Coherent supercontinuum generation in all-normal dispersion Si3N4 waveguides
Artikel i vetenskaplig tidskrift, 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.

Författare

Israel Rebolledo Salgado

RISE Research Institutes of Sweden

Chalmers, Mikroteknologi och nanovetenskap, Fotonik

Zhichao Ye

Chalmers, Mikroteknologi och nanovetenskap, Fotonik

Simon Christensen

Danmarks Tekniske Universitet (DTU)

Fuchuan Lei

Chalmers, Mikroteknologi och nanovetenskap, Fotonik

Krishna Sundar Twayana

Chalmers, Mikroteknologi och nanovetenskap, Fotonik

Jochen Schröder

Chalmers, Mikroteknologi och nanovetenskap, Fotonik

M. Zelan

RISE Research Institutes of Sweden

Victor Torres Company

Chalmers, Mikroteknologi och nanovetenskap, Fotonik

Optics Express

1094-4087 (ISSN)

Vol. 30 6 8641-8651

Flerdimensionell koherentkommunikation med mikrofrekvenskammar

Vetenskapsrådet (VR) (2020-00453), 2020-12-01 -- 2026-11-30.

Dark-Soliton Engineering in Microresonator Frequency Combs (DarkComb)

Europeiska kommissionen (EU) (EC/H2020/771410), 2018-05-01 -- 2023-04-30.

Ämneskategorier

Acceleratorfysik och instrumentering

Atom- och molekylfysik och optik

Annan fysik

DOI

10.1364/OE.450987

PubMed

35299311

Mer information

Senast uppdaterat

2022-03-18