Extremely small multimode interference couplers and ultrashort bends on InP by deep etching

L.H. Spiekman, Y.S. Oei, E.G. Metaal, F.H. Groen, I. Moerman, M.K. Smit

Research output: Contribution to journalArticlePopular

75 Citations (Scopus)
93 Downloads (Pure)

Abstract

We realized the smallest integrated optical multimode interference (MMI) couplers to date by etching through the quaternary guiding layer, maximizing the lateral index contrast, and thus obtaining a sufficient number of guided modes for proper operation despite the small size. Results include a 107 mu m long 3 dB coupler with 0.9 dB excess loss and 0.2 dB unbalance, and a 216 mu m long cross coupler with 2.0 dB excess loss and -28 dB crosstalk (TE). We also succeeded in making waveguide bends with a record bending radius of only 30 mu m and negligible radiation loss
Original languageEnglish
Pages (from-to)1008-1010
JournalIEEE Photonics Technology Letters
Volume6
Issue number8
Publication statusPublished - 1994

Fingerprint

Dive into the research topics of 'Extremely small multimode interference couplers and ultrashort bends on InP by deep etching'. Together they form a unique fingerprint.

Cite this