Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 43: Poster II
Q 43.58: Poster
Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof
Photonic time-stretch system for high-frequency nonrepetitive electrical signals — •Christoph Reinheimer1,2, Stefan Weber1,2, and Georg von Freymann1,2 — 1Fraunhofer Institute for Physical Measurement Techniques, Department Terahertz Measurement and Systems, 79110 Freiburg, Germany — 2University of Kaiserslautern, Physics Department and Research Center OPTIMAS, 67663 Kaiserslautern, Germany
We present a time-stretch system for the measurement of high-frequency electrical signals. The time information of these signals is mapped to the frequency spectrum of a pre-chirped laser pulse using an electro-optical modulator. [Chou, J.; Boyraz, O.; Solli, D.; Jalali, B.: Appl.Phys.Lett. 91, 161105 (2007)] A dispersive fiber element is used to stretch the optical signal to allow for measurement with standard fast photo-diodes and oscilloscopes. A variable temporal magnification up to a factor of 100 and a variable time-aperture up to 880 ps can be achieved by using a resonator geometry for the second dispersive fiber. Signal reconstruction is done by means of an optical back-propagation algorithm. [Stigwall, J.; Galt, S.: J. Lightwave Technol. 25, 3017 (2007)]