Investigation On Phase Sensitive Amplification And Its Applications

With the appearance and commercialization of fiber and erbium doped fiber amplifier,optical fiber communication systems have developed rapidly.At the optical network nodes,nonlinear effects-based all optical signal processing can avoid the high cost and complexity caused by optic-electric-optic conversion,improve transmission capacity and reduce system power consumption.These advantages are obviously significant for the information transmission and exchange in the age of big data.As an essential nonlinear effect,phase sensitive amplification(PSA)has been widely used for all optical signal processing.In this thesis,originated from the general PSA theory,the PSA theoretical models for several kinds of media and full field of multi-dimensions are built.Benefitted from these models,the design for nonlinear devices and optimization for input conditions are guided,and several all optical signal processing functionalities based on PSA are proposed and realized,including phase regeneration,logic gate and modulation format conversion.The main contents of this thesis can be concluded as follows:(1)The PSA theory is fully investigated.Originated from the wave equation,the general PSA theoretical model and corresponding approximately analytical solution are derived.The general model is improved for several kinds of media according to the characters of the active and passive nonlinear devices.The general theory is extended for multi-dimensional multiplexed systems with the full-field PSA theoretical models for wavelength,polarization and mode dimensions built.(2)The phase regeneration(PR)based on PSA for phase-shift keying(PSK)signals is thoroughly investigated.The PR for single channel differential phase shift keying(DPSK)and quadrature phase shift keying(QPSK)signals is numerically analyzed and demonstrated based on scalar dual pump nondegenerate PSA in highly nonlinear fiber(HNLF),with the optimization for device parameters and input conditions,good PR performance is achieved.The PR for polarization-division multiplexing(PDM)signals is proposed and numerically demonstrated based on vector dual pump nondegenerate PSA in HNLF,the PR without polarization crosstalk for PDM DPSK and QPSK signals is successfully realized by optimizing the input conditions,besides,the phase noise tolerance of the scheme is also analyzed.The PR scheme for mode-division multiplexing(MDM)signals is proposed and numerically demonstrated based on intra-mode dual pump degenerate PSA in a multimode silicon waveguide,with the optimization for device sizes and input conditions,the PR with ultralow mode crosstalk for dual mode signals is realized,and the phase noise tolerance of the proposed scheme is further investigated.The PR for wavelength-division multiplexing(WDM)signals is proposed and numerically demonstrated based on scalar dual pump nondegenerate PSA in HNLF,good PR performance is achieved by optimizing the input conditions.(3)The all-optical logic gate based on PSA is investigated theoretically and experimentally.A scheme to realize nonlinear interference multicasting is proposed and experimentally demonstrated based on single-stage four wave mixing in a single-mode silicon waveguide,with the optimization of waveguide sizes and input conditions,the interference result is experimentally obtained at 4 different wavelengths,furthermore,the logic exclusive-OR gate multicasting based on the proposed scheme for both on-off keying(OOK)and binary-PSK(BPSK)formats is realized in simulation.A logic NOT gate scheme for OOK format based on single pump nondegenerate PSA is proposed and numerically demonstrated in HNLF,with the optimization of the input conditions,the logic NOT gate result is obtained at 2 different wavelengths.(4)The modulation format conversion based on PSA is investigated.The modulation format conversion from BPSK to conventional OOK based on single pump nondegenerate PSA is proposed,with the optimization for device parameters and input conditions,the scheme is demonstrated based on both passive and active nonlinear devices,i.e.HNLF and semiconductor optical amplifier(SOA).