OPTICAL SYSTEM AND METHOD FOR ULTRASHORT LASER PULSE CHARACTERIZATION

The optical system comprises: means (110) for introducing a controlled negative or positive chirp to an incoming ultrashort laser pulse to be characterized (101); a nonlinear optical medium (120) through which said chirped ultrashort laser pulse (111) is propagated, wherein as a result of said propa...

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Bibliographische Detailangaben
Hauptverfasser:	Cojocaru, Crina Maria, Trull Silvestre, José Francisco, Maia Da Silva, Francisco José, Sola Larrañaga, Iñigo Juan, Romero Muñiz, Rosa Maria, Paiva Rebelo Cerejo Crespo, Helder Manuel
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS COLORIMETRY 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 MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS RADIATION PYROMETRY TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TESTING
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Beschreibung
Zusammenfassung:	The optical system comprises: means (110) for introducing a controlled negative or positive chirp to an incoming ultrashort laser pulse to be characterized (101); a nonlinear optical medium (120) through which said chirped ultrashort laser pulse (111) is propagated, wherein as a result of said propagation: different chirp values are introduced in the ultrashort laser pulse (111) at different propagation distances along the nonlinear optical medium (120), and a transverse nonlinear signal (125) is generated in a direction perpendicular to the propagation axis; analyzing means (130) configured for recording a single-shot spectral image of said generated transverse nonlinear signal (125); and a processing module (140) comprising one or more processors configured to execute a numerical iterative algorithm to said single-shot spectral image to retrieve the electric field, amplitude and phase, of the ultrashort laser pulse (101). The transverse nonlinear signal may be generated by transverse SHG (TSHG) and pulse characterisation may be based on the dispersion-scan or a MIIPS technique utilizing TSHG.