论文部分内容阅读
提出一种基于3×3耦合器干涉信号的全新被动解调方案,方案基于简单的数学运算,利用2路干涉信号,消除了单路信号的不灵敏区,不需要校准。与相位生成载波技术(PGC)和过去基于3×3耦合器的解调方案相比,不需要载波、滤波器,不需要3×3耦合器有严格的分光比,而且更加具有实用性。最后通过使用稳定化光源和采样率满足fs Aω情况下的测速实验,验证了方案的正确性和可行性。
A new passive demodulation scheme based on 3 × 3 coupler interference signals is proposed. Based on a simple mathematical operation, the scheme uses 2-way interference signals to eliminate the insensitive zone of single-channel signals and does not require calibration. Compared with the PGC and the past 3 × 3 coupler-based demodulation scheme, the carrier and the filter are not needed. The 3 × 3 coupler is not required to have a strict splitting ratio and is more practical. At last, the correctness and feasibility of the scheme are verified by using the stabilized light source and sampling rate to meet the speed test of fs Aω.