title: Graphene-assisted nonlinear optical device for four-wave mixing based tunable wavelength conversion of QPSK signal.
abstract: We fabricate a nonlinear optical device based on a fiber pigtail cross-section coated with a single-layer graphene grown by chemical vapor deposition (CVD) method. Using such graphene-assisted nonlinear optical device, we experimentally demonstrate tunable wavelength conversion of a 10 Gbaud quadrature phase-shift keying (QPSK) signal by exploiting degenerate four-wave mixing (FWM) progress in graphene. We study the conversion efficiency as functions of the pump power and pump wavelength and evaluate the bit-error rate (BER) performance. The observed optical signal-to-noise ratio (OSNR) penalties for tunable QPSK wavelength conversion are less than 2.2 dB at a BER of 1 × 10(-3).
authors.forename: Xiao
authors.initials: X
authors.lastname: Hu
authors.forename: Mengqi
authors.initials: M
authors.lastname: Zeng
authors.forename: Andong
authors.initials: A
authors.lastname: Wang
authors.forename: Long
authors.initials: L
authors.lastname: Zhu
authors.forename: Lei
authors.initials: L
authors.lastname: Fu
authors.forename: Jian
authors.initials: J
authors.lastname: Wang