Yanne K. Chembo

Spatiotemporal Lugiato-Lefever formalism for Kerr-comb generation in whispering-gallery-mode resonators

We demonstrate that frequency (Kerr) comb generation in whispering-gallery-mode resonators can be modeled by a variant of the Lugiato-Lefever equation that includes higher-order dispersion and nonlinearity. This spatiotemporal model allows us to explore pulse formation in which a large number of modes interact cooperatively. Pulse formation is shown to play a critical role in comb generation, and we find conditions under which single pulses (dissipative solitons) and multiple pulses (rolls) form. We show that a broadband comb is the spectral signature of a dissipative soliton, and we also show that these solitons can be obtained by using a weak anomalous dispersion and subcritical pumping.

Compact optoelectronic microwave oscillators using ultra-high Q whispering gallery mode disk-resonators and phase modulation

We demonstrate a compact optoelectronic oscillator based on phase modulation and ultra-high Q disk resonators. A 10.7 GHz microwave is generated, with a phase noise of -90 dBrad2/Hz at 10 kHz from the carrier, and -110 dBrad2/Hz at 100 kHz.

Optical Rogue Waves in Whispering-Gallery-Mode Resonators

Tampere University of Technology, Institute of Physics,Optics Laboratory, FIN-33101 Tampere, Finland(Dated: January 7, 2014)We report a theoretical study showing that rogue waves can emerge in whispering gallery moderesonators as the result of the chaotic interplay between Kerr nonlinearity and anomalous group-velocity dispersion. The nonlinear dynamics of the propagation of light in a whispering gallery-moderesonator is investigated using the Lugiato-Lefever equation, and we evidence a range of parameterswhere rare and extreme events associated with a non-gaussian statistics of the eld maxima areobserved.

Barium fluoride whispering-gallery-mode disk-resonator with one billion quality-factor

We demonstrate a monolithic optical whispering-gallery-mode resonator fabricated with barium fluoride (BaF₂) with an ultra-high quality (Q) factor above 10⁹ at 1550 nm, and measured with both the linewidth and cavity-ring-down methods. Vertical scanning optical profilometry shows that the root mean square surface roughness of 2 nm is achieved for our mm-size disk. To the best of our knowledge, we show for the first time that one billion Q-factor is achievable by precision polishing in relatively soft crystals with mohs hardness of 3. We show that complex thermo-optical dynamics can take place in these resonators. Beside usual applications in nonlinear optics and microwave photonics, high-energy particle scintillation detection utilizing monolithic BaF₂ resonators potentially becomes feasible.

Cascaded Brillouin lasing in monolithic barium fluoride whispering gallery mode resonators

We report the observation of stimulated Brillouin scattering and lasing at 1550~nm in barium fluoride (BaF

On the dispersion management of fluorite whispering-gallery mode resonators for Kerr optical frequency comb generation in the telecom and mid-infrared range

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On the robustness of phase locking in Kerr optical frequency combs

) crystal. Brillouin lasing was achieved with ultra-high quality (

Kerr optical frequency comb generation in strontium fluoride whispering-gallery mode resonators with billion quality factor.

Q

Phase noise performance comparison between optoelectronic oscillators based on optical delay lines and whispering gallery mode resonators.

) factor monolithic whispering gallery mode (WGM) mm-size disk resonators. Overmoded resonators were specifically used to provide cavity resonances for both the pump and all Brillouin Stokes waves. Single and multiple Brillouin Stokes radiations with frequency shift ranging from

Estimation of the uncertainty for a phase noise optoelectronic metrology system

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