An Optical Microcavity Integrated Broadband Chaotic Laser

Abstract

The invention discloses an optical microcavity integrated broadband chaotic laser, specifically: one end of the arc-shaped hexagonal laser is connected to one end of a deformed microcavity through a passive waveguide II, the other end of the deformed microcavity is connected to a passive feedback waveguide, and the passive feedback waveguide The end face of the arc-shaped hexagonal laser is coated with a high-reflection film, and the other end of the arc-shaped hexagonal laser is connected to the passive waveguide I; the arc-shaped hexagonal laser outputs light, and part of the light is totally reflected by the deformed microcavity and then reflected from the passive waveguide II. After the light enters the passive feedback waveguide, the high-reflection film feeds the light back into the deformed microcavity. After passing through the ray track in the cavity, it is also reflected from the passive waveguide II to the deformed microcavity. The two paths of light are coupled into the arc-shaped hexagonal laser together, and finally The generated chaotic laser is directional coupled and output by the passive waveguide I at the other end of the arc-shaped hexagonal laser. The invention has wide bandwidth, flat frequency spectrum, compact structure and can completely eliminate time delay characteristics.

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] 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. Research in the past ten years has shown that chaotic lasers have shown important value in the fields of chaotic synchronization and secure optical communication, high-speed random number key generation, laser radar, optical fiber network fault detection, ultra-wideband technology, and distributed optical fiber sensing. Semiconductor lasers have become the most important devices for generating chaotic lasers because of their small size, light weight, high conversion efficiency, long life, and easy integration. [0003] There are optical feedback, optical...

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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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