Planar monomode optical couplers based on multimode interference effects

Author

Soldano, Lucas B. ; Veerman, Frank B. ; Smit, Meint K. ; Verbeek, Bastiaan H. ; Dubost, Alain H. ; Pennings, Erik C M

Author_Institution

Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands

Volume

10

Issue

12

fYear

1992

fDate

12/1/1992 12:00:00 AM

Firstpage

1843

Lastpage

1850

Abstract

The self-imaging property of a homogeneous multimoded planar optical waveguide has been applied in the design of passive planar monomode optical couplers based on multimode interference (MMI). Based on these designs, 3 dB and cross couplers were fabricated in SiO₂/Al₂O₃/SiO₂ channel waveguides on Si substrates. Theoretical predictions and experimental results at 1.52-μm wavelength are presented which demonstrate that MMI couplers offer high performance: on-chip excess loss better than 0.5 dB, high reproducibility, low polarization dependence and small device size

Keywords

integrated optics; optical couplers; optical design techniques; optical images; optical losses; optical waveguide theory; 0.5 dB; 1.52 micron; IR; Si substrates; SiO₂-Al₂O₃-SiO₂; channel waveguides; cross couplers; high performance; high reproducibility; homogeneous multimoded; low polarization dependence; multimode interference; multimode interference effects; on-chip excess loss; optical coupler design; passive planar monomode optical couplers; planar optical waveguide; self-imaging property; small device size; Couplers; Interference; Optical design; Optical planar waveguides; Optical waveguide theory; Optical waveguides; Performance loss; Planar waveguides; Polarization; Reproducibility of results;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.202837

Filename

202837