We demonstrate the interest of expanded beam microlenses (around 55 µm of mode field diameter) to relax positioning tolerances and to decrease reflectance in single mode fiber to fiber interconnections . We also point out the interest of micro-lenses of very small mode field diameter (around 2 µm) to improve coupling efficiency in specialty fibers and integrated waveguides for non linear effects based functions and for sensors applications at a wavelength of µm. | Communications in Physics, Vol. 26, No. 4 (2016), pp. 325-334 DOI: STUDY OF OPTIMIZED COUPLING BASED ON MICRO-LENSED FIBERS FOR FIBERS AND PHOTONIC INTEGRATED CIRCUITS IN THE FRAMEWORK OF TELECOMMUNICATIONS AND SENSING APPLICATIONS SY DAT LE1 , ENGUERRAN DELCOURT1 , PAULINE GIRAULT1 , ALDO GUTIERREZ-ARROYO1 , PAUL AZUELOS1 , NATHALIE LORRAIN1 , LO¨IC BODIOU1 , LUIZ POFFO1 , JEAN-MARC GOUJON1 , YANNICK DUMEIGE1 , ISABELLE HARDY1 , PHILIPPE ROCHARD1 , JONATHAN LEMAITRE1 , PARASTESH PIRASTEH1 , MOHAMMED GUENDOUZ1 , THIERRY CHARTIER1 , 2 , SEBASTIEN ´ ´ LIONEL QUETEL CLAUDOT3 , 1 ¨ CHARRIER AND MONIQUE THUAL1,† JOEL 1 Foton UMR CNRS 6082, Universit´ e de Rennes 1, 22305, CS80518 Enssat Lannion 2 IDIL Fibres optiques, 21 rue Louis De Broglie 22300 Lannion, France 3 Souriau - Esterline ECT, RD323, 72470 Champagn´ e, France † E-mail: Received 01 December 2016 Accepted for publication 16 January 2017 Abstract. We demonstrate the interest of expanded beam microlenses (around 55 µm of mode field diameter) to relax positioning tolerances and to decrease reflectance in single mode fiber to fiber interconnections . We also point out the interest of micro-lenses of very small mode field diameter (around 2 µm) to improve coupling efficiency in specialty fibers and integrated waveguides for non linear effects based functions and for sensors applications at a wavelength of µm. Keywords: optical interconnection, fiber optics, integrated optics, microlenses. Classification numbers: , . Ua. c 2016 Vietnam Academy of Science and Technology 326 STUDY OF OPTIMIZED COUPLING BASED ON MICRO-LENSED FIBERS FOR FIBERS AND PHOTONIC . . . I. INTRODUCTION Injecting optical signal from a single mode fiber (SMF) to a fiber or an integrated waveguide is a common problem encountered in many kinds of applications. In the field of optical telecommunications, laser to fiber, fiber to fiber, or fiber to integrated .
