【摘要】 设计了一种利用载波相移双边带调制(CPS-DSB)系统实现宽带频率可调谐的光电振荡器(OEO)。其中CPS-DSB系统由3dB耦合器、π偏置Mach-Zehnder调制器(MZM)及可变移相器(VPS)组成,并与线性啁啾光纤Bragg光栅(LCFBG)完成可调谐微波光子滤波器(MPF)的功能。通过调整VPS的相位可完成MPF中心频率的调谐,进而实现OEO振荡频率的调谐功能。理论分析和仿真实验表明,通过调谐VPS的相位可实现振荡频率大范围调谐。更多还原

【Abstract】 A wideband frequency-tunable optoelectronic oscillator(OEO)is designed based on carrier phase-shifted double-sideband modulation(CPS-DSB)system,which consists of two 3dB couplers,aπ-bias Mach-Zehnder modulator and a variable phase shifter(VPS).Furthermore,a tunable microwave photonic filter(MPF)can be implemented by a carrier phase-shifted double-sideband modulation(CPSDSB)system and a linear chirped fiber Bragg grating(LCFBG).By simple adjusting the phase of the VPS,the central frequency of the MPF is changed and the oscillation frequency of the OEO can be tuned.A detailed theoretical analysis is performed,which is verified by simulations.A large frequencytunable range can be achieved by tuning the phase of the VPS.更多还原