对铒镱共掺微环谐振器的放大特性进行了理论分析,给出了器件的传递函数和功率增益的公式。在抽运光波长为0.98 μm、信号光中心工作波长为1.55 μm的情况下,分析了抽运光功率、信号光功率、铒镱掺杂浓度、微环与信道间的振幅耦合比率对放大器放大特性的影响,给出了上下信道的传输光谱,并对其结构进行了优化设计。模拟结果表明,与同等长度的直条形铒镱共掺波导放大器相比,该器件可获得更高的信号光增益,选取Pp0 = 8 mW,Ps0 =36.5 μW,NEr =1×1026 m-3,NYb =3×1027 m-3时,该器件可容易地获得11.6 dB以上甚至高达60 dB的信号光功率增益。这种强放大功能的铒镱共掺微环谐振型放大器,将更有利于器件在尺寸上的小型化、集成化。

For an Er3+/Yb3+ co-doped microring resonator, formulas of the transfer function and output power gain are presented, transmission characteristics are analyzed, and simulation is performed. Around the pumping wavelength of 0.98 μm and the central signal wavelength of 1.55 μm, the effects of the pump power, signal power, dopant concentration and amplitude coupling ratio on the output power gain are investigated, the transmission spectra are presented and the optimization of the device is carried out. Simulated results show that the output power gain of this device is much larger than those of the Er3+/Yb3+ co-doped straight waveguide amplifier with the same waveguide length. In the case of the pump power of 8 mW, signal power of 36.5 μW, Er3+ ion concentration of 1×1026 m-3, and Yb3+ ion concentration of 3×1027 m-3, the signal power gain of the device can reaches 11.6 dB and even 60 dB. Also, this device is propitious to the denser integration in the opto-electronic circuits.