title: Ultrafast all-optical three-input Boolean XOR operation for differential phase-shift keying signals using periodically poled lithium niobate.
abstract: We propose and demonstrate that periodically poled lithium niobate (PPLN) can act as an ultrafast three-input XOR gate for differential phase-shift keying (DPSK) signals based on cascaded sum- and difference-frequency generation. PPLN-based all-optical three-input Boolean XOR operations for 20 Gbits/s return-to-zero DPSK (RZ-DPSK), 40 Gbits/s RZ-DPSK, and 20 Gbits/s non-return-to-zero DPSK signals are all successfully verified in the experiment.
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.forename: Junqiang
authors.initials: J
authors.lastname: Sun
authors.forename: Xinliang
authors.initials: X
authors.lastname: Zhang
authors.forename: Dexiu
authors.initials: D
authors.lastname: Huang
authors.forename: M M
authors.initials: MM
authors.lastname: Fejer