when I read the paper almost all the author just put the value of AS. I want to know the AS calculation with formula and loss curve. thank you
SPR introduces a dramatic shift in relative phase difference between the s- and p-polarization components at a specific wavelength. Meanwhile, the phase of the s-polarization component remains unaffected by SPR. The interference spectrum detected is determined by the OPD between the p- and s-polarized components. According to Fresnel formula [17,18], the interference spectrum can be expressed as: I(λ) = I0(λ){1 + VSPR(λ) cos[φOPD + φSPR(λ)]} + INoise (1) in which I0(λ) is the light source spectrum, VSPR(λ) is the interference fringe contrast, φOPD is the additional phase difference between the p- and s-polarization components introduced by the birefringence crystal, and φSPR(λ) = |φp − φs | is the SPR phase.
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