Optical coherence elastography (OCE) can quantitatively obtain the viscoelasticity of tissues using rheological models and is widely applied to the clinical diagnosis of diseases. However, commonly used rheological models in OCE d

The retroreflector based on a gradient metasurface can reflect electromagnetic (EM) waves to the source, and it is small in size and lightweight. However, even if the previous retroreflectors can be used for angle adaptation, the

We experimentally demonstrate the transmission of discrete multi-tone (DMT) millimeter-wave (mm-wave) signals over a 1.2-km distance at the D-band (110–170 GHz) in a cost-effective intensity-modulation and direct-detection (IM/DD)

We conducted an experimental study on an off-on fluorescence optical fiber probe utilizing graphitic carbon nitride quantum dots (g-CNQDs) -doped hydrogel for chloride ion detection. It resulted in fluorescence quenching after g-C

The photobleaching (PB) effect of bismuth active center (BAC)-related silicon (BAC-Si) in the bismuth- and erbium-codoped optical fiber (BEDF) under repeated pumping was studied. The results demonstrated that the irreversible PB c

We propose a multi-tap look-up-table (LUT)-based error-tracking decision feedback equalizer with partial unrolling (ET-DFE-PU) algorithm to improve log-likelihood ratio (LLR) quality with error propagation. We introduce an error-t

Computational ghost holography is a single-pixel imaging technique that has garnered significant attention for its ability to simultaneously acquire both the amplitude and phase images of objects. Typically, single-pixel imaging s

A highly sensitive temperature sensor was developed using a thin-walled SiO2 hollow microrod resonator (SHMR) to excite Lorentz resonance and Fano resonance. The SHMR has a high Q factor (3.16 × 107) and concise resonance modes. M

A novel Mach–Zehnder interferometer (MZI) sensor based on multiple supermode interferences that can be used for dual-parameter measurements of temperature and strain is proposed and demonstrated. The MZI is made by splicing a coup

Coherent lidar (CL) addresses existing constraints in CL data products by enabling simultaneous observation of multiple meteorological parameters such as cloud height, extinction coefficient, aerosol concentration, and wind field

A diode-pumped mode-locked (ML) Tm,La:CaF2 crystal laser is reported in this paper. This laser system delivers stable continuous-wave ML pulses, achieving a maximum output power of 143 mW at a fundamental frequency of 96.2 MHz. Mo

Ultrastable continuous-wave lasers are one of the important elements for space-based gravitational wave detection. Here we present a Pound–Drever–Hall laser frequency-locked system based on a field-programmable gate array, demonst

We demonstrated a divided pulse amplification of burst pulse trains. The intraburst rate is 1 GHz, and the burst rate ranges from 1.5 kHz to 15 MHz. Under the pump power of 100 W, the burst pulse energy is adjustable from 2.2 µJ t

In this paper, a digital laser with a dual-cavity configuration for the pattern control of a Q-switched pulsed laser is presented. The dynamic pattern control of the pulsed laser from the primary cavity is generated and controlled

We propose a novel automatic phase-matching method for generating optical frequency combs using cascaded electro-optic modulators. By analyzing the power changes of different spectral lines, our method enables real-time monitoring

Orbital angular momentum (OAM) waveguides are critical for multi-channel photonic-on-chip applications. However, current large-mode-area waveguides pose a challenge for OAM device miniaturization. Here, a novel hybrid plasmonic wa

Recently, polarization conversion based on the equivalent magnetic field of Weyl semimetals (WSMs) has gained significant attention. Based on a twin WSM-layer structure, we transplant the concept of twist from Twistronics to obtai

Lithium-niobate-on-insulator (LNOI) chips have shown outstanding performance in various photonic devices including modulators, lasers, nonlinear converters, and quantum sources. LNOI-based edge couplers are quite important for fur

The development of nonlinear optical materials with strong multiphoton absorption (MPA) is crucial for the design of ultrafast nonlinear optical devices, such as optical limiters and all-optical switchers. In this study, we presen

We experimentally demonstrate a continuous-wave (CW) injection-seeded cascaded optical parametric amplifier (OPA) for generating femtosecond pulses in the NIR-I spectral region. Utilizing a cascaded two-stage configuration, our sy

Zinc sulfide (ZnS) has promising linear and nonlinear optical properties and has shown important applications in military and modern devices. In this work, coupled with the chemical vapor deposition (CVD) method and hot isostatic

We propose a promising method to develop flexible, compact, and tunable light-activated film diffractive optical elements (FDOEs) with exceptional diffraction efficiency, by integrating liquid crystal (LC) geometric phase-based di

Under a specified loss condition, the resonant mode in a three-turn lossy microfiber coil resonator exhibits periodic evolution among normal resonance, white-light cavity effect, and resonance mode splitting in response to alterat

For bicolor regulation in laser protection compatible with visible light stealth, a metal–dielectric–enhanced reflection asymmetric Fabry–Perot structure is proposed that has high reflectance at the laser wavelength and the color