Arrangement and method relating to optical transmission

Optical waveguides – With optical coupler – Plural

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385 16, 385 37, 385 46, 359123, 359127, G02B 628

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active

060849924

ABSTRACT:
An arrangement and a method route wavelength dependent optical signals including a number of wavelengths. The arrangement includes an optical Add-Drop multiplexing arrangement with input and output waveguides and a routing device with inputs and outputs. The routing device includes a splitting device with a number of inputs and a combining device with a number of outputs. One of the inputs and outputs, respectively, are used for a multi-wavelength input, whereas another input and another output, respectively, are used for an add/drop wavelength. The other inputs and outputs are used for looping back of the remaining wavelengths. Between the splitting and combining devices a number of branch waveguides are arranged, and both wavelength demultiplexing/multiplexing and switching are provided for by the routing device.

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patent: 5414548 (1995-05-01), Tachikawa et al.
patent: 5526153 (1996-06-01), Glance
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Vreeburg, C.G.M. et al., "First InP-Based Reconfigurable Integrated Add-Drop Multiplexer," IEEE Photonics Technology Letters, vol. 9, No. 2, Feb. 1997.
Dam van, C., "Novel InP-Based Phased-Array Wavelength Demultiplexer Using a Generalized MMI-MZI Configuration," Institute of Quantum Electronics, p275-278.
Jenkins, R.M., "Novel 1.times.N and N.times.N integrated optical switches using self-imaging multimode GaAs/AlGaAs waveguides", American Institute of Physics, Feb. 7, 1994, p684-686.
Weber, Jean-Pierre, "A new type of tunable demultiplexer using a multi-leg Mach-Zehnder interferometer," Ericsson Components, p1-4.
Bachmann, P.A., "General self-imaging properties in N.times.N multimode interference couplers including phase relations," Applied Optics, vol. 33 No. 18, Jun. 20, 1994.

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