Theoretical Study Of Phase-sensitive Parametric Amplification Based On Silicon Graphene-oxide Hybrid Waveguide

With the development of science and technology,traditional electrical communication methods have been unable to meet people’s needs in terms of data capacity and speed.Researchers look forward to the emergence of optical communication systems with ultra-long optical bandwidth,higher spectral efficiency,and advanced modulation formats.All-optical signal processing technology based on phase-sensitive parametric amplification just solves these problems.Phase sensitive amplifier（PSA）can be widely used for low noise amplification and wavelength conversion,and even higher-order modulation format signal regeneration.Silicon-based waveguides have good mode-field limiting functions and extremely large nonlinear coefficients,and can be combined with various new materials.They are the most commonly used platform for implementing PSA.The main work of this paper is based on silicon graphene-oxide hybrid waveguide PSA to achieve all-optical phase regeneration of high-order modulation format signals.The research contents include:1.Introduced the research progress of silicon waveguides and the research background of PSA at home and abroad,the principle and application of nonlinear optical effects when waves propagate in silicon-based waveguides.2.Derived from the Maxwell’s equations for the transmission of waves in the waveguide,derive general transmission equation for waves,the nonlinear Schro?dinger equation.The four-wave mixing PSA model working in different working modes and the corresponding coupled wave calculation formula and application research are mainly explained.3.A novel grooved silicon graphene-oxide hybrid waveguide is designed using graphene oxide,silicon,silicon dioxide and organic resin NOA-65 UV materials,which is highly nonlinear materials.By optimizing the waveguide structure,the nonlinear coefficient of the hybrid waveguide is 10⁶W^-1m^-1,and the second-order dispersion is flat in the wavelength range of 1340nm to 1780nm,and the waveguide length is 35μm,which meets the requirements of integrated optics.The designed PSA is used to realize the phase regeneration of the quadrature phase shift keying（QPSK）signal.The constellation of QPSK signal and the error vector magnitude（EVM）is used to quantitatively evaluate the regeneration performance of the PSA.4.Utilizing the highly nonlinear materials graphene-oxide,silicon,silicon dioxide and organic compound PMMA materials to design a slotted silicon oxide mixed waveguide.The mode field distribution when the light is transmitted in the waveguide is analyzed.By optimizing the waveguide structure,the dispersion is flat in the wavelength range of 1320-1850nm and the waveguide length is only 55μm.Solving the coupled wave equation,the phase amplitude gain function and phase transfer function at different pump powers are obtained.The results show that when the pump power is 50m W,the peak gain of the signal reaches 25d B.Based on the silicon graphene-oxide hybrid waveguide PSA,the phase regeneration of the quadrature amplitude modulation（QAM）signal is realized,and the star-8QAM signal constellation,EVM and optical signal-to-noise ratio （OSNR）quantitatively evaluates the PSA’s phase regeneration capability.