Dalgoutte D G, Smith R B, Achutaramayya G, Harris J H
Appl Opt. 1975 Aug 1;14(8):1860-5. doi: 10.1364/AO.14.001860.
A variety of input-output coupling problems remain central to the development of fiber and integrated optics communication systems. This paper discusses an externally mounted fiber consisting of a high index rectangular waveguide mounted on a larger low index support fiber. These fibers can be used to provide coupling between linear integrated optic guides and fibers or laser sources. Tapered (crossed-) couplers are discussed in this context, and a simple expression for their coupling efficiency is presented. Externally mounted fibers have been fabricated, and experimental efficiencies of 70% for fiber-fiber and integrated optic linear waveguide-fiber coupling obtained. unication systems. This paper discusses an externally mounted fiber consisting of a high index rectangular waveguide mounted on a larger low index support fiber. These fibers can be used to provide coupling between linear integrated optic guides and fibers or laser sources. Tapered (crossed-beta) couplers are discussed in this context, and a simp e expression for their coupling efficiency is presented. Externally mounted fibers have been fabricated, and experimental efficiencies of 70% for fiber-fiber and integrated optic linear waveguide-fiber coupling obtained.
