Microwave Frequency Comb Generation by Gain-Switching Versus Relaxation Oscillations

被引：11

作者：

Islam, Md Shariful ^{[1
,2
]}

Kovalev, A., V ^{[3
]}

Viktorov, E. A. ^{[3
]}

Citrin, D. S. ^{[1
,2
]}

Locquet, A. ^{[1
,2
]}

机构：

[1] Georgia Tech Lorraine, Georgia Tech CNRS IRL 2958, F-57070 Metz, France

[2] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA

[3] ITMO Univ, Fac Laser Photon & Optoelect, St Petersburg 199034, Russia

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2021年 / 33卷 / 10期

关键词：

Semiconductor laser; optoelectronic feedback; optical pulses; microwave combs; self-modulation; gain-switching; microwave photonics; PICOSECOND PULSE GENERATION; SEMICONDUCTOR-LASER SUBJECT; INJECTION;

D O I：

10.1109/LPT.2021.3068327

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Optoelectronic feedback on a laser diode is demonstrated to generate two distinct modes of periodic pulse-train formation depending on the injection current J of the laser leading to microwave combs in two distinct regimes. For J close to the threshold current Jth, the pulse repetition rate f(rep) is the inverse of the loop delay. This behavior is attributed to feedback-induced gain-switching and leads to comb spacings in the tens of MHz range. In contrast, for J similar or equal to 2 Jth, the repetition rate f(rep) is observed to be related to the relaxation-oscillation frequency f(RO). The potential to generate pulse trains and associated microwave combs may find use in metrology, optical communications, optical sampling, and spectroscopy.

引用

页码：491 / 494

页数：4

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