1 January 2007 Truncated Gaussian beams through microlenses based on a graded-index section
Author Affiliations +
Optical Engineering, 46(1), 015402 (2007). doi:10.1117/1.2431798
We have developed a simple and low-cost microlens for optical communication systems involving the coupling of laser diodes or integrated waveguides to single-mode fibers (SMFs), and fiber-to-fiber interconnection. More generally, the applications concern coupling active or passive components to SMFs. The novelty consists in using a graded-index section of 125-μm core diameter without cladding and taking into account the diffraction effects. This new microlens offers a wider range of mode field diameters (from around 5 to 90 μm) and working distances (up to 2000 μm) than previously demonstrated. This paper investigates the influence of the Fresnel diffraction of a Gaussian beam, during its propagation through the microlens, on the mode field intensity profile, the working distance, and the coupling efficiency of this kind of microlens in front of a SMF. It shows that while truncation causes multiple maxima of the coupling efficiency as a function of z displacement, it does not decrease the maximum coupling efficiency.
Monique Thual, Damien Malarde, B. Abherve-Guegen, P. Rochard, Philippe Chanclou, "Truncated Gaussian beams through microlenses based on a graded-index section," Optical Engineering 46(1), 015402 (1 January 2007). https://doi.org/10.1117/1.2431798


A novel twin-core fiber connector
Proceedings of SPIE (July 01 2015)
Beam transformations by active GRIN materials
Proceedings of SPIE (July 26 2011)
Integration of microlens with planar lightwave circuit
Proceedings of SPIE (March 11 2005)

Back to Top