Study of near-infrared dispersion wave generation for microstructured fiber

Abstract

Properties of nonlinear microstructured fiber fabricated in our laboratory are theoretically analyzed using the finite element method. This fiber has a high nonlinearity and phase matching for the dispersion wave generation. To achieve all-fiber nonlinearity in microstructured fiber, the dependence of dispersion wave on the pump power is investigated. When changing the pump power at 1032 nm with a femtosecond fiber laser, the near-infrared dispersion waves cover a region from 753 to 789 nm. The central wavelength and bandwidths alter obviously, and the fiber length has a remarkable impact on pulse broadening and frequency spectrum. Results coincide with the analyses. These results could be a reference for all-fiber nonlinearity of microstructured fiber, and lay a foundation for biological and medical applications, especially some researches on the near-infrared source for nonlinear light microscopy.

Broadband tunable Raman soliton self-frequency shift to mid-infrared band in a highly birefringent microstructure fiber

“…Pulsed-laser sources in mid-infrared (MIR, λ > 2 µm) bands [1][2][3][4] with high peak powers and repetition rates are promising for a broad range of applications, such as IR spectroscopy, biophotonics, polymer chemistry, etc., [5][6][7] since many molecular transitions locate in this range. Microstructure fiber (MF) is a kind of optical fiber whose zero dispersion wavelength λ ZDW [8][9][10][11] can be wide-band adjusted, even to the visible region.…”