Soliton self-frequency shift and third-harmonic generation in a four-hole As_2S_5 microstructured optical fiber

Abstract

Soliton self-frequency shift (SSFS) and third-harmonic generation (THG) are observed in a four-hole As2S5 chalcogenide microstructured optical fiber (MOF). The As2S5 MOF is tapered to offer an ideal environment for SSFS. After tapering, the zero-dispersion wavelength (ZDW) shifts from 2.02 to 1.61 μm, and the rate of SSFS can be enhanced by increasing the energy density of the pulse. By varying the average input power from 220 to 340 mW, SSFS of a soliton central wavelength from 2.206 to 2.600 μm in the mid-infrared is observed in the tapered segment, and THG at 632 nm is observed in the untapered segment.

Chalcogenide suspended-core fibers for supercontinuum generation in the mid-infrared

“…11 Soliton self-frequency shift and third-harmonic generation has been observed in a four-hole tapered As 2 S 5 SCF with ZDW at 1.61 μm pumped by 1.55 μm pulsed laser. 12 Fourth order cascaded Raman wavelength shifting from 2092 nm to 2450 nm was demonstrated in a low loss As 38 Se 62 SCF with ZDW of 3.15 μm pumped by 1995 nm Tm-doped gain switched laser. 13 A mid-IR SC spanning from 1 to 4 μm has been experimentally demonstrated in As 2 S 3 SCF with ZDW of 1660 nm pumped by an OPO laser with tunable wavelength from 1.7 μm to 2.6 μm.…”

“…Besides, low loss, high air-filling fraction, and ultra low mode field diameter have attracted designers to exploit the SCFs for different nonlinear applications. The most important applications of chalcogenide SCFs at present are wavelength conversion [11][12][13] and SC generation. 14, 15 Wavelength conversion from 2 μm to 4.5 μm has been observed in As 2 S 5 SCF with ZDW at 2 μm by degenerate four-wave mixing.…”

Mid-infrared fiber optical parametric oscillator using a three- hole suspended-core chalcogenide fiber

“…Figure 1(a) shows the dispersion curve for the bulk chalcogenide glass and the SCF whose crosssection structure is shown in the inset of Figure 1(a). The dispersion curve is calculated using the material refractive index of As2S5 in [4]. Tuning the core diameter while the width of the bridge is fixed as 0.6 μm, one can find that the ZDW of the SCF will moves to shorter wavelength as the core diameter reduces.…”

Dispersion Engineering of Highly Nonlinear Chalcogenide Suspended-Core Fibers

“…Besides, low loss, high air-filling fraction, and ultra low mode field diameter have attracted designers to exploit SCFs for different nonlinear applications. The most important ones for chalcogenide-made fibers at present are wavelength conversion [11], [12] and SC generation [13], [14]. Recently soliton self-frequency shift and third-harmonic generation has been measured in a four-hole tapered As 2 S 5 SCF with ZDW at 1.61 m, pumped by 1.55 m pulsed laser [11].…”