Title :
An improved single-mode Y-branch design for cascaded 1:2 splitters
Author :
Klekamp, A. ; Kersten, P. ; Rehm, W.
Author_Institution :
Telekom Res. Centre, Alcatel SEL, Stuttgart, Germany
fDate :
12/1/1996 12:00:00 AM
Abstract :
The power splitting ratio of Y-branches based on step index waveguides has been calculated using three-dimensional (3-D) finite-difference beam propagation method (FD-BPM). Due to interference of the guided mode with quasiguided modes generated at distortions of the waveguide the splitting ratio depends on the wavelength and design parameters of the Y-branch. The simulations show how variations of the splitting ratio can be minimized using a mode-filter in the input section without significant increase of losses or component size
Keywords :
finite difference methods; light interference; optical design techniques; optical elements; optical losses; optical waveguide filters; optical waveguide theory; refractive index; simulation; 3D finite-difference beam propagation method; cascaded 1:2 splitters; component size; design parameters; guided mode interference; input section; mode-filter; power splitting ratio; quasiguided modes; simulations; single-mode Y-branch design; splitting ratio; step index waveguides; waveguide distortions; Finite difference methods; Interference; Optical devices; Optical distortion; Optical fiber devices; Optical fiber polarization; Optical interferometry; Optical losses; Optical waveguides; Power generation;
Journal_Title :
Lightwave Technology, Journal of
