F. K. Lau, C. W. Tee, C. H. Kwok, R. V. Penty, I. H. White, N. Michel, and M. Krakowski, "Integrated 10th Order Fresnel Lens Design for Beam Quality Enhancement in Tapered Laser Diode,"
in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies,
OSA Technical Digest Series (CD)
(Optical Society of America, 2007), paper CThB7.
An integrated 10th order Fresnel lens capable of improving the laser beam quality is reported. The far-field divergence is narrowed by an average of 1.9° (29%) and an overall M²-factor improvement of 15% is recorded.