Terahertz wireless optical fiber expansion device and real-time transmission system thereof

Abstract

The invention relates to a terahertz wireless optical fiber expansion device and a real-time transmission system thereof, and the device comprises a second semiconductor laser, an optical heterodyne terahertz signal generation module which is used for receiving a first polarization multiplexing optical signal in an optical fiber in a transmitting link, the first optical local oscillator signal and the first polarization multiplexing optical signal are respectively subjected to polarization beam splitting into two paths of orthogonal polarization state signals, and two paths of terahertz signals for wireless transmission are generated in an optical heterodyne mode; the intermediate-frequency signal modulation module is used for performing down-conversion on the two paths of wirelessly transmitted terahertz signals in the receiving link to obtain two paths of intermediate-frequency signals, generating a second optical carrier signal, modulating the two paths of intermediate-frequency signals to two orthogonal polarization state signals of the second optical carrier signal respectively, combining the two paths of intermediate-frequency signals to generate a second polarization multiplexing optical signal, and optical fiber transmission is carried out. Seamless interconnection between an optical fiber link and a terahertz wireless link is realized, use of a large-working-bandwidth electric mixer and a high-frequency local oscillator source is avoided, and the flexibility of generating carrier frequency is enhanced.

Description

technical field [0001] The invention relates to the technical field of photonic terahertz wireless communication, in particular to a terahertz wireless optical fiber extension device and a real-time transmission system thereof. Background technique [0002] With the rapid development of B5G / 6G communication technology, future communication networks will have increasing demands on transmission rate and data capacity. Not only aiming at the data transmission rate of terabits per second, but also striving to expand the coverage of the network architecture and support multiple application scenarios, which puts forward higher requirements for the development of next-generation access technologies. [0003] Traditional optical fiber communication is the best choice for establishing a data transmission network with ultra-large capacity, ultra-long distance, ultra-high speed and ultra-wide coverage due to its ultra-wide spectral bandwidth, low loss, and low electromagnetic interfere...

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention proposes a terahertz wireless optical fiber extension device and its real-time transmission system, which solves the problem that the all-electric method has high requirements on the working range of the device, which leads to the limitation of the upper limit and flexibility of the generated terahertz carrier frequency, and the existing optical fiber Lack of real-time transmission scheme in terahertz wireless transmission system

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