Three-Octave Supercontinuum Generation Using SiO2 Cladded Si3N4 Slot Waveguide With All-Normal Dispersion

被引：21

作者：

Fang, Yuxi ^{[1
]}

Bao, Changjing ^{[2
]}

Wang, Zhi ^{[1
]}

Liu, Bo ^{[1
]}

Zhang, Lin ^{[3
]}

Han, Xu ^{[1
]}

He, Yuxuan ^{[1
]}

Huang, Hao ^{[2
]}

Ren, Yongxiong ^{[2
]}

Pan, Zhongqi ^{[4
]}

Yue, Yang ^{[1
]}

机构：

[1] Nankai Univ, Inst Modern Opt, Tianjin 300350, Peoples R China

[2] Univ Southern Calif, Dept Elect Engn, Los Angeles, CA 90089 USA

[3] Tianjin Univ, Sch Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China

[4] Univ Louisiana Lafayette, Dept Elect & Comp Engn, Lafayette, LA 70504 USA

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2020年 / 38卷 / 13期

基金：

中国国家自然科学基金;

关键词：

Optical waveguides; Supercontinuum generation; Coherence; Chromatic dispersion; Bandwidth; All-normal dispersion; coherence; silicon photonics; slot waveguide; supercontinuum generation; PHOTONIC CRYSTAL FIBER; FULL VECTORIAL MODEL; MIDINFRARED SUPERCONTINUUM; CONTINUUM GENERATION; PULSE-PROPAGATION; FREQUENCY COMB; MU-M; SILICON; CORE; COMPRESSION;

D O I：

10.1109/JLT.2020.2985262

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：

We investigate a silicon nitride (Si3N4) horizontal slot waveguide with silicon dioxide (SiO2) cladding, which can achieve a flat and low normal dispersion of -15.56 ps/(nm center dot km) over a 3270-nm wavelength range from 1170 to 4440 nm, covering a 1.9 octave bandwidth. By launching a 100-fs 90-kW hyperbolic secant input pump pulse, a three-octave supercontinuum (SC) from 504 to 4229 nm can be generated using a 5-mm long waveguide. The generated SC spectrum is highly coherent, as it is mainly expanded by self-phase modulation (SPM) and optical wave breaking (OWB) in all-normal dispersion regime. The degree of coherence can achieve >0.99 from 1250 to 4300 nm. Therefore, the proposed waveguide could potentially serve as a key element in the on-chip broadband source for silicon photonic platform.

引用

页码：3431 / 3438

页数：8

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