iPhone app iPhasematch

iPhasematch allows you to calculate the phasematching condition of nonlinear wavelength conversion such as SHG or SFM based on published Sellmeier equiations.
Downconversion (OPO) can be figured out by the reverse of SFM.
It is a subset of the Qmix function of a famous Windows software SNLO by Dr.
Arlee Smith.
This App does some of what SNLO does on your iOS device.

It takes the crystal, two input wavelengths, and temperature and gives the phasematching orientations, effective nonlinear optical coefficients, walk-off angles, angular tolerance and temperature tolerance.
In case of SHG, it also gives spectral tolerance.

In biaxial crystals, it gives only the phasematching orientations in the principal planes, i.e., either theta=90 deg.
or phi=0 or 90deg.

Currently supported crystals: BBO, BiBO, CBO, CLBO, LB4, LBO, KBBF, KDP, KD*P, KN, KTP, Mg: LN, Mg: sLN, RBBF, RTP, YAB.

NOTE: dn/dT data for LB4 was picked up from discrete data points in the reference and linearly extrapolated.

Interface should be intuitive, giving phasematching with a tap of PM button,refractive index with index button and group index with Gp.Idx button, for the given condition (crystal, wavelengths, and temperature).

DISCLAIMER: I cannot be held responsible for the result of the calculation it gives.
I make every effort to make it accurate, and bug-free, but there could be errors in code.
Please just use this on your own discretion.,

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