A semiconductor chaotic laser with integrated double feedback

Abstract

The invention relates to the chaotic laser field, and specifically relates to a semiconductor chaotic laser integrated with double feedback. The semiconductor chaotic laser integrated with double feedback solves the technical problems that a current chaotic laser generation apparatus is large in volume, is easy to be influenced by the environment, and is unstable in outputting. The semiconductor chaotic laser utilizes double feedback to improve the chaotic bandwidth of an integrated device to make the frequency spectrum to be more flat. For the semiconductor chaotic laser, a double-cavity structure eliminates the fixed time delay of a common single-cavity integrated laser chip; the double feedback cavity are similar in length but are different so that the time delay characteristic of the single-cavity integrated laser is thoroughly eliminated; the security for chaotic communication, the accuracy for chaotic laser ranging, and the randomness of the randomized number are improved; and the semiconductor chaotic laser can be applied to the communication field, the remote sensing field, the sensing field and the like. The semiconductor chaotic laser integrated with double feedback only uses a DFB laser chip, a high performance photoelectric detector and a plane lens fiber to realize chaotic output and detection, and can realize simultaneous output of a chaotic laser signal and a chaotic electric signal. The semiconductor chaotic laser integrated with double feedback also has the advantages of being small in the volume of the integrated structure and being low in cost.

Description

technical field [0001] The invention relates to the field of chaotic lasers, in particular to a semiconductor chaotic laser with integrated double feedback. Background technique [0002] Chaos laser is a new and important scientific research tool with wide application. As a special output form of lasers, chaotic laser has the characteristics of randomness and wide frequency spectrum. Due to the characteristics of light weight, small size, high conversion efficiency, long life, and strong integration, semiconductor lasers have become the most important devices for generating chaotic lasers. [0003] High-quality chaotic lasers have important applications in many aspects such as chaotic secure optical communication based on physical layer encryption, physical random number generation, laser radar, optical fiber network fault detection, and distributed optical fiber sensing. [0004] Researchers have developed a variety of perturbation methods to use semiconductor lasers to g...

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Problems solved by technology

[0008] The main purpose of the present invention is to provide a semiconductor chaotic laser with integrated double feedback, so as to solve the technical problems of the current chaotic laser generating device, such as large volume, easy to be affected by the environment, and unstable output.

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