2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/130111In this paper a new method for spotsize-measurement for singlemode optical components is presented. Based from the classical farfield-method where the measurements are made circular, the mounting of the used rotary stages and the long measurement time are great disadvantages. In this paper a new planar method is described which overcomes these problems. Based on the measurement of a singlemode fiber in accordance with ITU Recommendation G.652 the efficiency is demonstrated and discussed.Published at LANE 2004 in Erlangen, GermanyOpticstext