Broadband chaotic laser generating device and method based on asymmetric double-path optical feedback

A chaotic laser and generating device technology, applied in lasers, laser components, circuits, etc., can solve the problems of narrow bandwidth and uneven spectrum of chaotic lasers, and achieve the effects of bandwidth expansion, reasonable design, and high spectrum flatness

Active Publication Date: 2021-10-08
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0005] The present invention aims to solve the problem of narrow bandwidth and uneven spectrum of chaotic laser generated by the existing optical feedback structure, and proposes a broadband chaotic laser generation device and method based on asymmetric dual-path optical feedback to improve the bandwidth of chaotic laser

Method used

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  • Broadband chaotic laser generating device and method based on asymmetric double-path optical feedback
  • Broadband chaotic laser generating device and method based on asymmetric double-path optical feedback

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Embodiment 1

[0025] Such as figure 1 As shown, the embodiment of the present invention provides a broadband chaotic laser generating device based on asymmetric dual-channel optical feedback, including a semiconductor laser 1, an optical circulator 2, a first beam splitter 3, an optical amplifier 4, a second beam splitter 5, a first attenuation controller 6, a first polarization controller 7, a tunable optical bandpass filter 8, a second attenuation controller 9, a second polarization controller 10 and a beam combiner 11.

[0026] Wherein, the first port of the optical circulator 2 is connected to the output end of the semiconductor laser 1 through a single-mode fiber jumper, the second port is connected to the input end of the first beam splitter 3 through a single-mode fiber jumper, and the third The port is connected to the output end of the beam combiner 11 through a single-mode fiber jumper.

[0027] The second output end of the first beam splitter 3 is used as the output end of the d...

Embodiment 2

[0034] Embodiment 2 of the present invention provides a method for generating a broadband chaotic laser based on asymmetric two-way optical feedback, which is implemented based on the device for generating broadband chaotic laser based on asymmetric two-way optical feedback described in Embodiment 1, including the following steps : through the first attenuation controller 6 and the first polarization controller 7 to control the intensity and polarization state of the first feedback light respectively; through the tunable optical bandpass filter 8, the second attenuation controller 9, the second polarization controller 10 The frequency detuning, intensity and polarization state of the second feedback light are controlled respectively.

[0035] The effects of filter frequency detuning, filter bandwidth, and filter feedback strength on the bandwidth and flatness of the generated chaotic laser are investigated. It is found that when the filter frequency detuning changes from -90.0...

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Abstract

The invention belongs to the technical field of chaotic laser, and discloses a broadband chaotic laser generating device and method based on asymmetric double-path optical feedback. The device and the method are as follows: laser output by a semiconductor laser is divided into two beams by a first beam splitter to serve as output light and feedback light respectively, and the feedback light is divided into two beams by a second beam splitter to serve as output light and feedback light respectively; and the first feedback light sequentially passes through the first attenuation controller and the first polarization controller and then enters the beam combiner, the second feedback light sequentially passes through the tunable optical band-pass filter, the second attenuation controller and the second polarization controller and then enters the beam combiner, and the two beams of light passing through the beam combiner are combined together and fed back to the semiconductor laser. The bandwidth of the chaotic laser is enhanced by utilizing the beat frequency effect between the main mode and the filtering mode of the laser, the broadband chaotic laser with the standard bandwidth of 36.1 GHz and the spectrum flatness of 5.8 dB is finally generated, and the broadband chaotic laser is suitable for the fields of communication, sensing, information security and the like.

Description

technical field [0001] The invention belongs to the technical field of chaotic lasers, in particular to a broadband chaotic laser generating device and method based on asymmetric dual-path optical feedback, which is applicable to the fields of optical communication, sensing, information security and the like. Background technique [0002] Due to its wide-spectrum and noise-like properties, chaotic lasers have been widely used in secure communications, random number generation, fiber optic sensing, and artificial intelligence. At present, the methods of using semiconductor lasers to generate chaotic laser include optical feedback, optical injection and photoelectric feedback. However, since the energy output by the laser is mainly concentrated near the relaxation oscillation frequency, the effective bandwidth and low-frequency component energy of the chaotic laser are limited, resulting in a narrow bandwidth and uneven power spectrum of the chaotic laser, which greatly limits...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/10
CPCH01S3/10H01S3/10023
Inventor 张明江李舒卉杨强柴萌萌乔丽君张建忠王涛髙少华薛晓辉马喆
Owner TAIYUAN UNIV OF TECH
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