Title :
Spot size, adiabaticity and diffraction in tapered fibres
Author_Institution :
Australian National University, Optical Sciences Centre, Canberra, Australia
Abstract :
A simple formula is given for the maximum spot size achievable by downtapering a single-mode fibre, regardless of core profile. When the fundamental-mode field is approximately Gaussian, the maximum taper angle associated with minimal loss of spot-size power on a finite-length taper is the classical diffraction angle for a beam passing through a circular aperture.
Keywords :
fibre optics; optical waveguide theory; circular aperture; classical diffraction angle; diffraction; downtapering; finite-length taper; fundamental-mode field; maximum spot size achievable; maximum taper angle; minimal loss of spot-size power; single-mode fibre; tapered fibres;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870697
