Stimulated Raman scattering in hollow core photonic crystal fibres

Abstract

We present an experimental demonstration of stimulated Raman scattering in a hollow core photonic crystal fibre filled with ethanol. By combining the original transmission properties of these fibres with a highly nonlinear liquid we have realized a very efficient Raman generator. This technique can be applied to other nonlinear mechanisms and opens the way towards the realisation of new fibered components for optical systems.

Characterization of self-phase modulation in liquid filled hollow core photonic band gap fibers: erratum

“…The fiber is fixed in tanks closed by BK7 windows and all the fiber holes are totally filled using a process described in [15]. The average powers of the input and output beams are measured before and after the microscope objectives, respectively, using a power meter.…”

Spontaneous four-wave mixing in liquid-core fibers: towards fibered Raman-free correlated photon sources

“…This choice was guided by a number of previously reported investigations: first, dealing with the linear properties of such liquid-core PCFs and showing that the transmission spectral band and the zero-dispersion wavelength do not only depend on the microstructuring geometry of the fiber, but also on the linear refractive index of the filling liquid [29]; and second addressing their nonlinear properties, focusing on two main aspects: 1) The self-phase modulation process [2] has been exploited to measure the nonlinear refractive indices of liquids [30,31], and 2) The stimulated Raman scattering process has been extensively studied [32][33][34][35], leading to the development of efficient single-mode Raman converters with high spectral flexibility. These converters take advantage of both the special Raman properties of liquids (particularly their usual thin-line Raman spectra, with typical widths in the tens of GHz range, i.e., two to three orders of magnitude thinner than the 7-THz-FWHM Raman spectrum of silica) and the flexibility of the liquid-core fiber architecture in terms of transmission band positioning (see [32][33][34][35] for more details). Our point is that these two features can be also exploited to drastically reduce the SpRS noise in fibered sources of correlated photon pairs: by adequately choosing the microstructuring geometry of the hollow-core PCF, the linear refractive index of the liquid, and the pump wavelength, it becomes possible to generate the photon pairs outside the thin Raman lines of the liquid (which is not possible with the broad continua of the Raman spectra in glass materials).…”

Characterization of self-phase modulation in liquid filled hollow core photonic bandgap fibers

“…Beyond our first Raman experiments [8,9,15,16], we provide a complete characterization of the Kerr effect in a liquid filled HC-PCF with a self-phase modulation experiment. This study is the basis for future experiments on the Kerr effect such as soliton production, continuum generation, or parametric generation through four wave mixing.…”