Cross-phase modulation instability in photonic crystal fibers

Abstract

We report on the observation of cross-phase modulation instability in a highly nonlinear photonic crystal fiber. In such fibers the presence of higher orders of dispersion results in a complex phase-matching curve. We are able to observe this behavior experimentally and obtain excellent agreement between the measured and predicted shifts.

Nonlinear Optics and Solitons in Photonic Crystal Fibres

“…A solution is offered with the widely spaced FWM phasematching available in the normal dispersion regime of PCF, yielding high count rates and low background [49] compared with previous results for the anomalous regime in PCF or conventional fibres [50,51]. Further rich phasematching is attainable in birefringent fibres through vector modulation instability, with pump, signal and idler fields not necessarily on the same axis of the fibre [48], which has been seen in conventional fibres [52] and in PCF [53]. This has been suggested as a means of reducing raman noise in pair-photon generation [54].…”

CW parametric generation in polarization maintaining PCF pumped by Yb-doped fiber laser

“…It is based on different phase velocities of waves propagated in two polarization modes of a polarization maintaining fiber. Since the high birefringent PCFs with typical birefringence of ~ 10 -4 have been developed the parametric process with polarization phase matching were also observed in such fibers [7][8][9]. Phase matching in polarization maintaining fibers supposed two ways of pump propagation: 1) pump is polarized along one of the axes while Stokes and anti-Stokes waves are polarized along the other one; 2) pump is divided between two axes, Stokes and anti-Stokes waves are also polarized along different axes.…”

“…Phase matching in polarization maintaining fibers supposed two ways of pump propagation: 1) pump is polarized along one of the axes while Stokes and anti-Stokes waves are polarized along the other one; 2) pump is divided between two axes, Stokes and anti-Stokes waves are also polarized along different axes. In references [7,8] the first of the mentioned process is called polarization modulation instability (PMI) process, the second one is called cross-phase modulation instability (XPMI) process. Modulation instability in spectral domain results in appearance a pair of sidebands from the background noise when strong pump wave propagates in nonlinear dispersive medium.…”

Continuous-Wave Band Translation Between the Near-Infrared and Visible Spectral Ranges

“…Andersen et al [14] recently demonstrated a CW conversion of high-power multiple-mode 1493-nm and single-mode 1549-nm signals in the PCF using a tunable Ti:Sapphire pump. The silica PCF platform has reached maturity, with a significant progress made in understanding its guiding properties [12], [15], nonlinear enhancement supporting four-photon mixing (FPM) [14], [20], self-and cross-phase modulations [19] and supercontinuum generation [20], [21]. However, little or no effort has been invested to date [22] in distant modulated signal translation using either silica or nonsilica PCFs.…”