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Authors: W. Van Parys, B. Moeyersoon, D. Van Thourhout, R. Baets, M. Vanwolleghem, B. Dagens, J. Decobert, O. Le Gouezigou, D. Make, R. Vanheertum, L. Lagae
Title: Transverse magnetic mode nonreciprocal propagation in an amplifying
Format: International Journal
Publication date: 2/2006
Journal/Conference/Book: Applied Physics Letters
Volume(Issue): 88 p.071115
Internal Reference: [N-465]
Download: Download this Publication (196KB) (196KB)

Abstract

The design, fabrication, and characterization of an amplifying transverse magnetic TM-mode
optical waveguide isolator operating at a wavelength of 1300 nm are presented. The
magneto-optical Kerr effect induces nonreciprocal modal absorption in a semiconductor optical
amplifier with a laterally magnetized ferromagnetic metal contact. Current injection in the active
structure compensates for the loss in the forward propagation direction. Monolithic integration of
this optical isolator configuration with active InP-based photonic devices is straightforward. The
combination of AlGaInAs/InP active material and the metal alloy Co50Fe50 results in greatly
improved performance. 99 dB/cm TM mode isolation and significantly reduced insertion loss are
demonstrated.

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