Ultra-Small Optical Components: Lens And Hybrid Lens

Ultra -small optical components: lens and "hybrid lens"Yoshikazu Nishiwaki, Mitsuru Nishikawa, Kimizo Ono, Ken -ichi YoshidaResearch and Development Group, Sumitomo Electric Industries, Ltd.1 -3, Shimaya 1- chome, Konohana -ku, Osaka -shi, JapanAbstractAn ultra -small convex glass -rod lens with a diameter of 0.5mm was developed, and acoupling efficiency of 21% between laser diode and single mode fiber was attained. Thisvalue is considerably higher than that of commercially available graded -index lenses.