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

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikel

75 Citaten (Scopus)
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Samenvatting

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
Originele taal-2Engels
Pagina's (van-tot)1008-1010
TijdschriftIEEE Photonics Technology Letters
Volume6
Nummer van het tijdschrift8
StatusGepubliceerd - 1994

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