TY - JOUR
T1 - Effect of refractive index mismatch aberration in arsenic trisulfide
AU - Cumming, Benjamin P.
AU - Debbarma, Sukanta
AU - Luther-Davies, Barry
AU - Gu, Min
PY - 2012/11
Y1 - 2012/11
N2 - We demonstrate compensation for the spherical aberration due to the refractive index mismatch that occurs when a laser beam is focused into a thick arsenic trisulfide (As -2 S -3 ) film with a high numerical aperture objective. The effects of the aberration at different focal depths on the point spread function have been calculated numerically and the axial response method shown to be a useful measure for compensating the spherical aberration. We show that with the addition of adaptive optics based on a spatial light modulator, the aberration can be significantly reduced, resulting in an increase in peak intensity by a factor of 2.4 and a decrease in axial elongation by a factor of 2.2.
AB - We demonstrate compensation for the spherical aberration due to the refractive index mismatch that occurs when a laser beam is focused into a thick arsenic trisulfide (As -2 S -3 ) film with a high numerical aperture objective. The effects of the aberration at different focal depths on the point spread function have been calculated numerically and the axial response method shown to be a useful measure for compensating the spherical aberration. We show that with the addition of adaptive optics based on a spatial light modulator, the aberration can be significantly reduced, resulting in an increase in peak intensity by a factor of 2.4 and a decrease in axial elongation by a factor of 2.2.
UR - http://www.scopus.com/inward/record.url?scp=84869504272&partnerID=8YFLogxK
U2 - 10.1007/s00340-012-5180-9
DO - 10.1007/s00340-012-5180-9
M3 - Article
SN - 0946-2171
VL - 109
SP - 227
EP - 232
JO - Applied Physics B: Lasers and Optics
JF - Applied Physics B: Lasers and Optics
IS - 2
ER -