Polarization modulation instability in photonic crystal fibers

Abstract

Polarization modulation instability (PMI) in birefringent photonic crystal fibers has been observed in the normal dispersion regime with a frequency shift of 64 THz between the generated frequencies and the pump frequency. The generated sidebands are orthogonally polarized to the pump. From the observed PMI frequency shift and the measured dispersion, we determined the phase birefringence to be 5.3 x 10(-5) at a pump wavelength of 647.1 nm. This birefringence was used to estimate the PMI gain as a function of pump wavelength. Four-wave mixing experiments in both the normal and the anomalous dispersion regimes generated PMI frequency shifts that show good agreement with the predicted values over a 70 THz range. These results could lead to amplifiers and oscillators based on PMI.

Nonlinear polarization effects in optical fibers: polarization attraction and modulation instability [Invited]

“…Polarization modulation instability has been also observed in birefringent photonic crystal fibers (PCF) in the normal dispersion regime [116]. Figure 10 shows the spectrum of light on the slow [ Fig.…”

RGB generation by four-wave mixing in small-core holey fibers

“…Moreover, it was also confirmed that the red and blue sidebands were polarized orthogonally to the green pump, as expected for FWM with birefringent phase matching. 10,11 Finally, the sidebands satisfy the FWM energy conservation condition…”

Cross-Phase Modulation Instability in Mode-Locked Laser Based on Reduced Graphene Oxide

“…MI in optical fiber has drawn considerable attentions for potential applications in ultra-short lasers with high repetition rate, optical parametric amplifiers and all optical logic devices [4][5][6][7][8][9], where sidebands grow exponentially as the energy exchanges between the pumping wavelength and MI gain [7]. Physically, it can be interpreted as degenerate four wave mixing (DFWM), in which two pump photons (ω P ) with the same frequency are annihilated and two symmetrical new photons at Stokes frequency (ω S ) and anti-Stokes frequency (ω AS ) are created simultaneously.…”

“…However, due to the relative weak nonlinearity, MI in conventional fiber often requires high pump peak power [3,6,7]. To decrease the MI threshold, researchers have focused on MI in fibers with periodical variations of dispersion or nonlinearity [11][12][13][14], and MI in fiber resonators, where parametric gain is increased due to accumulated nonlinearity experienced by pulses circulating in laser cavity [15][16][17].…”