Axicon is a versatile optical element for forming a zero-order Bessel beam, including high-
power laser radiation schemes. Nevertheless, it has drawbacks such as the produced …

The flat endface of an optical fiber tip is an emerging light-coupled microscopic platform that
combines fiber optics with planar micro-and nanotechnologies. Since different materials and …

Micro-optics are widely used in numerous applications, such as beam shaping, collimation,
focusing and imaging. We use femtosecond 3D printing to manufacture free-form micro …

Non‐Gaussian beam profiles such as Bessel or annular beams enable novel approaches to
modifying materials through laser‐based processing. In this review paper, properties …

The first article by Turunen and Friberg deals with a class of fields with propagation-invariant
properties such as the optical intensity distribution. Coherent and partially coherent …

Bessel beams (BBs) have gained prominence thanks to their diffraction-free propagation
and self-healing properties. These beams are conventionally generated using different …

Ultrafast laser materials processing has undergone an important change with the
development of non-diffracting beams. These beams enable overcoming many of the …

Functionalized optical fiber tips featuring miniature sizes and diverse functions have broken
the limitations of traditional optical fiber with fixed shapes and single materials, significantly …

Common-path optical coherence tomography (CPOCT) is known to reduce group velocity
dispersion and polarization mismatch between the reference and the sample arm as both …

Diffraction patterns formed by axicons with different tip (vertex) angles are analytically and
numerically investigated. Results show that the axicon (or tapered dielectric probe) can form …