One or more parameters such as time is reported to a center using a form. More specifically, disclosed are a bulk tetrapolymer, comprising 5-60 wt % of an N-substituted maleimide monomer, 10-70 wt % of an a-alkylstyrene monomer, 5-50 wt % of an unsaturated nitrile monomer and 3-50 wt % of an aromatic vinyl monomer, as well as a continuous bulk polymerization process for preparing the same. Here we use an electro-arefractive modulator, with a quadratic electro-optic effect that has an optical transfer function curve) given by is Pout=Pin 2 where asymmetry factor \u03b3 measures the extinction ratio and the phase difference \u03b8 between arms is \u03c0\u2062\u2062V2V\u03c02\u2062\u03c0\u2062V2V\u03c02.