The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Microresonator Kerr frequency combs have the potential to revolutionize many aspects of modem technology (e.g. in precision metrology, spectroscopy, as well as telecommunications). In Kerr cavities, stable, low-noise, optical frequency combs often take the form of temporal cavity solitons (CSs): ultra-short optical pulses that persist in driven nonlinear resonators [1]. Recently, studies of CSs under...
Temporal cavity solitons (CSs) are pulses of light that persist in coherently driven passive resonators [1], and they play a key role in fibre-based all-optical buffers [2] and coherent micro-resonator frequency combs [3]. They are typically explained as steady-state solutions of the mean-field Lugiato-Lefever equation (LLE), and predicted to correspond to unique attracting states. However, the LLE...
Switching waves (SWs) are fronts that connect two homogeneous stable states of a multistable system [1]. An isolated SW typically propagates until the most stable state completely invades the other and can only be stationary at the so-called Maxwell point, where the two states have the same marginal stability. Close to the Maxwell point, it may still be possible however for two SWs to form a stable...
We present a comprehensive review of recent work on numerical modelling of frequency comb generation in coherently-driven nonlinear resonators. Specifically, we discuss modelling and nonlinear dynamics of frequency combs generated in Kerr nonlinear microresonators, emphasizing links to similar dynamics studied in macroscopic fibre cavities. In addition to established Kerr frequency comb generators,...
We experimentally show that the efficiency of dispersive wave generation by a four-wave mixing cascade is strongly affected by pump frequency detuning. Results are explained using both time and frequency domain descriptions.
We show experimentally and theoretically that fiberoptic analogues of event horizons can be explained by cascaded four-wave mixing between two continuous waves. Excellent agreement is obtained between experiments using pulsed and continuous wave lasers.
Temporal cavity solitons are used to implement an all-optical buffer capable of storing 4736 optical bits, written at 10 Gb/s, for over 1 minute with 100% fidelity.
We experimentally show that the pump frequency detuning strongly affects the efficiency of dispersive wave generation by cascaded four-wave mixing. We explain our results in terms of higher-order soliton compression of the input beat signal.
We demonstrate an all-optical data buffer implemented using temporal cavity solitons in a fiber ring. The ring can hold 4736 bits, encoded as cavity solitons, at 10 Gb/s for over one minute with 100% fidelity.
We theoretically and experimentally show that fiber-optic analogues of event horizons can be explained by cascaded four-wave mixing of monochromatic continuous waves. Experiments performed with pulsed and continuous wave lasers are in excellent agreement.
The emission of Cherenkov radiation (CR) by solitons propagating in optical fibers has been extensively studied and is known to play a central role in the generation of broadband supercontinua [1]. This process is generally described in terms of a phase-matching condition between the soliton propagating in the anomalous dispersion regime and a dispersive wave in the region of normal dispersion. Although...
Wavelength conversion via four-wave mixing (FWM) schemes of high-bit rate data formats are conventionally achieved using a strong pump source and a secondary nonlinear device, such as highly nonlinear fibre [1] or semiconductor optical amplifier [2]. In this work we obviate the need for a secondary nonlinear device, and achieve wavelength-conversion of high repetition-rate pulse trains by externally...
Conventionally dispersive wave (DW) emission in nonlinear fiber optics is described in the time-domain as the resonant amplification of a linear wave propagating in-phase with a soliton pump [1]. Recently, however, a complementary frequency-domain description has been presented, which identifies the nonlinear origins of the process as phasematched cascaded four-wave mixing [2]. This new theory predicts...
Nonlinear Bragg scattering, also known as wavelength exchange, is a non-degenerate four-wave-mixing process which has attracted considerable interest as means of noise-free quantum frequency translation [1, 2]. In elementary Bragg scattering two strong pumps at frequencies ω 1 and ω 2 =ω 1 +Δ mediate the sinusoidal exchange of energy between a weak signal at ω0 and an idler at ω1 = ω0 + Δ. The process...
We describe supercontinuum generation using traditional nonlinear optics formalism. We show theoretically, numerically, and experimentally that phase-matched cascaded four-wave mixing constitutes the physical interpretation of soliton-induced Cherenkov radiation and associated spectral recoil.
Device characterizations of QDash semiconductor lasers as a subchannel comb generator are presented, including measurements of electric field, optical linewidth, and mode coherence out to 1.5THz spectral mode separation.
We demonstrate an over sixty-times increase in the Brillouin threshold of a short length fiber ring cavity through careful selection of the fiber length.
We demonstrate how Brillouin scattering can be passively suppressed in meter length fiber ring cavities by carefully setting the fiber length. Experimentally we demonstrate a factor 3.4 increase in Brillouin threshold using this technique.
High average power, wavelength tunable, optical sources have many applications in biophysics, sensing, and telecommunications. In this work we demonstrate a fiber optical parametric oscillator with multi-Watt level output power over a 450 nm tuning range around 1550 nm. The tunability of the oscillator is a result of the wide frequency tunability of phasematched four-wave-mixing possible when pumping...
The ability to shape the spectral amplitude and phase of optical signals is a key requirement in the fields of optical arbitrary waveform generation (O-AWG) and optical communications. To this end much effort has been directed towards developing programmable Fourier-domain optical processors (FDOP) capable of adjusting the amplitude and phase of the individual spectral components of an input optical...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.