摘要： In this paper, we introduce a new kind of photon-added entangled coherent states (PA-ECSs), by performing repeatedly a f -deformed photon-addition (DPA) operation, A? = f (?n)a?, on each mode of the entangled coherent states (ECSs), |Ψ±(α)(cid:3). By choosing a particular deformation function f (?n), we study how the entanglement properties can be enhanced by DPA operation. As a result, we show that both the single and two-mode DPA operation can be used to improve the entanglement of |Ψ+(α)(cid:3), where the e?ects of improvement by two-mode DPA operation are more prominent than those by single-mode DPA operation, in any amplitude regime. Moreover, our results show there exists a family of coherent amplitudes |α| such that the two-mode DPA operation preserves the maximal entanglement of the odd ECSs |Ψ?(α)(cid:3), where the non-deformed photon-addition operation a? suppresses the entanglement amount. Finally, a theoretical scheme for the physical generation of the introduced states based on a Jaynes-Cummings model with intensity-dependent couplings is proposed.