title: Experimental demonstration on two-input optical high-base hybrid doubling and subtraction functions in graphene.
abstract: Optical signal processing is considered to be a promising technique to overcome the speed limitation of electronics and accelerate next-generation high-speed optical networks. Among various optical signal processing operations, optical arithmetic functions have attracted increasing interest. Here, by exploiting the degenerate four-wave mixing progress in graphene and adopting (differential) quadrature phase-shift keying signals, we experimentally demonstrate 10 Gbaud two-input (A, B) hybrid quaternary arithmetic functions of doubling and subtraction (2A-B, 2B-A) in the optical domain. The measured optical signal-to-noise ratio penalties at a bit-error rate of 2 × 10⁻³ are about 7.4 dB for 2A-B and 7 dB for 2B-A.
authors.forename: Andong
authors.initials: A
authors.lastname: Wang
authors.forename: Xiao
authors.initials: X
authors.lastname: Hu
authors.forename: Long
authors.initials: L
authors.lastname: Zhu
authors.forename: Mengqi
authors.initials: M
authors.lastname: Zeng
authors.forename: Lei
authors.initials: L
authors.lastname: Fu
authors.forename: Jian
authors.initials: J
authors.lastname: Wang