All-optical dual-direction half-subtracter based on sum-frequency generation

作者：Wang Jian; Sun Junqiang^*; Sun Qizhen; Zhang Xinliang; Huang Dexiu

来源：Optics Communications, 2008, 281(4): 788-792.

DOI：10.1016/j.optcom.2007.10.061

• nonlinear optics
• all-optical logic gates
• dual-direction half-subtracter
• sum-frequency generation (SFG)
• periodically poled lithium niobate (PPLN)

We report a simple method to realize all-optical dual-direction half-subtracter at 40 Gb/s based on sum-frequency generation (SFG) using only one periodically poled lithium niobate (PPLN) waveguide. The SFG process generates the Borrow outputs and the combination of the outputs from PPLN after SFG results in the Difference. The operation performance of the proposed scheme is simulated, including eye diagrams, Q-factor, extinction ratio, and tunability. For different input optical powers, the length of the PPLN waveguide is optimized.

• 出版日期2008-2-15
• 单位华中科技大学