Title :
A field-profile transformer utilizing a graded-index oval-core (GIO) fiber
Author :
Ogura, Akira ; Shiraishi, Kazuo
Author_Institution :
Fac. of Eng., Utsunomiya Univ., Japan
fDate :
1/1/2001 12:00:00 AM
Abstract :
A field-profile transformer utilizing a graded-index (GI) fiber having an oval core is proposed. Numerical investigation has demonstrated that the new fiber is capable of performing the profile transformation from elliptical fields that have high aspect ratios of up to 9, to circular fields, and vice versa. Experimental verification is also performed at a wavelength of 1550 nm, by making use of plastic GI fibers, demonstrating that a circular modal field of a standard single-mode fiber can be transformed into an elliptical field with an aspect ratio of 4.1. The transformer shows promise for low-loss coupling between fibers and functional devices that have elliptical fields, such as planar waveguides, semiconductor optical amplifiers, and laser diodes
Keywords :
electromagnetic fields; gradient index optics; optical communication equipment; optical fibre couplers; optical fibre losses; optical polymers; plastics; 1550 nm; aspect ratio; circular fields; circular modal field; elliptical fields; field-profile transformer; graded-index oval-core fiber; high aspect ratios; laser diodes; low-loss coupling; planar waveguides; plastic GI fibers; profile transformation; semiconductor optical amplifiers; standard single-mode fiber; Diode lasers; Optical coupling; Optical fiber devices; Optical planar waveguides; Optical waveguides; Planar waveguides; Plastics; Semiconductor optical amplifiers; Semiconductor waveguides; Transformer cores;
Journal_Title :
Lightwave Technology, Journal of
