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(a) Calculated effective refractive indices of the LP01 (solid) and the LP02 (dashed) modes. (b) Propagation constant mismatch, Δβ, as a function of Stokes shift Ω, for pump wavelength at 1064 nm. The dashed line indicates the phase matching condition. Calculated anti-Stokes wavelength (c) and Stokes wavelength (d) as functions of the pump wavelength. The dashed line indicates the center pump wavelength.
Output spectra after 1.75 m of HOM fiber with input pulse energies of 11, 14, and 21 nJ. Inset: Spectrum of the Stokes light at input energy of 21 nJ.
Measured spatial profiles of the anti-Stokes light at 941 nm and the Stokes light at 1225 nm, magnified by a factor of 100. Note that the vertical axes are in logarithmic scale. (Adapted from Ref. 19. Copyright 2012, The Optical Society.)
Measured second-order intensity autocorrelation traces of the anti-Stokes pulse (a) and Stokes pulse (b) at input pulse energy of 21 nJ. (Adapted from Ref. 19. Copyright 2012, The Optical Society.)
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