Coherent Polarization Beam Combining Approach Based on Polarization Controlling in Fiber Devices

A novel, scalable coherent polarization beam combining (CPBC) approach based on polarization controlling in fiber devices has been proposed and experimentally verified. By actively controlling the polarization state of the combined beam, the proposed CPBC approach can combine imbalanced input beams with arbitrary power ratios efficiently. A series of experiments are carried out to validate the feasibility and the flexibility of the proposed CPBC approach in the number and power ratio of the input beams. We believe that the proposed CPBC approach, in this letter, has great potential in certain applications of combination, where the numbers of the individual beams are not binary, the individual beams are power imbalanced, or the optical powers of the individual beams are fluctuant.