Beat-length measurement in directional couplers by thermo-optic modulation

In integrated-optical directional couplers formed by two parallel waveguides we measure the difference Deltabeta = beta(even) - ss(odd) between the propagation constants of the supermodes. We couple them locally by heating a fine spot on one of the guides. When the spot is scanned along the coupler,...

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Veröffentlicht in:	Optics letters 1996-08, Vol.21 (15), p.1189-1191
Hauptverfasser:	Gnewuch, H, Román, J E, Hempstead, M, Wilkinson, J S, Ulrich, R
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext
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