A multi-core optical fiber transmission perception method and system based on discrete multi-tone modulation

A discrete multi-audio, multi-core optical fiber technology, applied in transmission systems, electromagnetic wave transmission systems, electrical components, etc., can solve the problems of signal loss at baud rate, simultaneous crosstalk monitoring, etc., to achieve fault prevention, fast and accurate system transmission Performance degradation, the effect of simple system transport performance degradation

Active Publication Date: 2022-05-06
HUAZHONG UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

However, the existing inter-core crosstalk monitoring solutions cannot achieve simultaneous signal transmission and crosstalk monitoring, and the general crosstalk monitoring requires a long period of signal power averaging (>100ms). For signals with higher and higher baud rates too much loss

Method used

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  • A multi-core optical fiber transmission perception method and system based on discrete multi-tone modulation
  • A multi-core optical fiber transmission perception method and system based on discrete multi-tone modulation
  • A multi-core optical fiber transmission perception method and system based on discrete multi-tone modulation

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Embodiment

[0098] Such as image 3 As shown, the embodiment provides a schematic diagram of a typical multi-core optical fiber transmission system, including three parts: a sending end, a transmission link, and a receiving end.

[0099] In the sending end, a tunable laser working in the C-band is used as the light source. After the signal to be sent is inserted into the crosstalk probe, precoded, discrete multi-tone modulation, added cyclic prefix and training sequence, the data is completed by the arbitrary waveform generator. The analog signal is obtained by mode conversion, and after being amplified by the electric amplifier, the modulator is driven to generate a modulated optical signal, and the coupler is coupled into the No. 1 core of the transmission link formed by the multi-core optical fiber;

[0100] A tunable laser operating in the C-band is used as the crosstalk core light source, coupled into the No. 2 core of the transmission link formed by the multi-core fiber through a co...

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Abstract

The invention discloses a multi-core optical fiber transmission sensing method based on discrete multi-tone modulation: a crosstalk probe is inserted into the signal at the transmitting end, pre-coding preprocessing is performed on the signal, and discrete multi-tone modulation is performed on the pre-coded signal , and add a cyclic prefix; the modulated signal is loaded onto the optical carrier through the electro-optic modulator, and the optical carrier loaded with the modulated signal is transmitted through the multi-core optical fiber; the received optical information is sampled and frame-synchronized before de-discrete Multi-tone modulation and channel equalization, and deprecoding to obtain the crosstalk probe value, extract the transmitted signal; monitor the system working status in the warm-up state and working state respectively. The invention realizes crosstalk monitoring and signal transmission at the same time, making it possible to monitor the crosstalk phenomenon in the channel when the multi-core optical fiber is used for space division multiplexing signal transmission. The invention also provides a corresponding multi-core optical fiber transmission perception system based on discrete multi-tone modulation.

Description

technical field [0001] The invention belongs to the field of optical fiber communication systems, and more specifically relates to a multi-core optical fiber transmission sensing method and system based on discrete multi-tone modulation. Background technique [0002] The optical communication network covers a wide range of application scenarios, covering product lines such as transmission, access, and data communication. Among them, short-distance interconnection scenarios mainly cover data center optical connections and interconnection scenarios below 80km. In recent years, with the popularization of smart terminals and the development of new network services, network traffic has grown explosively, which has brought enormous pressure on the capacity of communication systems. In order to meet the needs of massive data transmission, multiple multiplexing methods have been proposed, among which the easiest way to implement is space division multiplexing, which transmits in pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/079
CPCH04B10/0795
Inventor 唐明童天昊
Owner HUAZHONG UNIV OF SCI & TECH
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