Four-mode multiplexing and manipulation technologies are reviewed in the context of space-
division multiplexing (SDM) optical communication systems. These are multiplane light …

Photonic technologies offer numerous functionalities that can be used to realize
astrophotonic instruments. The most spectacular example to date is the ESO Gravity …

Trapped in the stringent adiabatic transmission condition of high-order modes, low-loss
fused biconical taper mode selective coupler (FBT-MSC) has long been challenging to …

The monitoring and conversion of photonic orbital angular momentum (OAM) play
fundamental and important roles for both classic and quantum technologies, especially in …

The fulfilment of the adiabatic criterion is indispensable for the realization of a low-loss
photonic lantern (PL), concurrently imposing a stringent restriction on the taper transition …

Optical switches based on phase change materials have enormous application potential in
optical logic circuits and optical communication systems. Integration of all-optical switching …

Optical nanotapers fabricated by tapering optical fibers have attracted considerable interest
as an ultimate platform for high-efficiency light-matter interactions. While previously …

In this study, we experimentally showcase the microfiber evanescent-field photothermal gas
detection by exploiting all-fiber MHz-level frequency shift scheme. Based on the acousto …

We have fabricated an air-cladded mode-group selective photonic lantern, which can (de)
multiplex the first two mode groups of a standard two-mode step-index fiber. Instead of …

In this paper, we investigate semi-classical bound states for logarithmic Schrödinger type
equations with a potential function which has a finite number of singularities of at most …