CALIBRATING VOLTAGE CONTROLLABLE OPTICAL ELEMENT IN COMMUNICATION SYSTEM
PROBLEM TO BE SOLVED: To provide a method and an apparatus for setting an operating (control) voltage of a voltage controllable optical element having a periodic voltage/optical parameter characteristic. SOLUTION: The apparatus includes: a means operable to set the voltage (V) applied to the compone...
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| creator | VASS DARREN BUTLER GRAHAM LEACH MICHAEL LIVERMORE PETER JAMES |
| description | PROBLEM TO BE SOLVED: To provide a method and an apparatus for setting an operating (control) voltage of a voltage controllable optical element having a periodic voltage/optical parameter characteristic. SOLUTION: The apparatus includes: a means operable to set the voltage (V) applied to the component to a predetermined initial value, that is, an up/down counter and a D/A converter; a means for measuring the optical parameter (P); a means for sequentially progressively increasing and decreasing the voltage (incrementing/decrementing the counter) with respect to the predetermined value; and a means for determining the respective voltage values (V0and V∞) which produce the maximum and minimum values of the optical parameter. The means operable to set the voltage sets the voltage (V) to an intermediate value ((V0+V∞)/2). Further, the apparatus comprises a means for determining the sense of the slope of that portion of the periodic characteristic lying between the maximum and minimum values for use by a control loop during subsequent operation of the optical element. COPYRIGHT: (C)2008,JPO&INPIT |
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SOLUTION: The apparatus includes: a means operable to set the voltage (V) applied to the component to a predetermined initial value, that is, an up/down counter and a D/A converter; a means for measuring the optical parameter (P); a means for sequentially progressively increasing and decreasing the voltage (incrementing/decrementing the counter) with respect to the predetermined value; and a means for determining the respective voltage values (V0and V∞) which produce the maximum and minimum values of the optical parameter. The means operable to set the voltage sets the voltage (V) to an intermediate value ((V0+V∞)/2). Further, the apparatus comprises a means for determining the sense of the slope of that portion of the periodic characteristic lying between the maximum and minimum values for use by a control loop during subsequent operation of the optical element. COPYRIGHT: (C)2008,JPO&INPIT</description><language>eng</language><subject>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 ; FREQUENCY-CHANGING ; MEASURING ; MEASURING ELECTRIC VARIABLES ; MEASURING MAGNETIC VARIABLES ; NON-LINEAR OPTICS ; OPTICAL ANALOGUE/DIGITAL CONVERTERS ; OPTICAL LOGIC ELEMENTS ; OPTICS ; PHYSICS ; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF ; TESTING</subject><creationdate>2008</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20080717&DB=EPODOC&CC=JP&NR=2008165253A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20080717&DB=EPODOC&CC=JP&NR=2008165253A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>VASS DARREN</creatorcontrib><creatorcontrib>BUTLER GRAHAM</creatorcontrib><creatorcontrib>LEACH MICHAEL</creatorcontrib><creatorcontrib>LIVERMORE PETER JAMES</creatorcontrib><title>CALIBRATING VOLTAGE CONTROLLABLE OPTICAL ELEMENT IN COMMUNICATION SYSTEM</title><description>PROBLEM TO BE SOLVED: To provide a method and an apparatus for setting an operating (control) voltage of a voltage controllable optical element having a periodic voltage/optical parameter characteristic. SOLUTION: The apparatus includes: a means operable to set the voltage (V) applied to the component to a predetermined initial value, that is, an up/down counter and a D/A converter; a means for measuring the optical parameter (P); a means for sequentially progressively increasing and decreasing the voltage (incrementing/decrementing the counter) with respect to the predetermined value; and a means for determining the respective voltage values (V0and V∞) which produce the maximum and minimum values of the optical parameter. The means operable to set the voltage sets the voltage (V) to an intermediate value ((V0+V∞)/2). Further, the apparatus comprises a means for determining the sense of the slope of that portion of the periodic characteristic lying between the maximum and minimum values for use by a control loop during subsequent operation of the optical element. 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SOLUTION: The apparatus includes: a means operable to set the voltage (V) applied to the component to a predetermined initial value, that is, an up/down counter and a D/A converter; a means for measuring the optical parameter (P); a means for sequentially progressively increasing and decreasing the voltage (incrementing/decrementing the counter) with respect to the predetermined value; and a means for determining the respective voltage values (V0and V∞) which produce the maximum and minimum values of the optical parameter. The means operable to set the voltage sets the voltage (V) to an intermediate value ((V0+V∞)/2). Further, the apparatus comprises a means for determining the sense of the slope of that portion of the periodic characteristic lying between the maximum and minimum values for use by a control loop during subsequent operation of the optical element. COPYRIGHT: (C)2008,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | 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 FREQUENCY-CHANGING MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TESTING |
| title | CALIBRATING VOLTAGE CONTROLLABLE OPTICAL ELEMENT IN COMMUNICATION SYSTEM |
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