A multimode optical receiver for free space optical communications (FSOC) based on a
photonic lantern and adaptive optics coherent beam combining (CBC) of the lantern's single …

Few-mode fiber is a significant component of free-space optical communication at the
receiver to obtain achievable high coupling efficiency. A theoretical coupling model from the …

We investigated the performance of mode diversity reception of a polarization-division-
multiplexed (PDM) signal with few-mode-fiber (FMF) coupling for high-speed free-space …

Free-space optical communications links have the perpetual challenge of coupling light from
free-space to a detector or fiber for subsequent detection. It is especially challenging to …

We utilize aperture diversity combined with multiple-mode receivers and multiple-input-
multiple-output (MIMO) digital signal processing (DSP) to demonstrate enhanced tolerance …

Photonic lanterns are being evaluated as a component of a scalable photon counting real-
time optical ground receiver for space-to-ground photon-starved communication …

Bit-error rate (BER) performance of free-space optical communication (FSO) systems is
compromised by pointing errors. Few-mode fiber (FMF) based receiver emerges as a …

Custom coherent architectures can provide many advantages for FSO communications
systems through co-development of integrated photonics, ASIC-or FPGA-based DSP …

Photonic lanterns provide an efficient way of coupling light from a single large-core fiber to
multiple small-core fibers. This capability is of interest for space to ground communication …

This study proposes a method to reduce link loss in near-ground space laser communication
with fiber-nutation-based mutual coupling. We designed a transmit-receive coaxial laser …