中文摘要：

理论分析并实验研究了一种基于双平行马赫曾德调制器（DP-MZM）具有动态光载波边带比（OCSR）调谐能力的光单边带（OSSB）调制实现方案，方案利用DP-MZM内部集成的三个独立的调制单元，分别实现OSSB调制、光载波移相和光信号干涉，最终，仅需改变调制器的一个偏置点，就实现了OCSR的动态调谐，实验得到了小信号调制（调制系数m=0.2）下， OCSR的可调范围？20.8-23.5 dB.并分析了OCSR与射频功率之间的对应关系，通过本方案调谐至最佳的OCSR可提高模拟光链路接收灵敏度.

英文摘要：

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.