Fig. 1. Output spectra evolution of linearly and circularly polarized pulses in nonlinear optical fiber. (a) Linearly polarized pulse; (b) circularly polarized pulse

Fig. 2. Output spectra of input pulses with different polarization states in the same spectral broadening, where solid line represents linearly polarized (LP) pulse and dotted line represents circularly polarized (CP) pulses. (a) Peak frequency of right-side lobe is shifted to 1.2 μm; (b) peak frequency of right-side lobe is shifted to 1.1 μm

Fig. 3. Output spectra. (a) Output spectra of pulses with different polarization states, where solid line represents the angle between vibration plane of linearly polarized light and optical axis of wave plate is 45°, short dotted line represents the angle is 47° (43°), and long dotted line represents the angle is 49° (41°); (b) output spectra of right-handed and left-handed polarization state components

Fig. 4. Experimental setup of high energy, wavelength tunable and ultrafast fiber laser system

Fig. 5. Output spectra of input pulses with different polarization states at different powers, where dotted line demarcates 1200 nm band. (a) Linearly polarized pulse; (b) circularly polarized pulse

Fig. 6. Experimental results of output spectra of input pulses with different polarization states under the same spectral broadening. (a) Peak frequency of right-side lobe shifts to 1100 nm; (b) peak frequency of right-side lobe shifts to 1150 nm; (c) peak frequency of right-side lobe shifts to 1200 nm

Fig. 7. Output spectra of circularly polarized pulse and elliptically polarized pulses