Triangular wave generation device based on stimulated brillouin scattering effects

Abstract

The invention discloses a triangular wave generation device based on stimulated brillouin scattering effects. The triangular wave generation device comprises a first laser source (a), a first intensity modulator (b), a first microwave source (a), a dispersion-shifted optical fiber (d), a second laser source (2), a second intensity modulator (f), a second microwave source (g), an erbium-doped fiber amplifier (h), a first optical filter (g), an erbium-doped fiber amplifier (h), a first optical filter (i), an optical circulator (j), an optical filter (k) and a photoelectric detector (1), wherein the optical circulator (j) is provided with a first port (1), a second port (2) and a third port (3). The triangular wave generation device has the advantages that the structure is simple; for frequency-one microwave signals and frequency-tripled microwave signals, the ratio of phases reaches 1:3, and the ratio of amplitudes reaches 1:9; the power consumption is low, and the compatibility is high.

Description

technical field [0001] The invention belongs to the field of microwave photonics, in particular to a triangular wave generating device based on the stimulated Brillouin scattering effect. Background technique [0002] At present, researchers are focusing their attention on the generation of arbitrary microwave waveforms. The main reason is that arbitrary waveform generation has been widely used in many research fields such as radar, antenna, radio frequency communication, and electronic device testing. Recently, people have produced feasible electrical methods and devices to generate microwave arbitrary waveforms, but the disadvantage is that the generated microwave waveforms are limited to low frequencies and small bandwidths. In the generation of a large number of arbitrary waveforms, the generation of triangular wave electrical pulses is a hot spot that many researchers pay attention to. Since the triangular electric pulse waveform only contains the optical carrier and t...

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Problems solved by technology

[0005] The present invention also aims to solve the problem that it is difficult to control the phase relationship between the double frequency and triple frequency microwave signals to satisfy the 1:3 relationship in the scheme based on the modulator in the optically generated triangular wave, and it is difficult to eliminate the influence of the generated double frequency microwave signal The problem

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