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Low propagation loss in high confinement waveguides is critical for chip‐based nonlinear photonics applications. Sophisticated fabrication processes which yield sub‐nm roughness are generally needed to reduce scattering points at the waveguide interfaces to achieve ultralow propagation loss. Here, ultralow propagation loss is shown by shaping the mode using a highly multimode structure to reduce its...
We show that soliton-modelocked silicon nitride microresonators are highly stable against external perturbations. Modelocking is maintained even for relatively large RMS pump-power noise and thermal shifts, which represents a key feature for potential applications.
We report the first demonstration of thermally-controlled single-soliton modelocking in silicon-nitride microresonators. With the pump frequency fixed, we use only current control with on-chip integrated heaters to demonstrate a systematic pathway for achieving single-soliton modelocking.
We investigate theoretically and experimentally the dynamics of frequency comb formation triggered by mode-crossings in a normal group-velocity dispersion microresonator. We demonstrate that phase-matching conditions can predict the spectral features of the resulting combs.
We present the first observations of breather solitons in microresonators. Our results provide a new perspective on the evolution towards stable soliton formation in microresonator frequency combs.
We resolve in real-time the dynamics of bound states of temporal cavity solitons in a passive driven nonlinear resonator, and identify several new binding mechanisms involving Gordon/Kelly sidebands, birefringence, and dispersive waves.
We use spectral interferometry to experimentally measure the degree of coherence across the full bandwidth of microresonator-based frequency combs. Our results show distinct coherence characteristics for two different frequency combs, supporting previous theoretical findings.
We will present our latest experiments with temporal cavity solitons, including writing/erasing, temporal tweezing, merging, annihilation, and spontaneous excitation. We will also highlight their relevance in the context of microresonator Kerr frequency combs.
We report experimental observations of weaklybound states of temporal cavity solitons, with separations of 10 soliton widths and beyond, in a 100-m single mode fiber cavity. Bound state dynamics has been studied using the real time dispersive Fourier transform technique for roundtrip-byroundtrip measurements. Temporal oscillations in the cavity soliton background, associated with the presence of Kelly...
We experimentally demonstrate temporal tweezing of picosecond optical pulses, extending the concept of optical tweezers to the time-domain. By adjusting the phase profile of the driving beam, we can trap and manipulate temporal cavity solitons.
We demonstrate time-domain optical soliton tweezers: the trapping and real-time manipulation of a sequence of picosecond optical solitons. By adjusting the phase profile of the driving beam, we induce controlled timedomain motion of temporal cavity solitons.
We report the first experimental observation of dispersive wave emission by temporal cavity solitons. Our results could impact on a variety of systems supporting temporal cavity solitons, such as high-Q Kerr microresonators.
Solitons are ubiquitous in nonlinear optics and are well known to radiate away energy when perturbed. This radiation is commonly called a dispersive wave (DW) because it spreads temporally due to chromatic dispersion [1]. It can also be interpreted as Čerenkov radiation. A classic example is DW emission by Kerr optical fiber solitons in presence of high-order dispersion. This case has important applications...
Solitons are ubiquitous nonlinear waves that manifest themselves across a plethora of physical systems. They are known to interact in a variety of ways, elastically or inelastically. Despite the vast number of systems supporting solitons, the past two decades have shown optics to constitute the platform of choice for the systematic study of their interactions [1]. Soliton interactions can be either...
Temporal cavity solitons (CS) are optical pulses that circulate indefinitely around a coherently-driven nonlinear passive optical cavity [1]. They are genuine solitons in the sense that chromatic dispersion is balanced by nonlinearity. In addition, a continuous-wave (cw) driving beam compensates for the intracavity losses. This double-balancing justifies classifying these objects as dissipative solitons...
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