The authors study numerically the evolution of speckle fields due to the annihilation of optical vortices after the least-squares phase has been removed. A process with multiple steps of least-squares phase removal is carried out to minimize both vortex density and scintillation index. Statistical results show that almost all the optical vortices can be removed from a speckle field, which finally decays into a quasiplane wave after such an iterative process.
Reference:
Chen, M, Dainty, C and Roux, FS. 2011. Speckle evolution with multiple steps of least-squares phase removal. Physical Review A, vol. 84, 023846, DOI: 10.1103/PhysRevA.84.023846
Chen, M., Dainty, C., & Roux, F. (2011). Speckle evolution with multiple steps of least-squares phase removal. http://hdl.handle.net/10204/5861
Chen, M, C Dainty, and FS Roux "Speckle evolution with multiple steps of least-squares phase removal." (2011) http://hdl.handle.net/10204/5861
Chen M, Dainty C, Roux F. Speckle evolution with multiple steps of least-squares phase removal. 2011; http://hdl.handle.net/10204/5861.
