TUNABLE LASER AND METHOD TO TUNE A WAVELENGTH OF A LIGHT EMITTED BY THE LASER

The present invention relates to a method to tune a wavelength of a coherent light signal emitted by a tunable laser, the tunable laser comprising:a cavity, the cavity including:a gain medium,an optical tunable filter,a first and a second mirrors, one of which is partially reflective,wherein the opt...

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Bibliographische Detailangaben
Hauptverfasser:	RIGHETTI, Aldo, GRASSO, Giorgio, UBALDI, Maria Chiara
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS 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 DEVICES USING STIMULATED EMISSION ELECTRICITY FREQUENCY-CHANGING MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TESTING
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Beschreibung
Zusammenfassung:	The present invention relates to a method to tune a wavelength of a coherent light signal emitted by a tunable laser, the tunable laser comprising:a cavity, the cavity including:a gain medium,an optical tunable filter,a first and a second mirrors, one of which is partially reflective,wherein the optical tunable filter includes:a first and a second electrodes,a liquid crystal,the method comprising:applying a voltage difference between the first and second electrodes to apply an electric field to the liquid crystal; wherein applying a voltage difference includes:applying the voltage difference for at least a driving time interval lasting less than 1 μs; andvarying the voltage difference applied between the first and second electrodes within the driving time interval so that a maximum applied voltage difference is reached and said maximum applied voltage is above 0.1 kV.