Microcombs for ultrafast optical interferometry
Doktorsavhandling, 2023
In this thesis, linear interferometry techniques using frequency combs are analyzed, particularly the dual-comb configuration. By using two-frequency combs, this technique enables the optical sampling of a device under test with high resolution and short measurement times. The interest for implementing this technique using microcombs has attracted a high interest, however, its realization is still challenging.
This work studies the dynamics of microcomb generation and their impact on its spectral properties. As a result, it is proposed different methods to stabilize their output which has allowed us to implement dual-comb interferometry for the first time using platicon microcombs. Additionally, a method to tune a microcomb is proposed, potentially overcoming the limitation imposed by sparse spectral sampling, primarily determined by the comb spacing.
Furthermore, the dynamics of spectral broadening are investigated, resulting in the generation of coherent octave-spanning spectra using ultra-low loss nano-photonic waveguides. Overall, the results of this thesis underline the capacity of chip-scale frequency combs to offer extensive spectral coverage, high resolution, sensitivity, and rapid measurement times in optical interferometry.
nonlinear optics
integrated photonics
microcombs
supercontinuum generation
Författare
Israel Rebolledo Salgado
Chalmers, Mikroteknologi och nanovetenskap, Fotonik
Thermal-Controlled Scanning of a Bright Soliton in a Photonic Molecule
2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023,;(2023)
Paper i proceeding
Platicon dynamics in photonic molecules
Communications Physics,;Vol. 6(2023)
Artikel i vetenskaplig tidskrift
Coherent supercontinuum generation in all-normal dispersion Si<inf>3</inf>N<inf>4</inf> waveguides
Optics Express,;Vol. 30(2022)p. 8641-8651
Artikel i vetenskaplig tidskrift
Marcello Girardi, Óskar B. Helgason, Carmen H. López Ortega, Israel Rebolledo-Salgado, Victor Torres-Company, Superefficient microcombs at the wafer level
Active feedback stabilization of super-efficient microcombs in photonic molecules
Optics Letters,;Vol. 49(2024)p. 2325-2328
Artikel i vetenskaplig tidskrift
This thesis focuses on the analysis of interferometric techniques using optical frequency combs, particularly using a dual-comb configuration. This configuration uses two frequency combs to measure an optical spectrum and down-convert it to the radiofrequency domain where it can be measured with current electronic devices. The publications in this thesis study the challenges of performing dual-comb interferometry using frequency combs at the chip scale. With that purpose, several methods are proposed that can enhance its performance in terms of stability, precision, and accuracy.
Dark-Soliton Engineering in Microresonator Frequency Combs (DarkComb)
Europeiska kommissionen (EU) (EC/H2020/771410), 2018-05-01 -- 2023-04-30.
Flerdimensionell koherentkommunikation med mikrofrekvenskammar
Vetenskapsrådet (VR) (2020-00453), 2020-12-01 -- 2026-11-30.
Styrkeområden
Nanovetenskap och nanoteknik
Ämneskategorier
Atom- och molekylfysik och optik
Annan fysik
Annan elektroteknik och elektronik
Infrastruktur
Nanotekniklaboratoriet
ISBN
978-91-7905-958-3
Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie: 5424
Utgivare
Chalmers
Room A423 (Kollektorn) at the Department of Microtechnology and Nanoscience (MC2)
Opponent: Prof. Delphine Marris-Morini, Centre for Nanoscience and Nanotechnology, Université Paris Saclay, France