Abstract

We propose a new technique to realize an optical time lens for ultrafast temporal processing that is based on four-wave mixing in a silicon nanowaveguide. The demonstrated time lens produces more than 100π of phase shift, which is not readily achievable using electro-optic phase modulators. Using this method we demonstrate 20× magnification of a signal consisting of two 3ps pulses, which allows for temporal measurements using a detector with a 20GHz bandwidth. Our technique offers the capability of ultrafast temporal characterization and processing in a chip-scale device.

© 2008 Optical Society of America

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