title: Graphene-silicon microring resonator enhanced all-optical up and down wavelength conversion of QPSK signal.
abstract: We fabricate a nonlinear optical device based on graphene-silicon microring resonator (GSMR). Using such graphene-assisted nonlinear optical device, we experimentally demonstrate up and down wavelength conversion of a 10-Gbaud quadrature phase-shift keying (QPSK) signal by exploiting degenerate four-wave mixing (FWM) progress in the fabricated GSMR. We study the conversion efficiency as a function of the pump power. In addition, the resonant wavelength of GSMR is tuned by changing the temperature from 20°C to 40°C. We evaluate the bit-error rate (BER) performance for up and down wavelength conversion. The observed optical signal-to-noise ratio (OSNR) penalties for QPSK up and down wavelength conversion are less than 1.4 dB at a BER of 1 × 10-3. The BER performance as a function of the pump power for up wavelength conversion is also assessed. The minimum OSNR penalty is less than 0.8 dB when the pump power is 13.3 dBm.
authors.forename: Xiao
authors.initials: X
authors.lastname: Hu
authors.forename: Yun
authors.initials: Y
authors.lastname: Long
authors.forename: Mengxi
authors.initials: M
authors.lastname: Ji
authors.forename: Andong
authors.initials: A
authors.lastname: Wang
authors.forename: Long
authors.initials: L
authors.lastname: Zhu
authors.forename: Zhengsen
authors.initials: Z
authors.lastname: Ruan
authors.forename: Yi
authors.initials: Y
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Wang