METHOD AND APPARATUS FOR CONTROLLING AN ELECTRO-OPTICAL SWITCH

METHOD AND APPARATUS FOR CONTROLLING AN ELECTRO-OPTICAL SWITCH

A control arrangement for minimizing optical leakage in a time-division, mul ti-stage electro-optical switch by the periodic adjustme nt of switching voltage levels. An optical detector connected to an idle port of the switch transmits a leakage signal which represent s optical leakage in the switch...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SUGARBAKER, DANIEL L, PAGE, JERRY L
Format: Patent
Sprache:eng ; fre
Schlagworte:
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
FREQUENCY-CHANGING
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
SELECTING
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
TRANSMISSION
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Beschreibung
Zusammenfassung:A control arrangement for minimizing optical leakage in a time-division, mul ti-stage electro-optical switch by the periodic adjustme nt of switching voltage levels. An optical detector connected to an idle port of the switch transmits a leakage signal which represent s optical leakage in the switch in various configurations of the switch. The leakage signal is filtered by a low pass filter and sampled at a low rate. A processor stores the sampled data and periodically analyzes the data to de termine the appropriate changes in the switching voltage levels for each of the stages of the switch to minimize optical leakage. An output circuit connected to the processor and the switch modif ies a previously determined base voltage signal for each of the stages to incorpor ate the voltage level changes and applies the modified s ignals to the switch in the appropriate time slots.