Low-cost and compact fiber-to-laser coupling with micro-Fresnel lens

Shiro Ogata; Masahiro Yoneda; Tetsuo Maeda; Koichi Imanaka

doi:10.1117/12.49376

1 November 1991 Low-cost and compact fiber-to-laser coupling with micro-Fresnel lens

Shiro Ogata, Masahiro Yoneda, Tetsuo Maeda, Koichi Imanaka

Proceedings Volume 1544, Miniature and Micro-Optics: Fabrication and System Applications; (1991) https://doi.org/10.1117/12.49376
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

A novel laser coupling module composed of a 1.3 micrometers single-mode fiber and a small laser package ((phi) equals 5.6 mm) which builds in a single thin microlens and a 0.78 micrometers emitting laser diode is proposed. A micro Fresnel lens with a high numerical aperture (0.45) and short focal length (0.65 mm) has been utilized for the first time as a laser-to-fiber coupling lens. The proposed laser coupling module measures about 2.8 mm between a laser facet and a fiber edge. The coupling efficiency of 23 in experiment is shown to be adequate for short- haul transmissions and fiber-to-the-home applications. Because all of the elements that compose the present module are able to be obtained at low prices, the design could reduce the cost of laser modules.

Citation Download Citation

Shiro Ogata, Masahiro Yoneda, Tetsuo Maeda, and Koichi Imanaka "Low-cost and compact fiber-to-laser coupling with micro-Fresnel lens", Proc. SPIE 1544, Miniature and Micro-Optics: Fabrication and System Applications, (1 November 1991); https://doi.org/10.1117/12.49376

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