The next generations of wireless communications are promising high capacity, low latency,
and high throughput, enabled by millimeter wave spectrum. Beamforming and beam …

Low-loss and compact optical waveguides are key for realizing various photonic integrated
circuits with long on-chip delay lines, such as tunable optical delay lines, optical coherence …

A tunable optical delay line (ODL) featuring high switching speed and low optical loss is
highly desirable in many fields. Here, based on the thin-film lithium niobate platform, we …

Chip-scale programmable optical signal processors are often used to flexibly manipulate the
optical signals for satisfying the demands in various applications, such as lidar, radar, and …

This research presents a highly accurate and easy-to-implement method to characterize the
complex Bloch modes propagating along optical chain waveguides with three-dimensional …

Optical delay lines control the flow of light in time, introducing phase and group delays for
engineering interferences and ultrashort pulses. Photonic integration of such optical delay …

An optical true time delay line (OTTDL) is an essential component in optical signal
processing. A Bragg grating structure is usually employed in OTTDL design, which makes it …

Silicon subwavelength grating waveguides enable flexible design in integrated photonics
through nano-scale refractive index engineering. Here, we explore the possibility of …

For the access of innovative and upgraded facilities, cellular and smartphone technology
have evolved exponentially at an unprecedented and daunting pace during the last decade …

The integrated optical delay line plays a crucial role in microwave photonic chips.
Continuous tunability is a growing trend in filtering and beamforming techniques of …