Ko te Potassium Titanyle Arsenate (KTiOAsO4), he karaihe KTA ranei, he karaihe whatu kore raina pai mo te tono Optical Parametric Oscillation (OPO).He pai ake nga whakarea whatu kore-raina me te hiko-a-hiko, he tino heke te whakaurunga i roto i te rohe 2.0-5.0 µm, whanui koki whanui me te paemahana, te iti o te dielectric.