulated light signals after demodulating the first modulated light signals, and the energy acquisition module is used for receiving the light energy signals transmitted through the second optical fiber core and converting the light energy signals into electric energy.

Inventors

• LI ZHENHAO
• DAI GUANGLI
• CHEN XIAOMING
• SUN SHUO
• YANG XI
• LIU DONGMEI
• TAN ZHE
• HUANG LETIAN
• YAO BINBIN
• GAO ZHIYING
• WANG DONGBING
• ZHANG YAN
• Qu Shaokai
• Kang shuai
• LI DELI
• ZHANG CONGQING
• LI FENYING
• ZHANG HAIYUN
• WANG LINLI
• ZHANG HAORAN
• Xia Zhongkang
• HE ZHENG
• Yang Tianpu
• WANG YINGCHUN
• XI JIANHUA
• ZHOU ZHIMING
• LI XIN
• LI CHANG

Assignees

• 中国移动通信集团设计院有限公司
• 中国移动通信集团有限公司

Dates

Publication Date

20260505

Application Date

20251231

Claims (10)

1. 1. An optical fiber-based transmission system comprising at least one first optical fiber core and at least one second optical fiber core, a transmitting end and a receiving end, wherein: The transmitting end comprises an information transmission module, an energy transmission module, a first optical fiber core, a second optical fiber core, a first optical source and a second optical source, wherein the information transmission module is used for driving the first optical source to output corresponding first modulated optical signals to be directionally coupled to the first optical fiber core for transmission based on electric modulation signals obtained by modulating data to be transmitted to the receiving end; The receiving end comprises a photoelectric detection module, an energy acquisition module and a power generation module, wherein the photoelectric detection module is used for capturing a first modulated optical signal transmitted by a first optical fiber core, demodulating the first modulated optical signal and then recovering data information borne by the first modulated optical signal, and the power generation module is used for receiving a light energy signal transmitted by a second optical fiber core and converting the light energy signal into electric energy.
2. 2. The transmission system according to claim 1, wherein the information transmission module comprises a photodetection module; the information transmission module comprises a photoelectric detection module which is used for capturing a second modulated optical signal which is transmitted back by the receiving end through a third optical fiber core, demodulating the second modulated optical signal and recovering data information carried by the second modulated optical signal.
3. 3. The transmission system according to claim 1 or 2, wherein the information transmission module comprises a data transmission and driving module, a pre-amplifying and signal processing module, wherein: the data processing and driving module is used for carrying out modulation processing on the data to obtain the electric modulation signal; The pre-amplifying and signal processing module is used for carrying out amplifying and signal conditioning processing on the modulated optical signals and then directionally coupling the processed modulated optical signals to the first optical fiber core for transmission.
4. 4. The transmission system of claim 1, further comprising an optical coupler; the information signal input end of the optical coupler is physically connected with the modulated optical signal output end of the first light source; the optical energy signal input end of the optical coupler is physically connected with the optical energy signal output end of the second light source; The optical coupler is used for outputting the first modulated optical signal output end to the information signal input end, directionally coupling the first modulated optical signal output end to a first optical fiber core, and directionally coupling the optical energy signal output end to the optical energy signal input end to a second optical fiber core.
5. 5. The transmission system of claim 1, wherein the receiving end is an in-vehicle sensor.
6. 6. A method of optical fiber-based transmission, the method comprising: Based on an electric modulation signal obtained by modulating data, driving a first light source to output a corresponding first modulation optical signal, and directionally coupling the first modulation optical signal to a first optical fiber core for transmission; And driving the second light source to output light energy signals, and directionally coupling the light energy signals to the second optical fiber core for transmission.
7. 7. The method of claim 6, wherein the method further comprises: Demodulating the received second modulated optical signal transmitted through the first optical fiber core to recover data information carried by the second modulated optical signal.
8. 8. A method of signal processing, the method comprising: demodulating a received modulated optical signal transmitted through a first optical fiber core to recover data information carried by the modulated optical signal; and converting the received optical energy signal transmitted through the second optical fiber core to convert the optical energy signal into electric energy.
9. 9. An optical fiber-based transmission device, the device comprising: The first light source driving unit is used for driving the first light source to output corresponding first modulated light signals based on electric modulation signals obtained by modulating data and directionally coupling the corresponding first modulated light signals to the first optical fiber core for transmission; The second light source driving unit is used for driving the second light source to output light energy signals which are directionally coupled to the second optical fiber core for transmission.
10. 10. A signal processing apparatus, the apparatus comprising: The demodulation unit is used for demodulating the received modulated optical signal transmitted through the first optical fiber core so as to recover the data information carried by the modulated optical signal; And the conversion unit is used for converting the received optical energy signal transmitted through the second optical fiber core so as to convert the optical energy signal into electric energy.

