Measuring,processing,and generating partially coherent light with self-configuring optics  

作　　者：Charles Roques-Carmes Shanhui Fan David A.B.Miller 

机构地区：[1]E.L.Ginzton Laboratory,Stanford University,348 Via Pueblo,Stanford,CA 94305,USA

出　　处：《Light(Science & Applications)》2024年第11期2726-2733,共8页光（科学与应用)（英文版）

基　　金：supported by a Stanford Science Fellowship;S.F.and D.A.B.M.acknowledge support by the Air Force Office of Scientific Research(AFOSR,grant FA9550-21-1-0312);D.A.B.M.also acknowledges support by the Air Force Office of Scientific Research(AFOSR,grant FA9550-23-1-0307).

摘　　要：Optical phenomena always display some degree of partial coherence between their respective degrees of freedom.Partial coherence is of particular interest in multimodal systems,where classical and quantum correlations between spatial,polarization,and spectral degrees of freedom can lead to fascinating phenomena(e.g.,entanglement)and be leveraged for advanced imaging and sensing modalities(e.g.,in hyperspectral,polarization,and ghost imaging).Here,we present a universal method to analyze,process,and generate spatially partially coherent light in multimode systems by using self-configuring optical networks.Our method relies on cascaded self-configuring layers whose average power outputs are sequentially optimized.Once optimized,the network separates the input light into its mutually incoherent components,which is formally equivalent to a diagonalization of the input density matrix.We illustrate our method with numerical simulations of Mach-Zehnder interferometer arrays and show how this method can be used to perform partially coherent environmental light sensing,generation of multimode partially coherent light with arbitrary coherency matrices,and unscrambling of quantum optical mixtures.We provide guidelines for the experimental realization of this method,including the influence of losses,paving the way for self-configuring photonic devices that can automatically learn optimal modal representations of partially coherent light fields.

关 键 词：COHERENT MODAL GENERATING 

分 类 号：TH74[机械工程—光学工程]