Title :
Spotsize contraction in standard single-mode fibers by use of a GI-fiber tip with a high focusing parameter
Author :
Skiraishi, K. ; Ogura, A. ; Matsuura, K.
Author_Institution :
Fac. of Eng., Utsunomiya Univ., Japan
Abstract :
A spotsize reducer for single-mode fibers (SMFs) was fabricated by use of the quarter-pitch length of a parabolic-index fiber tip having a high focusing parameter. The modal-field diameter of a standard SMF at a wavelength of 1.55 μm has been reduced from 10.4 to 5.8 μm, with the use of the tip. The reducer appears promising for low-loss coupling between standard SMFs and various waveguides, such as dispersion compensated fibers, erbium-doped fibers, and planar waveguides.
Keywords :
gradient index optics; optical fibre couplers; optical focusing; 1.55 micron; fabrication; focusing parameter; graded index fiber tip; low-loss coupling; modal field diameter; single-mode fiber; spotsize reducer; Couplings; Joining processes; Optical fiber dispersion; Optical fibers; Optical planar waveguides; Optical waveguides; Planar transmission lines; Planar waveguides; Semiconductor waveguides; Silicon compounds;
Journal_Title :
Photonics Technology Letters, IEEE
