2 papers
physics.optics2026
OAM modes characteristics analysis and low-loss transmission based on topological confinement
Yifan He, Xuchen Hua, Lei Shen +4
The topological confinement is a new mechanism that allows the transmission of cutoff orbital angular momentum (OAM) modes with negligible loss in ring-core fibers (RCFs) and provi…
math.OC2022
Tight Error Bounds for the Sign-Constrained Stiefel Manifold
Xiaojun Chen, Yifan He, Zaikun Zhang
The sign-constrained Stiefel manifold in is a segment of the Stiefel manifold with fixed signs (nonnegative or nonpositive) for some columns of the matrice…