Abstract

We propose an all-optical tunable notch filter based on sum-frequency-generation (SFG) in periodically poled lithium niobate (PPLN) waveguide. The maximum signal depletion achieves −23.7 dB when the central wavelength is tuned at 1545 nm. This nonlinear optical filter owns a wide tuning range.

© 2012 Optical Society of America

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