All-optical AND and NAND gates based on cascaded second-order nonlinear processes in a Ti-diffused periodically poled LiNbO(3) waveguide.
Yeung Lak Lee,Bong Ahn Yu,Tae Joong Eom,Woojin Shin,Changsoo Jung,Young Chul Noh,Jongmin Lee,Do-Kyeong Ko,Kyunghwan Oh +8 more
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TL;DR: All-optical AND and NAND gates have been demonstrated in a Ti-diffused periodically poled LiNbO(3) channel waveguide which has two second-harmonic phase-matching peaks by cascaded sum- frequency-generation/difference-frequency-generation (cSFG/DFG) and sum- Frequency- Generation (SFG) processes.
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Abstract: All-optical AND and NAND gates have been demonstrated in a Ti-diffused periodically poled LiNbO3 channel waveguide which has two second-harmonic phase-matching peaks by cascaded sum-frequency-generation/difference-frequency-generation (cSFG/DFG) and sum-frequency-generation (SFG) processes. The conversion efficiency of signal to idler (AND gate signal) was approximately 0 dB in cSFG/DFG process. In the second SFG process, more than 15 dB extinction ratio between signal and dropped signal (NAND gate signal) has been observed.
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1.5-microm-band wavelength conversion based on difference-frequency generation in LiNbO3 waveguides with integrated coupling structures.
TL;DR: In this paper, the authors reported wavelength conversion within the 1.5?µm telecommunications band based on difference-frequency generation in periodically poled lithium niobate waveguides with integrated coupling structures.
All-optical NAND gate using cross-gain modulation in semiconductor optical amplifiers
TL;DR: In this paper, an all-optical NAND gate at 10 Gbit/s was demonstrated using gain nonlinearity characteristics of a semiconductor optical amplifier, which operates in a single cross-gain modulation mechanism.
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Multiple quasi-phase-matched LiNbO3 wavelength converter with a continuously phase-modulated domain structure.
TL;DR: Optized continuous phase modulation of a periodic domain structure makes possible multichannel pumping with minimum loss of efficiency and variable and simultaneous wavelength conversion of wavelength-division multiplexed signals are demonstrated.
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