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All-Optical Ultrawideband Monocycle Generation Using Quadratic Nonlinear Interaction Seeded by Dark Pulses

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2 Author(s)
Jian Wang ; Wuhan Nat. Lab. for Optoelectron., Huazhong Univ. of Sci. & Technol., Wuhan, China ; Sun, Junqiang

We propose and demonstrate a new approach to all-optical generation of ultrawideband (UWB) monocycle pulses using the quadratic nonlinear interaction seeded by dark pulses in a periodically poled lithium niobate (PPLN) waveguide. When feeding two dark optical pulses with proper relative time delay to participate in the sum-frequency generation (SFG) in a PPLN, the parametric depletion effect accomplishes the tailoring of the dark pulse to be a UWB monocycle pulse at a single wavelength. Pairs of polarity-inverted UWB monocycle pulses are generated in the experiment with the central wavelength, 10-dB bandwidth, and fractional bandwidth conforming to the UWB definition by the U.S. Federal Communications Commission (FCC, part 15).

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 3 )

Date of Publication:

Feb.1, 2010

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