A tunable multi-band terahertz pulse wireless communication transmitter

Abstract

The invention discloses a tunable multi-band terahertz pulse wireless communication transmitting device, comprising: an optical frequency comb generating module, for generating an optical frequency comb; a programmable optical processor, connected with the optical frequency comb generating module and used for performing frequency filtering on the generated optical frequency comb to generate multiple paths of output, each of which includes a single wavelength optical local oscillator and a multi-wavelength optical carrier signal; a modulator, disposed on each output optical path to modulate thebaseband signal to the multi-wavelength optical carrier signal; and a photodetector, connected to each modulator and used for acting on the signal output by the modulator to generate a multi-band terahertz pulse, wherein the center frequency of the terahertz pulse is decided by a center wavelength difference of the each path of output single-wavelength local oscillator and the multi-wavelength baseband optical carrier, the period of the terahertz pulse is controlled by a baseband modulation implemented by the modulator, and the width and time interval of the terahertz pulse are controlled bythe number and interval of wavelengths of the multi-wavelength baseband optical carrier.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a tunable multi-band terahertz pulse wireless communication transmitting device based on an optical frequency comb. Background technique [0002] With the development of modern society, the amount of communication data is increasing exponentially. The spectrum resources of the current wireless communication system can no longer meet the needs of ultra-high-speed wireless communication. Terahertz communication has received extensive attention in recent years. The terahertz frequency band usually refers to 0.3-10THz, and the communication bandwidth is much larger than that of the microwave band. The terahertz communication system based on the photoelectric method can achieve a communication rate of several hundred gigabits (Gbps). [0003] Terahertz communication methods mainly include continuous terahertz carrier modulation and terahertz pulse modulation. The con...

AI Technical Summary

Problems solved by technology

Although this system can solve the problem of limited spectrum resources and capacity in existing wireless communication systems, the center frequency, pulse repetition frequency and pulse width of terahertz communication pulses are uncontrollable, so it cannot adapt to and meet actual application requirements.

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