Description

Transmission system and method based on optical fiber, signal processing method and related device Technical Field The present application relates to the field of optical fiber communications technologies, and in particular, to a transmission system, a method, a signal processing method and a related device based on an optical fiber. Background In modern communication technology, optical fibers are widely used for information transmission due to the advantages of high bandwidth, low loss, electromagnetic interference resistance and the like. However, with the rapid development of optical communication systems, new demands are being made on the application of optical fibers. Conventional optical fiber transmission systems are generally only responsible for information transmission, while energy transmission relies on copper cables. This separate transmission approach results in redundancy and complexity of the harness, increasing the weight, cost and failure rate of the system, while also limiting the lightweight and integrated development of the system. For example, in vehicle systems, these problems become more apparent. In the scenario of optical communication and energy cooperative transmission, the wavelength division multiplexing (WAVELENGTH DIVISION MULTIPLEXING, WDM) technology can implement that two types of core signals, i.e. high-power laser signals for energy transmission and high-speed modulated laser signals for information interaction, are simultaneously carried in a single transmission optical fiber. From the technical architecture, the transmitting end of the scheme is provided with two laser light sources with different wavelengths, wherein the first light source outputs high-power laser meeting the energy transmission power requirement, the second light source outputs high-speed information laser subjected to modulation treatment (such as amplitude modulation, phase modulation and the like), then two laser signals with different wavelengths are connected into a wavelength division multiplexer, integrated into one-path combined signal through the combining function of the wavelength division multiplexer, and the combined signal is injected into a single transmission optical fiber to finish long-distance transmission. The receiving end is provided with a wave-division multiplexer matched with the wave-division multiplexer at the transmitting end, the wave-division function of the wave-division multiplexer is used for re-separating the composite wave signal output by the transmission optical fiber into a high-power laser signal and a high-speed modulation laser signal, the separated two signals need to enter a corresponding processing unit, namely the high-speed modulation laser signal is connected with a photoelectric conversion module and converted into an electric signal through photoelectric conversion treatment so as to realize subsequent information demodulation, and the high-power laser signal is connected with an energy receiving module and is converted or directly utilized through energy so as to complete energy recovery. Although the WDM technology realizes the synchronous transmission of energy and data signals in a single optical fiber, the scheme faces two major core problems of physical layer coupling interference and energy efficiency nonlinear attenuation in practical application, and directly restricts the transmission reliability and overall performance of the system: Firstly, there is a remarkable cross interference mechanism, namely, due to the signal characteristic difference (such as power density and frequency bandwidth) of high-power energy laser and high-speed modulation data laser, in the multiplexing/de-multiplexing process of transmitting end multiplexing and receiving end multiplexing, asymmetric frequency deviation can be generated due to uneven refractive index distribution in an optical fiber or a multiplexer, and the frequency deviation directly causes the phase and amplitude stability of a data signal to be damaged, so that the system Bit Error Rate (BER) is raised, and even the integrity of data transmission is damaged in serious cases; Secondly, the problem of power coupling loss is prominent, namely, the nonlinear effect (typically stimulated brillouin scattering) of the optical fiber is easy to excite due to the high power characteristic of the energy signal, the effect can convert the power of part of the energy signal into back scattered light, so that not only is the loss of energy transmission per se caused, but also noise interference is formed on the data signal transmitted by the same fiber, the signal-to-noise ratio (SNR) of the data signal is obviously reduced, and the signal identification sensitivity of a data receiving end is reduced; Thirdly, the dynamic range of the system is limited, namely, the energy signal needs to maintain constant power output to ensure the energy transmission efficiency (for example, the power supply requirement of th