In this Letter, a four-channel silicon photonic mode-division-multiplexing (MDM) and wavelength-division multiplexing (WDM) transmitter chiplet is proposed over a 1.65 mm2 footprint, utilizing add-drop micro-ring modulators to sim

Research in the ocean places high demands on chips’ robustness, speed, and energy consumption. Diffractive neural networks (DNNs) enable direct optical image processing at light speed, with great potential for underwater applicati

A multiplier-simplified adaptive channel equalization scheme is proposed for short-reach digital coherent optical transmission. The data processing is based on hardware-efficient logic, such as a shifter and adder unit, rather tha

We propose a novel target-type fiber Bragg grating (FBG) flowmeter based on a cascaded cantilever beam with a simple structure in this paper. Such a cascaded cantilever beam consists of two sections with constant strength but diff

In this work, we demonstrate a single-photon lidar based on a polarization suppression underwater backscatter method. The system adds polarization modules at the transmitter and receiver, which increases the full width at half-max

In this Letter, we propose a pixel-excitation-gating technology for high-sensitivity nonlinear imaging excited by femtosecond pulses at a GHz repetition rate, which can enhance the signal quality of nonlinear imaging. To validate

It is difficult to extract targets under strong environmental disturbance in practice. Ghost imaging (GI) is an innovative anti-interference imaging technology. In this paper, we propose a scheme for target extraction based on cha

Free manipulation of electromagnetic waves in the terahertz (THz) band based on metasurface functional devices has been the focus of research in recent years. Among these devices, active metasurfaces have generated extensive resea

We propose a high-sensitivity spin polarization detection scheme based on optical amplitude modulation in atomic co-magnetometers, which is different from the traditional configuration. A linearly polarized laser with intensity mo

Chirped Bragg grating is a powerful dispersion compensator. It has the advantages of a broad working bandwidth, a simple structure, and a compact footprint. However, previously reported integrated silicon chirped Bragg gratings re

In this work, polarization mode dispersion (PMD) in polarization-maintaining (PM) fibers, to the best of our knowledge, is first proposed and experimentally proved to be responsible for severe spectral modulations in ultrafast PM

Statistical properties of the erbium-doped random fiber laser (ERFL) play an important role in studying its physical attributes and advancing profound applications. Thus, there is an obvious need for thorough characterization and

A hybrid cavity structure based on individual laser diode integrating coherent beam combining (CBC) and spectral beam combining (SBC) is demonstrated. The CBC structure is used to enhance laser output power while optimizing beam q

We experimentally demonstrate a Yb-doped all-fiber mode-locked laser based on the Mamyshev mechanism. The entire experimental setup operates only by injecting pump powers and adjusting polarization controllers (PCs), which realize

A mode-switchable femtosecond vortex laser is innovatively developed in a Yb:KGW-based resonator. The unique structure is designed to achieve a transition between different transverse modes. In a normal cavity, 416 fs TEM00 mode i

In this paper, we experimentally investigate the tuning characteristics of laser modes for an ultrahigh-Q Er3+-doped microbottle resonator (MBR) based on the whispering gallery mode (WGM). Thanks to the optimized Er3+ doping techn

In this Letter, we demonstrate the transmission of fifth-generation new radio (5G NR) signals over a fiber-millimeter-wave (mmWave)-fiber mobile fronthaul system in the 75–110 GHz band for an ultra-dense small cell network. The sy

We theoretically demonstrate electrically controlled light focusing using a tunable metasurface employing thin film lithium niobate (TFLN). The designed metasurface features a high-quality factor guided-mode resonance with an elec

A designed arrangement of nanometer-sized holes in a thin dielectric film is presented to create a gradient-index plasmonic metasurface Gutman lens (PMGL) for controlling surface plasmon polaritons. We introduce two distinct desig

The fundamental understanding of exciton physics and the anisotropic behavior of excitons and charge carriers in perovskite materials are pivotal to controlling the orientation of emission dipoles and the polarization of photocurr

The lightwave field possesses several dimensional properties, including amplitude, spectrum, phase, and polarization. Multi-dimensional measurements of lightwaves have diverse applications ranging from remote sensing to analytical