Chaotic laser delay suppression device based on light injection amplified spontaneous radiation

Abstract

The invention belongs to the technical field of chaotic laser, and discloses a chaotic laser delay suppression device based on light injection amplified spontaneous radiation, which comprises a laser,a polarizing film, an optical circulator, a first beam splitter, a spontaneous radiation source and a second beam splitter, and light emitted by the laser passes through the polarizing film and thenenters from a first port of the optical circulator. A second port emits light, the light is divided into two beams of light through the second beam splitter, one beam of light and an emergent signal of the spontaneous radiation source pass through the first beam splitter together and then enter from the third port of the optical circulator, the first port emits light and then returns to the polarizing film and the laser in sequence, and the other beam of light outputs delay-suppressed chaotic laser. According to the invention, the delay characteristic of the output chaotic light can be effectively suppressed, and a new means is provided for suppressing the delay characteristic of the external cavity of the distributed feedback type semiconductor laser.

Description

technical field [0001] The invention relates to the field of chaotic lasers, in particular to a chaotic laser device based on light injection, amplification of spontaneous radiation, suppression of time delay. Background technique [0002] Distributed feedback semiconductor lasers belong to Class B lasers. Distributed feedback semiconductor lasers are small in size, good in mechanical stability, narrow in bandwidth of output light, can work stably in high-speed modulation state, the center wavelength is stable at 1550nm, and the output laser wavelength is affected by temperature. Small, so it can be directly coupled into single-mode fiber for optical communication. The bandwidth of its output chaotic laser signal under external disturbance can reach GHz level, and has complex dynamic behavior, so distributed feedback semiconductor laser can be widely used in chaotic secure communication, chaotic lidar and as a physical entropy source to generate high-speed true random field...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of obvious external cavity delay characteristics in the output chaotic laser due to the external cavity feedback effect of the laser, the present invention proposes a chaotic laser device based on light injection amplification spontaneous emission suppression delay

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