Title :
Design and characterization of a mode-splitting Ψ-junction
Author :
Veldhuis, G.J. ; Berends, J.H. ; Lambeck, P.V.
Author_Institution :
MESA Res. Inst., Twente Univ., Enschede, Netherlands
fDate :
7/1/1996 12:00:00 AM
Abstract :
It will he shown In this paper, that the mode conversion factor (MCF) as defined for Y-junctions, can be profitably applied for the design of three branch junctions for splitting the three lowest-order modes of a channel waveguide. Accordingly, these so-called mode-splitting Ψ-junctions were designed for implementation in PECVD SiON-technology. Propagation calculations point to crosstalk levels well below -20 dB at 10-20 mm junction length. The produced Ψ-junctions show crosstalk of less than -17 dB, mainly originating from the nonhomogeneity of the refractive indexes of the SiON layers
Keywords :
integrated optics; optical communication equipment; optical constants; optical crosstalk; optical design techniques; optical elements; silicon compounds; PECVD SiON-technology; SiON; SiON layers; branch junctions; channel waveguide; crosstalk levels; junction length; lowest-order mode splitting; mode conversion factor; mode-splitting Ψ-junction design; nonhomogeneity; propagation calculations; refractive indexes; Crosstalk; Light scattering; Microoptics; Optical scattering; Optical waveguides; Propagation constant; Semiconductor waveguides; Shape; Waveguide components; Waveguide junctions;
Journal_Title :
Lightwave Technology, Journal of
