Optical single sideband modulation with continuously tunable optical carrier-to-sideband ratio by employing a dual-parallel Mach-Zehnder modulator

作者：Li Jing; Ning Ti Gang^*; Pei Li; Jian Wei; You Hai Dong; Chen Hong Yao; Zhang Chan; Li Chao

来源：Acta Physica Sinica, 2013, 62(22): 224210.

DOI：10.7498/aps.62.224210

• optical communications
• microwave photonic
• optical carrier-to-sideband ratio
• single-sideband modulation

We propose and demonstrate an optical single sideband (OSSB) modulation approach with continuously tunable optical carrier-to-sideband ratio (OCSR) theoretically and experimentally. In the proposal, one dual-parallel Mach-Zehnder modulator (DP-MZM) acts as a key component. By properly setting the modulator, three separate sub-modulators inside the DP-MZM can be used to realize the OSSB modulation, optical carrier phase-shift, and lightwave interference. By adjusting the bias voltage of one sub-modulator, the OCSR can be tuned continuously. In the experiment, the tuning range of OCSR is found to be between -20.8 dB and 23.5 dB at modulation index m = 0.2. We also analyze the relationship between the OCSR and RF power after detection. It is found that with properly adjusting the OCSR, the receiver sensitivity can be greatly improved.

• 出版日期2013-11
• 单位北京交通大学