Nonlinear Dynamics in the Supercontinuum Generation Regime

Since their first demonstration in 2000, photonic crystal fibers (PCFs) have been extensively used for the generation of broadband supercontinua in many different contexts. [1] Furthermore, it is well known that synchronously-pumped systems can exhibit a large variety of different nonlinear dynamics, because the fed-back perturbation can intrinsically modify the stability of the whole dynamical system. [2] Here, we combine these two aspects and look at the dynamics of strong spectral broadening in ring cavity configurations, which are synchronously pumped by 100 fs time-bandwidth limited pulses. Period doubling as well as chaotic behaviour can be observed by changing the delay between the pump and the signal circulating inside the cavity. [3] By employing several different types of fibre, including solid- as well as gas-filled hollow core PCF, the system’s key parameters dispersion and nonlinearity can be specifically tailored and their influence investigated. [4] This project involves the development of semi-analytical models, numerical simulations as well as the experimental study of the ring cavity.


  1. P. St.J. Russell, Photonic Crystal Fibers, Science 299, 358 –362 (2003).
  2. I. Kensuke, Multiple-valued stationary state and its instability of the transmitted light by a ring cavity system, Opt. Commun. 30, 257–261 (1979).
  3. M. Schmidberger, W. Chang, P. St.J. Russell and N. Y. Joly, Influence on timing jitter on nonlinear dynamics of a photonic crystal fiber ring cavity, Opt. Lett. 37, 3576-3578 (2012).
  4. M. Schmidberger, W. Chang, F. Biancalana, P. St.J. Russell and N. Y. Joly, Nonlinear dynamics of synchronously pumped photonic crystal fiber ring cavities, in Frontiers in Optics Conference, OSA Technical Digest (online) (Optical Society of America), p. FTh3B.3 (2012).

Figure (a): Sketch of the experimental ring cavity setup. (b) Exemplary simulated temporal and spectral evolution of the cavity pulse under the influence of 140 fs FWHM sech-shaped pump pulses, which are temporally delayed by 25 fs.


Prof. Dr. Nicolas Joly (