Artificial saturable absorbers (SA) are nonlinear optical devices widely employed in mode‐
locked lasers. Among the artificial SAs are nonlinear polarization evolution (NPE) and …

Optical waveguides fabricated in single crystals offer crucial passive/active optical
components for photonic integrated circuits. Single crystals possess inherent advantages …

High-gain materials and high-quality structures are the two main conditions that determine
the amplification performance of optical waveguides. However, it has been hard to balance …

Laser direct writing (LDW) is versatile in structuring fibers with micro‐sized functional
elements such as fiber Bragg grating (FBG) and backscattering centers by finely …

Bound states in the continuum (BICs), which are localized waves within a continuous
spectrum of radiating waves, have garnered considerable attention due to their …

摘要飞秒激光直写技术因其精度高, 效率高, 脉冲持续时间短, 峰值功率高且能在多种材料中加工
的优点, 已被广泛应用于制备各种集成光电器件, 光学传感器件. **几年, 飞秒激光直写光波导 …

Glass-based photonic and electronic chips are attractive due to the high transparency,
strong mechanical strength and biocompatibility of such substrates, or where low-loss …

In this paper, in situ multiple scans of a femtosecond laser are employed to optimize the
refractive index distribution in a glass optical waveguide. The emergence of second bright …

We present a novel variant of the on-chip tilted waveguide Bragg grating (TWBG), wherein
the tilted grating is constructed through the tilted stacking of 20 sets of line-by-line sub …

To produce a three-dimensional (3D) energy-controllable focal spot array with an extended
depth of focus (EDOF), We propose a pure phase modulation that combines a two …