If we have to drill a Hole on su8 photoresist layer with 2 micrometer hole depth and 2 micrometer in Diameter by Femtosecond laser drilling just near to another hole so newtons rings will be overlap the newton rings of other hole. If the distance is just 3 micrometer between the both hole so which parameter should be change to decrease the newton rings effect to create a multi hole array on SU8 photoresist with the hole depth of 2 micrometer ?