Chalopin, Benoît Chiummo, Antonino Fabre, Claude Maître, Agnès Treps, Nicolas Media 1: Frequency doubling of low power images using a self-imaging cavity Originally published in Optics Express on 12 April 2010 (oe-18-8-8033) 12 April 2010;media;Optics Express;Frequency;self-imaging cavity;oe;power images 2010-04-12
    https://opticapublishing.figshare.com/articles/media/Media_1_Frequency_doubling_of_low_power_images_using_a_self-imaging_cavity/4942226
10.1364/OE.18.008033.m001