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Spectral broadening device for chaotic laser signals and method thereof

A chaotic laser signal and spectrum broadening technology, which is applied in the fields of optical communication, radar detection and encryption, can solve the problems of weak energy of low frequency and high frequency components, and achieve the effect of convenient debugging, easy integration and application, and simple structure

Active Publication Date: 2012-07-18
TAIYUAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0005] Although the bandwidth of the chaotic laser signal generated by using the nonlinear characteristics of the laser is very wide, the spectrum only has a lot of energy near the relaxation oscillation of the laser, and there are steep drops on both sides, so the energy of the low-frequency and high-frequency components is very weak.

Method used

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  • Spectral broadening device for chaotic laser signals and method thereof
  • Spectral broadening device for chaotic laser signals and method thereof
  • Spectral broadening device for chaotic laser signals and method thereof

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Experimental program
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Embodiment approach 1

[0028] Such as figure 2 As shown, the chaotic light generated by the chaotic laser signal generating device propagates in the optical fiber, and the chaotic laser signal is divided into the first chaotic laser signal and the second chaotic laser signal through the fiber coupler 1a, and the second chaotic laser signal is incident on the optical amplifier 2 After amplifying, the amplified light passes through the polarization controller 3a to control the polarization characteristics of the light, and then returns to the fiber coupler 1a again to form a fiber ring oscillator, which oscillates the chaotic laser signal in a circular manner, so that the oscillating frequency in the chaotic laser signal The components will be continuously superimposed and enhanced in the ring to reach saturation, forming a broadband flat chaotic laser signal, which is then mixed with the first chaotic laser signal and output through the fiber coupler 1a. To convert it into an electrical signal, just...

Embodiment approach 2

[0030] Such as image 3 As shown, the chaotic light generated by the chaotic laser signal generating device propagates in free space, and the chaotic laser signal is divided into the first chaotic laser signal and the second chaotic laser signal by the beam splitter 1b, and the second chaotic laser signal is collimated through the optical fiber The mirror (4) collimates the chaotic laser signal into the optical fiber, converts it to propagate in the optical fiber, and enters the optical amplifier 2 for amplification. The amplified light is converted into free space by the fiber collimator 4, and then passes through the polarizer 3b controls the polarization characteristics of the light, and returns to the beam splitter 1b again to form a ring oscillator to cyclically oscillate the chaotic laser signal, so that the oscillating frequency components in the chaotic laser signal will be continuously superimposed and enhanced in the ring to reach saturation. A broadband flat chaotic...

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Abstract

The invention relates to a spectral broadening device for chaotic laser signals and a method thereof. The spectral broadening device is characterized in that a first chaotic laser signal is output by an optical splitter; a second chaotic laser signal is input into a polarization control device through an optical amplifier, then is input into the optical splitter through a polarization control device and is output. The spectral broadening device is additionally provided with a ring oscillator which is used for carrying out circular amplification and oscillation on injected lights; the polarization control device adjusts the polarization state of the chaotic laser signals; and the bandwidth reaches above 26.5 GHz. The spectral broadening device has simple structure and is convenient to debug and apply.

Description

technical field [0001] The present invention is related to the chaotic laser signal generating device and its generating method. More specifically, it is a device and method for adding a ring oscillator behind the chaotic laser signal generating device to broaden the spectrum of the chaotic laser signal, and is suitable for optical communication , radar detection and encryption and other fields. technical background [0002] Broadband chaotic signals have been widely concerned, and many applications such as chaotic secure communication, chaotic lidar, chaotic optical time domain reflectometer and random number generator have been proposed one after another. Among them, the bandwidth of the chaotic signal determines the quality of the chaotic signal in various fields, such as: the rate of the signal that can be hidden in the chaotic secure communication, the measurement accuracy in the ranging system and the rate of the random number generated by the random number generator ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H01S5/40H01S3/23G02F1/35G02F1/39
Inventor 王安帮王云才赵彤张明江徐航张建忠王冰洁
Owner TAIYUAN UNIV OF TECH
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