Micro-lensed fibers for coupling optimization in optical fibers and photonic integrated circuits

Abstract

International audienceWe demonstrate the interest of expanded beam microlenses (around 55µm of mode field diameter) to relax positioning tolerances and to decrease reflectance in single mode fiber to fiber interconnexions. 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 1.55 µm