Generation of broadband chaos with perfect time delay signature suppression by using self-phase-modulated feedback and a microsphere resonator

被引：58
作者：
Jiang, Ning [1 ]
Zhao, Anke [1 ]
Liu, Shiqin [1 ]
Xue, Chenpeng [1 ]
Wang, Boyang [1 ]
Qiu, Kun [1 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Informat & Commun Engn, Chengdu 611731, Sichuan, Peoples R China
来源：
OPTICS LETTERS | 2018年 / 43卷 / 21期
基金：
中国国家自然科学基金;
关键词：
SEMICONDUCTOR-LASER; OPTICAL FEEDBACK; OUTPUT; DIODE; COMMUNICATION; LENS;
D O I：
10.1364/OL.43.005359
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose and experimentally demonstrate a broadband chaos generation scheme by introducing self-phase modulation (SPM) in the feedback loop of an external-cavity semiconductor laser and propagating the chaos through a microsphere resonator (MR). Four chaos generation cases-conventional optical feedback (COF), COF + MR, individual SPM optical feedback (SPMOF), and the proposed SPMOF MR-are experimentally discussed. The experimental results demonstrate that with respect to the other three cases, in the proposed scheme with the joint effects of SPMOF and MR, the relaxation oscillation effect in chaos can be eliminated and a flat RF spectrum with much more significant bandwidth enhancement can be achieved. Simultaneously, the time delay signature (TDS) in the chaos can be perfectly suppressed at a very low level close to 0 in a wide operation range of feedback. This work shows a novel scheme to generate broadband chaos with flat spectrum and perfect TDS suppression. (C) 2018 Optical Society of America
引用
收藏
页码：5359 / 5362
页数：4
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