TY - JOUR
T1 - Influence of bandgap and polarization on photo-ionization
T2 - Guidelines for ultrafast laser inscription [Invited]
AU - Little, Douglas J.
AU - Ams, Martin
AU - Withford, Michael J.
PY - 2011/8/1
Y1 - 2011/8/1
N2 - An ultrafast laser was used to fabricate waveguides in Yb:QX phosphate glass and BK7 borosilicate glass using linearly polarized and circularly polarized beams. Circularly polarized pulses were found to induce a higher refractive index change in Yb:QX phosphate glass, while in BK7 borosilicate glass circularly and linearly polarized pulses were found to induce the same refractive index change. An explanation for these contrasting results is proposed based on the fundamental polarization-dependence of photo-ionization. This explanation reconciles observations made in this study and also in a previous study in fused silica glass.
AB - An ultrafast laser was used to fabricate waveguides in Yb:QX phosphate glass and BK7 borosilicate glass using linearly polarized and circularly polarized beams. Circularly polarized pulses were found to induce a higher refractive index change in Yb:QX phosphate glass, while in BK7 borosilicate glass circularly and linearly polarized pulses were found to induce the same refractive index change. An explanation for these contrasting results is proposed based on the fundamental polarization-dependence of photo-ionization. This explanation reconciles observations made in this study and also in a previous study in fused silica glass.
UR - http://www.scopus.com/inward/record.url?scp=84862129292&partnerID=8YFLogxK
U2 - 10.1364/OME.1.000670
DO - 10.1364/OME.1.000670
M3 - Article
AN - SCOPUS:84862129292
SN - 2159-3930
VL - 1
SP - 670
EP - 677
JO - Optical Materials Express
JF - Optical Materials Express
IS - 4
ER -