Coherent supercontinuum generation in all-normal dispersion Si3N4 waveguides
Journal article, 2022

Spectral broadening of optical frequency combs with high repetition rate is of significant interest in optical communications, radio-frequency photonics and spectroscopy. Silicon nitride waveguides (Si3N4) in the anomalous dispersion region have shown efficient supercontinuum generation spanning an octave-bandwidth. However, the broadening mechanism in this regime is usually attained with femtosecond pulses in order to maintain the coherence. Supercontinuum generation in the normal dispersion regime is more prone to longer (ps) pulses, but the implementation in normal dispersion silicon nitride waveguides is challenging as it possesses strong requirements in propagation length and losses. Here, we experimentally demonstrate the use of a Si3N4 waveguide to perform coherent spectral broadening using pulses in the picosecond regime with high repetition rate. Moreover, our work explores the formation of optical wave breaking using a higher energy pulse which enables the generation of a coherent octave spanning spectrum. These results offer a new prospect for coherent broadening using long duration pulses and replacing bulky optical components.

Author

Israel Rebolledo Salgado

RISE Research Institutes of Sweden

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Zhichao Ye

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Simon Christensen

Technical University of Denmark (DTU)

Fuchuan Lei

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Krishna Sundar Twayana

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Jochen Schröder

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

M. Zelan

RISE Research Institutes of Sweden

Victor Torres Company

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Optics Express

1094-4087 (ISSN)

Vol. 30 6 8641-8651

Multidimensional coherent communications with microcombs

Swedish Research Council (VR) (2020-00453), 2020-12-01 -- 2026-11-30.

Dark-Soliton Engineering in Microresonator Frequency Combs (DarkComb)

European Commission (EC) (EC/H2020/771410), 2018-05-01 -- 2023-04-30.

Subject Categories

Accelerator Physics and Instrumentation

Atom and Molecular Physics and Optics

Other Physics Topics

DOI

10.1364/OE.450987

PubMed

35299311

More information

Latest update

3/18/2022