Optical microcavity integrated broadband chaotic laser

Abstract

The invention discloses an optical microcavity integrated broadband chaotic laser, which is specifically as follows: one end of an arc-shaped hexagonal laser is connected with one end of a deformationmicrocavity through a passive waveguide II, the other end of the deformation microcavity is connected with a passive feedback waveguide, a high-reflection film is plated on an end face of the passivefeedback waveguide, and the other end of the arc-shaped hexagonal laser is connected with a passive waveguide I; with respect to the output light of the arc-shaped hexagonal laser, a part of the light is reflected from the passive waveguide II to the deformation microcavity after the total reflection in the deformation microcavity, after the other part of light enters the passive feedback waveguide, the high-reflection film feeds back the light into the deformation microcavity, the light is also reflected from the passive waveguide II to the deformation microcavity after passing through an intracavity ray rail, the two paths of light are coupled to enter the arc-shaped hexagonal laser together, and the finally generated chaotic laser is output by the passive waveguide I on the other end of the arc-shaped hexagonal laser in a directional coupling manner. The optical microcavity integrated broadband chaotic laser disclosed by the invention has a wide bandwidth, a flat spectrum and a small structure, and can completely eliminate the delay characteristic.

Description

Technical field [0001] The invention relates to the technical field of photonic integrated chaotic semiconductor lasers, in particular to an optical microcavity integrated broadband chaotic laser. Background technique [0002] The chaotic laser is a new and important scientific research tool with a wide range of applications. As a special output form of laser, chaotic laser has the characteristics of random and broad spectrum. Research in the past decade has shown that chaotic lasers have shown important values ​​in the fields of chaotic synchronization and secure optical communication, high-speed random number key generation, lidar, optical fiber network fault detection, ultra-wideband technology, and distributed optical fiber sensing. Semiconductor lasers have become the most important device for generating chaotic lasers because of their small size, light weight, high conversion efficiency, long life, and easy integration. [0003] There are optical feedback methods, optical i...

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Problems solved by technology

[0005] However, the above photon-integrated chaotic semiconductor lasers all adopt the DFB laser delayed optical feedback structure, and the generated chaotic laser has obvious time-delay characteristic information, that is, the chaotic signal has a certain periodicity

In addition, affected by the relaxation oscillation of the laser, the energy of the chaotic signal generated by the optical feedback semiconductor laser is mainly concentrated near the relaxation oscillation frequency in the frequency domain, resulting in uneven spectrum, severe low-frequency suppression, and narrow bandwidth, which is not conducive to practical applications.

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