Analysis of passive compensation for linear and non linear SOP on standard single mode optical fiber

We report experimental result on passive compensation on standard single mode optical fiber. The states of polarization (SOP) were analysed and the six main states normally used for QKD system are investigated. Passive control of SOP approach seems very unpractical, but through simple setup, compensation at each communicating arm seems to be a potential method. The results show that the SOP state remains similar to the source after compensation and the passive compensation setup compensate all 6 SOPs source value over time. We achieved to maintain the related stoke value (S₁, S₂, S₃) at each SOP state above 93%.