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Abstract
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In this paper, we report on a supercontinuum generation by amplifying noise-like pulses (NLPs) in a nonlinear
Yb-doped fiber amplifier. The NLP source is a homemade Yb-doped all-fiber ring oscillator based on nonlinear
polarization rotation mode-locking method. NLPs possess a repetition rate of 11.57 MHz, energy of 16.5 nJ, and
3 dB spectral bandwidth of 42 nm. The intensity autocorrelation function of NLPs has a broad pedestal and a
narrow central spike. The pedestal and the spike have temporal widths of 63 ps and 92 fs, respectively. The NLPs
are amplified by a Yb-doped fiber nonlinear power amplifier to achieve output power of 7.5 W. Nonlinear effects
in the amplifier drastically broaden the spectrum of NLPs and generate high-power supercontinuum light with
10 dB spectral bandwidth of 1130 nm (from 1037 to 2167 nm). The presented supercontinuum generation system
is an all-fiber compact structure and has the advantage of not requiring long single-mode, nonlinear, or photonic
crystal fibers.
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