Tunable optical add-drop multiplexer based on SOI wafer and...

Optical waveguides – With optical coupler – Input/output coupler

Reexamination Certificate

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C385S015000, C385S031000

Reexamination Certificate

active

10829611

ABSTRACT:
A tunable optical add-drop multiplexer (OADM) based on an SOI (silicon-on-insulator) wafer is disclosed. The tunable OADM includes a multimode interference region, at least a grating formed on the multimode interference region, and at least two electrodes formed on two sides of the multimode interference region and having carriers induced thereinto, thereby a variation of an optical waveguide in the grating is controlled through controlling the carriers induced into the electrodes so as to further control different propagation of wavelength signals.

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patent: 6438293 (2002-08-01), Eldada et al.
patent: 63-76391 (1988-04-01), None
Rodney C. Tucker and Richard Lauder, “Optical Add-Droop Multiplexer with Low Crosstalk”, IEEE Photonics Technology Letters, vol. 13, No. 6, pp. 582-584, Jun. 2001.
David Mechin, Philippe Grosso, and Dominque Bosc, “Add-Drop Multiplexer With UV-Written Bragg Gratings and Directional Coupler in Sio2-Si Intergrated Waveguides”, Journal of Lightwave Technology, vol. 19, No. 9, pp. 1282-1286, Sep. 2001.
Shih-Hsiang Hsu, O. King, F.G. Johnson, J.V. Hryniewicz, Y.J. Chen and D.R. Stone, “InGaAspindetector array intergrated with AlGaAs/GaAs grating demultiplexer by total internal reflector”, Electronics Letters vol. 35, No. 15, pp. 1248-1249, Jul. 1999.

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