Title :
Architecture of crosstalk-reduced digital optical 2 x 2 switch (CRDOS)
Author :
Nolting, H.P. ; Gravert, M.
Author_Institution :
Heinrich-Hertz-Inst. fur Nachrichtentech. Berlin GmbH, Germany
Abstract :
Coherent crosstalk of optical space switch matrices is a key problem of optical transparent networks. An analysis of the crosstalk sources of electrooptical digital switches (DOS) is given and a new crosstalk compensating technique based on the integration of a general mode converter as correcting device into a 3/spl times/2 DOS is proposed and theoretically investigated. It can be shown, that a -20 dB crosstalk 2/spl times/2 DOS device can be enhanced to -40 dB. This architecture leads to an increase of the device length by only a few percent. It opens up the possibility to realize short optical switches for larger matrices.<>
Keywords :
compensation; electro-optical switches; optical crosstalk; switching networks; coherent crosstalk; correcting device; crosstalk compensating technique; crosstalk source; crosstalk-reduced digital optical 2/spl times/2 switch architecture; electrooptical digital switches; general mode converter; integration; optical space switch matrices; optical transparent networks; short optical switches; Electrooptic devices; Matrix converters; Optical crosstalk; Optical fiber networks; Optical receivers; Optical switches; Optical waveguides; Refractive index; Transmission line matrix methods; Waveguide transitions;
Journal_Title :
Photonics Technology Letters, IEEE
