Linearization of Mach-Zehnder modulator using microring-based all-pass filter

• 作 者: 杨建义 王帆 江晓清 屈红昌 吴亚明 王明华 王跃林
• 机 构: Department of Information & Electronic Engineering Zhejiang University,Hangzhou 310027,State Key La
• 出 处: Chinese Optics Letters
• 发表日期: 2005年06期
• 关键词: modulator resonator linearity suppressed applying properly fitting deviation qua

By applying the microring resonator to the Mach-Zehnder (MZ) optical modulator and employing the super-linear phase change characteristic of the all-pass filter, the sublinear modulation curve of the conventional MZ modulator is highly linearized. With properly controlled power coupling between the microring and the arm of the MZ modulator, the third-order distortion can be suppressed. If the transmission coefficient is set between 0.25 and 0.42, the linearity range larger than 90% can be easily achieved. The maximum linearity range is even up to 99.5%.

By applying the microring resonator to the Mach-Zehnder (MZ) optical modulator and employing the super-linear phase change characteristic of the all-pass filter, the sublinear modulation curve of the conventional MZ modulator is highly linearized. the microring and the arm of the MZ modulator, the third-order distortion can be suppressed. If the transmission coefficient is set between 0.25 and 0.42, the linearity range is even up to 99.5%.