Using bidirectional modulation of 2-Ch phase modulator as basis for nonlinear distortion compensatio

• 作 者: 牛剑 徐坤 谢小军 戴一堂 李建强 纪越峰 林金桐
• 机 构: State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts
• 出 处: Chinese Optics Letters
• 发表日期: 2013年08期
• 关键词: modulator bidirectional analog photonic distortion links compensation SFDR cance

We propose a third-order intermodulation distortion(IMD3) compensation scheme based on the bidirectional modulation of 2-Ch phase modulator(PM).We realize the destructive combination of IMD3 by using different modulation efficiencies and appropriately adjusting the input optical power ratio to satisfy a fixed relationship with modulation efficiency.The primary advantage of this scheme is that out-of-phase IMD3 is introduced using only one 2-Ch PM,thereby resulting in the cancellation of IMD3.Up to 27-dB suppression in IMD3 is experimentally demonstrated-a feature that will be useful in low-distortion analog optical transmission.

We propose a third-order intermodulation distortion (IMD3) compensation scheme based on the bidirectional modulation of 2-Ch phase modulator (PM). We realize the destructive combination of IMD3 by using different modulation efficiencies and appropriately adjusting the input optical power ratio a fixed relationship with modulation efficiency. The primary advantage of this scheme is that out-of-phase IMD3 is introduced using only one 2-Ch PM, resulting in the cancellation of IMD 3. Up to 27-dB suppression in IMD3 -a feature that will be useful in low-distortion analog optical transmission.