Figure 2 | Scientific Reports

Figure 2

From: Deep-ultraviolet second-harmonic generation by combined degenerate four-wave mixing and surface nonlinearity polarization in photonic crystal fiber

Figure 2

For femtosecond pump pulses with center wavelength λ p of 810 nm and average input power P av of 650 mW (the peak power of 78 kW), (a) The calculated phase-mismatch factor δκ, (b) the calculated phase-mismatch parameter δβ between the propagation constants β(ω as) and β(2ω as) of the anti-Stokes wave and SH, and (c) the output spectrum observed. The insets 1 and 2 in (c) show the output far-field distributions of the anti-Stokes wave and SH observed by the color and black-white-UV CCD cameras, respectively.

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