Abstract
Planar optical waveguides are the key elements in a modern, high-speed optical network. An important problem facing the optical fiber communication system, specifically planar optical waveguides, is coupling. The current study presents a coupling model for planar optical waveguides and optical fibers. The various effects of the optical properties of the coupling interface were analyzed by the scalar finite difference beam propagation method, including the thickness, with or without the matching refractive index of the interface adhesive. The findings can serve as a guide for planar optical waveguide packaging.
Highlights
Planar optical waveguides refer to the fabrication and integration of several optical components on a common planar substrate, such as beam splitters, optical switchers, variable attenuators, interleave filters, and wavelength multiplexers [1,2]
The current study presents a coupling model for planar optical waveguides and optical fibers
The various effects of the optical properties of the coupling interface were analyzed by the scalar finite difference beam propagation method, including the thickness, with or without the matching refractive index of the interface adhesive
Summary
Planar optical waveguides refer to the fabrication and integration of several optical components on a common planar substrate, such as beam splitters, optical switchers, variable attenuators, interleave filters, and wavelength multiplexers [1,2]. Planar optical waveguides have the advantages of low transmission loss, low connection loss to optical fibers, compact size, high reliability, and high reproducibility. They stand at the frontier of development and can provide important support to the generation of optical information technology. UV-cured adhesives have two functions: to bond planar optical waveguides and optical fibers together, and to act as a light propagation medium in optical paths [4]. In this paper, the various effects of the optical properties of coupling interface are analyzed by the scalar finite difference beam propagation method, including the thickness of the interface adhesive, with or without the matching refractive index of the adhesive
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