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All-Optical Parametric Delay |
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Presently none of the available optical pulse delay techniques meet all of the anticipated demands for high-speed data communication and signal processing. Such demands are even more severe if one hopes to use photons for quantum computation and computing. We have devised an all-optical tunable delay that meets many of these demands. It is a fiber-based scheme that relies on wavelength conversion, group-velocity dispersion, and wavelength reconversion. The device operates near 1550 nm and generates delays greater than 800 ps. Our delay technique has the combined advantages of continuous control of a wide range of delays from picoseconds to nanoseconds, for a wide range of signal pulse durations (ps to 10 ns), and an output signal wavelength and bandwidth that are the same as that of the input. The scheme can potentially produce fractional delays of 1000 and is applicable to both amplitude- and phase-shift keyed data. |
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Experimental results for the all-optical delay. (a) Plotted on the left axis are the measured (points) along with a linear fit (line). Plotted on the right axis is the expected parametric gain as a function of pump wavelength. (b) Corresponding measured temporal traces, as recorded with a 10-GHz detector, of signal pulses for the data points shown in (a).
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J. Sharping, Y. Okawachi, J. van Howe, C. Xu, Y. Wang, A. Willner, and A. Gaeta, "All-optical, wavelength and bandwidth preserving, pulse delay based on parametric wavelength conversion and dispersion," Opt. Express 13, 7872-7877. PDF
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| 159 Clark Hall |
| Cornell University |
| Ithaca, NY 14853 |
| (607) 255-0657 Lab |
| a.gaeta@cornell.edu |
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