A Dual Feedback Monolithic Integrated Laser Chip

Abstract

The invention relates to the field of semiconductor optoelectronics, in particular to a dual-feedback monolithic integrated laser chip, and aims at solving the technical problems that an existing chaotic laser is large in size, not high enough in integration level, not good enough in chaotic state and the like. The dual-feedback monolithic integrated laser chip comprises a left gain-absorption part, a left phase adjusting part, a DFB laser part, a right phase adjusting part and a right gain-absorption part, which are sequentially arranged from left to right and are coaxial. By an ultrashort dual-cavity structure, a fixed delay of a general single-cavity feedback laser chip is eliminated; feedback is provided by coating the end surface with an anti-permeable membrane; dual feedback cavities are similar in length, but not the same; the time delay characteristic of a single-cavity optical feedback chaotic laser is thoroughly eliminated; the weak periodicity is reduced; and the randomness is improved. According to the monolithic integrated laser chip, the chaotic bandwidth of an integrated device can be improved by dual feedback; the frequency spectrum is relatively flat; and the monolithic integrated laser chip also has the advantages of being light in weight, small in size, high in integrity and the like.

Description

technical field [0001] The invention relates to the field of semiconductor optoelectronics, in particular to a double-feedback monolithic integrated laser chip. 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 laser has shown its important application value in many fields. [0003] (1) Chaotic secure optical communication based on physical layer encryption can be realized: Chaotic optical secure communication is a new type of secure communication technology with chaotic synchronous physical layer encryption, which is suitable for high-speed, long-distance, low bit error rate transmission. The realization of chaotic optical communication in the laid optical fiber link is compatible with the current wavelength division multiplexing system of op...

AI Technical Summary

Problems solved by technology

[0011] The present invention provides a double-feedback single-chip integrated laser chip to solve the technical problems of the current chaotic laser, such as large volume, insufficient integration, and insufficient chaotic state.

Images