Carbon chloride-core fibers for soliton mediated supercontinuum generation

Abstract

We report on soliton-fission mediated infrared supercontinuum generation in liquid-core step-index fibers using highly transparent carbon chlorides (CCl, CCl). By developing models for the refractive index dispersions and nonlinear response functions, dispersion engineering and pumping with an ultrafast thulium fiber laser (300 fs) at 1.92 μm, distinct soliton fission and dispersive wave generation was observed, particularly in the case of tetrachloroethylene (CCl). The measured results match simulations of both the generalized and a hybrid nonlinear Schrödinger equation, with the latter resembling the characteristics of non-instantaneous medium via a static potential term and representing a simulation tool with substantially reduced complexity. We show that CCl has the potential for observing non-instantaneous soliton dynamics along meters of liquid-core fiber opening a feasible route for directly observing hybrid soliton dynamics.

Temporal and polarization dependence of the nonlinear optical response of solvents

“…For example, for CS 2 , the response functions determined from our BD measurements in [20,25] have successfully predicted the pulse-width dependence of n 2,eff measured from Z-scan [20,29], as well as the results from other experiments, including degenerate four-wave mixing (DFWM) [20] and optical limiting [30]. In a recent study, our NLO response functions have also been used to interpret the results of mid-infrared supercontinuum generation from CS 2 -core optical fibers, which helps us understand new hybrid soliton dynamics as a result of the noninstantaneous NLR of CS 2 [31,32]. Recently, seven solvents (also included in this work) were studied along with CS 2 using nonlinear ellipse rotation (NER) experiments [33,34] for a range of pulse widths, from which predictions of n 2,eff are given using an empirical model [29].…”

Thermodynamic control of soliton dynamics in liquid-core fibers

“…3). As the ultrafast pump source, we combined a customized thuliumdoped fiber laser (25 MHz, 1.92 μm, 500 fs) with a dispersionmanaged fiber amplifier, as reported earlier [43]. The initial seed pulses are pre-chirped and subsequently amplified based on a nonlinear amplification scheme, which leads to a slight compression.…”

Long-term stable supercontinuum generation and watt-level transmission in liquid-core optical fibers

“…Recently, SCG in CS2-based LCFs in the AD regime suggests the generation of supercontinua (SC) with extraordinary high degrees of coherence at high soliton numbers due to a noninstantaneous phase contribution [19,20]. Moreover, carbon-chlorides are being investigated as future materials [21], too. The non-solid nature of the core suggests a high susceptibility of LCFs to high average input powers, i.e., high thermal loads, defining a demand for studying the long term stability and the power transmission capabilities of LCFs.…”