Fig. 1. GVD curve calculated for the fundamental mode with the ZDW of 855 nm, and the inset shows the cross-sectional structure of PCF used.

Fig. 2. (a) Phase-mismatching factor κ at the short wavelength in the fundamental mode of the PCF calculated as a function of wavelength when the pump pulses are centered at 850 nm and the input average power is increased from 300 to 400, and to 500 mW (the peak power of 36 to 48, and to 60 kW), the vertical arrow line corresponding to a pump wavelength of 850 nm and (b) the phase-matching condition between the DW and pump wavelengths for the same pump condition.

Fig. 3. (a) Experimental setup, and (b), (c), (d), and (e) show the observed output far fields at the wavelengths of 650, 620, 500, and 400 nm when the input average power of the pump pulses centered at 850 nm are kept at 500 mW, corresponding to the red, red-orange, green-blue, and pink-violet light, respectively.

Fig. 4. (a) Observed output spectra when the input average power Pav of the pump pulses at 850 nm increases from 300 (black solid line), to 400 (red dashed line), and to 500 mW (blue dot-dashed line), (b) the anti-Stokes wave and DW wavelengths λas and λDW as a function of Pav, and (c) the conversion efficiencies ηas and ηDW, and the output powers Pas and PDW of the anti-Stokes waves and DWs as a function of Pav.