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Crosstalk reduced digital optical switch with single electrode designed for InP

: Nolting, H.-P.; Gravert, M.; Bachmann, M.; Renaud, M.

Optical Society of America -OSA-, Washington/D.C.; IEEE Lasers and Electro-Optics Society:
Integrated Photonics Research 1996. Postconference Edition : Summaries of papers presented at the topical meeting, April 29 - May 2, 1996, Boston, Massachusetts
Washington, DC: OSA, 1996 (OSA Technical digest series 1996,6)
ISBN: 1-557-52438-6
ISBN: 1-557-52439-4
ISBN: 1-557-52417-3
Integrated Photonics Research Topical Meeting <1996, Boston/Mass.>
Conference Paper
Fraunhofer HHI ()
iii-v semiconductors; indium compounds; integrated optics; mode matching; optical communication equipment; optical crosstalk; optical directional couplers; optical switches; single electrode; inp; coherent crosstalk; digital optical switch; optical space switch matrices; optical transparent networks; crosstalk compensating technique; single electrode mode converter; correcting device; 2*2 digital optical switch; 1*2 digital optical switch; mode converter stage; device length; control algorithm; realistic design

Coherent crosstalk of optical space switch matrices is a key problem of optical transparent networks. A new crosstalk compensating technique based on the integration of a single electrode mode converter as correcting device into a 1*2 or 2*2 digital optical switch (DOS) is proposed and theoretically investigated. Introduction of the mode converter stage enhances a -20 dB crosstalk DOS device to -40 dB with only a small increase of the device length. The new scheme with one common electrode for DOS and converter simplifies a recently published architecture needing 4 additional electrodes and a special control algorithm. A realistic design of a -40 dB crosstalk DOS based on InP is presented.