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Monolithic integrated laser chip for chaotic light generation by highly scattering doped optical waveguide feedback

A single-chip integration and optical waveguide technology, which is applied in the direction of semiconductor lasers, lasers, phonon exciters, etc., can solve the problems of low coupling efficiency and achieve the effects of enhanced randomness, compact structure, and strong integration

Active Publication Date: 2019-12-13
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0008] However, the above-mentioned chaotic semiconductor laser chip adopts hybrid integration, and there are still problems such as low coupling efficiency, while the coupling efficiency of monolithic integrated chaotic sources is higher, which is the next goal of the development of photonic integrated chaotic sources

Method used

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  • Monolithic integrated laser chip for chaotic light generation by highly scattering doped optical waveguide feedback
  • Monolithic integrated laser chip for chaotic light generation by highly scattering doped optical waveguide feedback

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Embodiment Construction

[0020] see figure 1 As shown, the present invention provides a monolithic integrated laser chip that generates chaotic light with high scattering doped optical waveguide feedback, and the chip includes a DFB laser structure, a non-doped optical waveguide structure and a high scattering doped optical waveguide structure, wherein the DFB laser The structure and the high-scattering doped optical waveguide structure are respectively distributed at both ends of the non-doped optical waveguide structure.

[0021] like figure 2 Shown, each part structure of the present invention comprises:

[0022] a substrate 02;

[0023] A confinement layer 03, which is fabricated on the substrate 02;

[0024] An active layer 05, which is fabricated on the lower confinement layer 03;

[0025] An upper confinement layer 06, which is fabricated on the active layer 05;

[0026] A waveguide layer 04, which is strip-shaped, is longitudinally fabricated in the middle of the upper confinement layer ...

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Abstract

A monolithically integrated laser chip for generating chaotic lasers by a high-scattering doped optical waveguide includes: a DFB laser structure A; a high-scattering doped optical waveguide structureC; and a non-doped optical waveguide structure B which connects A and C. The chip generates chaotic lasers by the random feedback of the high-scattering doped optical waveguide, eliminates the delaycharacteristic of a chaotic laser device, uses a monolithic integrated structure, and is compact in structure and good in stability.

Description

technical field [0001] The invention relates to the field of semiconductor optoelectronics, in particular to a monolithic integrated laser chip for generating chaotic light by feedback from a highly scattered doped optical waveguide. Background technique [0002] Chaotic signals have the advantages of good randomness, wide spectrum, extremely limited predictability, etc., and are easy to generate and control, and have attracted great attention in the field of broadband and ultra-wideband. High-quality chaotic optical signals have important applications in physical random number generation, lidar and time-domain reflectometers, and applications in communication, sensing, and information security are gradually becoming practical. [0003] High-quality chaotic signals can be generated by semiconductor lasers under the conditions of optical feedback, optoelectronic feedback and optical injection. This kind of chaotic signal has the advantages of physical randomness, long-term u...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/12H01S5/34
CPCH01S5/1203H01S5/34
Inventor 乔丽君张明江孟洁张建忠刘毅赵彤王安帮王云才
Owner TAIYUAN UNIV OF TECH