160-Gb/s All-Optical OTDM Demultiplexing and Pulse Reshaping by Using Cascaded Wavelength Conversion in PPLN Waveguides

Ultra-fast all-optical demultiplexer is required in future high-speed optical time-division-multiplexed (OTDM) transmission systems [1]. As an important nonlinear interaction, the cascaded second-harmonic generation (SHG) and difference frequency generation (DFG) wavelength conversion in quasi-phase-matched (QPM) periodically poled lithium niobate (PPLN) waveguide has many advantages, such as ultra-fast response, low noise, high efficiency, …