All-normal dispersion supercontinuum generation in photonic crystal fibers with large hollow cores infiltrated with toluene

Hoang V.H., Kasztelanic R., Anuszkiewicz A., Stepniewski G., Filipkowski A., Ertman S., Pysz D., Wolinski T., Xuan K.D., Klimczak M., and Buczynski R.

Optical Materials Express

8(11), 2018, 3568-3582, 10.1364/OME.8.003568

An all-normal dispersion supercontinuum generation in the range of 950 ÷ 1100 nm in photonic crystal fiber with core infiltrated with toluene is reported. The regular lattice hollow core photonic crystal fiber with a large core of 12 μm was designed and developed. The photonic crystal fiber core was selectively filled with toluene. The investigated fiber has normal dispersion in the wavelength range of 0.5 ÷ 2μm, while the absolute value of dispersion varies from 150 to 5 ps/nm/km in the range of 1 ÷ 2µm wavelength. The fiber nonlinear coefficient is 130 W−1km−1 as a result of the trade-off of high nonlinearity of toluene and a large mode area of the fundamental mode. The large mode area is required for the efficient delivery of high power pulses from large mode area input fiber in an all fiber system. As a pump source, a standard subpicosecond fiber laser emitting at 1030 nm with 10nJ pulse energy was used.