000267490 001__ 267490
000267490 005__ 20190709101407.0
000267490 0247_ $$a10.5075/epfl-thesis-9109$$2doi
000267490 037__ $$aTHESIS
000267490 041__ $$aeng
000267490 088__ $$a9109
000267490 245__ $$aPhysics of Dissipative Kerr Solitons in Optical Microresonators and Application to Low-noise Frequency Synthesis
000267490 260__ $$bEPFL$$aLausanne$$c2019
000267490 269__ $$a2019
000267490 300__ $$a248
000267490 336__ $$aTheses
000267490 502__ $$aProf. Camille Sophie Brès (présidente) ; Prof. Tobias Kippenberg (directeur de thèse) ; Prof. Luc Thévenaz, Prof. Kerry Vahala, Dr Scott Papp (rapporteurs)
000267490 520__ $$aOptical-frequency combs, that is spectra of equidistant coherent optical lines, have revolutionized the precision measurements of time and frequency.
In 2007 a new method to generate optical frequency combs was discovered. In contrast to conventional generation methods based on pulsed laser sources, these `Kerr combs' or `microcombs' are generated entirely via nonlinear frequency conversion in a microresonator pumped by a continuous-wave laser.
More recently, the discovery of dissipative soliton formation in these cavities has enabled the generation of low-noise comb states with reproducible spectral envelopes, required in applications.
Solitons are pulses of light which retain their shape as they circulate in the resonator, owing to the balance between counter-acting effects. On the one hand, the tendency of the pulse to spread due to anomalous group velocity dispersion is counteracted by the nonlinear self-phase modulation. On the other hand, the losses in the cavity are lifted by the nonlinear parametric gain provided by the driving laser. These states are robust attractors of the nonlinear cavity system under specific driving conditions.
In this thesis, the properties and dynamics of dissipative soliton states are studied experimentally in crystalline magnesium fluoride whispering gallery mode resonators. Several methods are developed to accurately determine and control the driving parameters as well as to improve the comb stability.
The observations provide an accurate verification of the Lugiato-Lefever equation commonly used to describe the system.
Furthermore, unexpected deviations from this canonical model are observed and accounted for with an enriched framework.
The improved fundamental understanding and control of the system is applied for the generation of an ultralow-noise microcomb driven with an ultra-stable laser. In combination with a novel transfer oscillator method, this comb is used to synthesize ultralow-noise microwaves via optical frequency division. 
Lastly, a novel method for synthesizing multiple distinct frequency combs from a single resonator and with a single laser is devised. It relies on multiplexing solitons in different spatial modes of the microresonator. Up to three combs are generated simultaneously from a single device for the first time.
000267490 592__ $$b2019
000267490 6531_ $$aOptical frequency combs
000267490 6531_ $$aOptical microresonators
000267490 6531_ $$aNonlinear optics
000267490 6531_ $$aFrequency metrology
000267490 6531_ $$aDissipative Kerr-cavity solitons
000267490 6531_ $$aLow-noise microwave synthesis
000267490 6531_ $$aDual / triple-comb generation
000267490 700__ $$aLucas, Erwan Guillaume Albert$$g222494
000267490 720_2 $$aKippenberg, Tobias$$edir.$$g182444
000267490 8564_ $$uhttps://infoscience.epfl.ch/record/267490/files/EPFL_TH9109.pdf$$s47636899
000267490 909C0 $$pLPQM1
000267490 909CO $$ooai:infoscience.epfl.ch:267490$$pDOI$$pthesis
000267490 918__ $$aSB$$cIPHYS$$dEDPO
000267490 919__ $$aLPQM1
000267490 920__ $$a2019-06-28$$b2019
000267490 970__ $$a9109/THESES
000267490 973__ $$sPUBLISHED$$aEPFL
000267490 980__ $$aTHESIS