Possner, U.U.PossnerPossner, T.T.PossnerMesserschmidt, B.B.MesserschmidtKräplin, A.A.KräplinPfeil, A.A.Pfeil2022-03-092022-03-091999https://publica.fraunhofer.de/handle/publica/332585Diffraction-limited focusing lenses with a numerical aperture of 0.52 and diverging lenses with a numerical aperture of 0.62 were fabricated by silver-sodium ion exchange in cylindrical and rod geometry. The silver ion exchange in a sodium-aluminosilicate glass was optimized by the simulation of the diffusion equation for concentration-dependent diffusion coefficients and by direct measurement of the index profile by the refracted -near-field-method. The performance of the lenses was proved by interferometrical measurements of wavefront aberrations. Applications of gradient-index lenses to the fast-axis-collimation (FAC) of high-power lasef diodes and in endoscopic systems are discussed.engradient-index lensesion exchangelaser beam shapingmicro optics620conference paper