Multimode Interference Couplers With Reduced Parasitic Reflections

Author

Kleijn, E. ; Melati, D. ; Melloni, A. ; de Vries, T. ; Smit, Meint K. ; Leijtens, Xaveer J. M.

Author_Institution

COBRA Res. Inst., Eindhoven Univ. of Technol., Eindhoven, Netherlands

Volume

26

Issue

4

fYear

2014

fDate

Feb.15, 2014

Firstpage

408

Lastpage

410

Abstract

Parasitic reflections can deteriorate the performance of a photonic integrated circuit. This is especially true in circuits containing amplifiers, but even in passive circuits, small reflections can already have a strong influence on circuit performance. It is known that strong reflections can be present when using a 2 × 1 multimode interference coupler (MMI) as a combiner. We investigate methods for reducing these spurious reflections in a generic integration technology. We present a novel MMI shape whose measurements show reduced reflections by 17.5 dB.

Keywords

integrated optics; light interference; light reflection; optical couplers; optical design techniques; optical waveguides; MMI shape; amplifiers; generic integration technology; multimode interference couplers; passive circuits; photonic integrated circuit; reduced parasitic reflections; Couplers; Interference; Layout; Optical waveguides; Performance evaluation; Photonics; Shape; Integrated optics; optical couplers; optical waveguides;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2295624

Filename

6690121