Optimized flat supercontinuum generation in high nonlinear fibers pumped by a nanosecond Er/Yb Co-doped fiber amplifier

Abstract

Flat supercontinuum generation has been demonstrated in high nonlinear fibers with zero dispersion wavelengths at 1480 and 1500 nm, which were pumped by a MOPA structured Er/Yb co-doped fiber amplifier based on a modulated nanosecond seed laser with the wavelength of 1552 nm. The spectra and output powers affected by the zero dispersion wavelengths, fiber lengths and pump pulse widths were investigated experimentally. A flat spectrum with 5 dB bandwidth from 1220 nm to beyond 1700 nm (assuming the pump peak was filtered) in the optical spectrum analyzer detectable range was finally obtained by optimizing the fiber length and pump pulse width. The maximum output power was 1.02 W, including the peaks near 1550 nm.

Octave-spanning supercontinuum generation in highly nonlinear silica fibres based on cost-effective fibre amplifiers

“…Moreover, they offer a broad spectrum spanning over several thousand of nanometres with a high spectral power density (>1 mW nm −1 ) in near and medium infrared ranges. These sources usually employ Er and Er/Yb doped fibre pulsed lasers [2] to pump different types of fibres as nonlinear medium: photonic crystal fibres [3][4][5][6] generating up to 2.4 µm, silica highly nonlinear fibres [7][8][9][10][11][12][13] up to 2.7 µm and ZBLAN nonlinear fibres [14][15][16] up to 4.5 µm. Other authors [17][18][19] have reported supercontinuum assisted by thulium-doped fibres generating powers from 2 to 2.5 µm.…”

Broadband supercontinuum generation with femtosecond pulse width in erbium-doped fiber laser (EDFL)

“…The nonlinear characteristics are capable of affecting the dispersive properties of an optical fiber, which consequently modifies the spectrum evolution of the optical pulses. SCG can be attained by launching ultrashort pulses (<1 ns) into a highly nonlinear medium such as tapered fiber [3,4], photonic crystal fiber (PCF) [5][6][7], highly nonlinear fiber (HNLF) [8,9], rare-earth-doped fiber amplifiers [10,11], and single mode fiber [12,13].…”

Flat mid-infrared supercontinuum generation in tapered fiber with thin coating of highly nonlinear glass

“…At the last decade the research community has been focused (for the development of SC sources) on the utilization of highly nonlinear characteristics of conventional silica lightwave mediums such as photonic crystal fibers 1, 2 and highly non linear fibers 3,4 , which their operation are limited by the length of the fiber, the waveguide optical characteristics (e.g. dispersion profile) and the large amount of input power which is necessary in order to turn on the corresponding non linear processes.…”