Reflection properties of multimode interference devices

Author

Pennings, E.C.M. ; van Roijen, R. ; van Stralen, M.J.N. ; de Waard, P.J. ; Koumans, R.G.M.P. ; Verbeck, B.H.

Author_Institution

Philips Res. Lab., Eindhoven, Netherlands

Volume

6

Issue

6

fYear

1994

fDate

6/1/1994 12:00:00 AM

Firstpage

715

Lastpage

718

Abstract

We report on the reflection properties of multimode interference (MMI) devices: we distinguish between reflection back into the input waveguides and internal resonance modes due to the occurrence of simultaneous self-images. Because of self-imaging, reflection can be extremely efficient, even in the case of MMI devices with optimized transmission. This conclusion is confirmed by the observed spectral behavior of InP-based ring lasers incorporating MMI 3 dB couplers and MMI power splitters. Several techniques are proposed to minimize the influence of these reflections.<>

Keywords

III-V semiconductors; indium compounds; integrated optics; laser accessories; light interference; light reflection; optical couplers; optical images; optical waveguides; ring lasers; semiconductor lasers; InP; InP-based ring lasers; MMI couplers; MMI power splitters; back reflection; input waveguides; internal resonance modes; multimode interference devices; optimized transmission; reflection properties; self-imaging; spectral behavior; Couplers; Interference; Laser modes; Mirrors; Optical reflection; Optical waveguides; Power lasers; Resonance; Ring lasers; Waveguide lasers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.300172

Filename

300172