25 November 1993 Fabrication of planar gradient index cylindrical microlenses and their application to laser diode collimation
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Abstract
Using the Ag+-Na+ exchange in a special optical glass one- and two- dimensional refractive index profiles of definite shape have been realized. It is shown that good quality one-dimensional parabolic profiles can be used for micro-cylindrical lens fabrication with high possible numerical aperture N.A. <EQ 0.46. Two-dimensional refractive index gradients of stripe waveguide geometry generated by field assisted ion exchange through a linear mask window form single cylindrical lenses as well as cylindrical lens arrays with comparable low N.A. <EQ 0.15 which can be used for the transformation of the weakly divergent direction of a laser diode or laser diode bars. Two crossed lenses of different numerical aperture are applicable for high power laser diode collimation.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Torsten Possner, Rolf Goering, "Fabrication of planar gradient index cylindrical microlenses and their application to laser diode collimation", Proc. SPIE 2000, Current Developments in Optical Design and Optical Engineering III, (25 November 1993); doi: 10.1117/12.163663; https://doi.org/10.1117/12.163663
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