Conference Agenda

Accurate displacement measurement is critical in areas such as structural health monitoring, bioengineering, and industrial or high-radiation environments. Optical fiber microdisplacement sensors offer significant advantages for these applications, including high precision, reliability, compact size, and flexibility. Their ability to operate under extreme conditions such as elevated temperatures, corrosive atmospheres, or high-pressure environments makes them ideal for integration into complex or confined systems.

This work presents the experimental analysis of single-mode optical fibers (SMFs) modified with transverse through-hole microchannels, fabricated using femtosecond laser processing combined with ultrafast laser-assisted etching. These structures have been experimentally demonstrated as micro-displacement sensing devices.

Pulsed laser synthesis (PLS) of nanomaterials in liquids is a promising technique for synthesizing high-purity nanoparticles. However, its industrial scalability is limited by low production rates. This contribution discusses strategies to enhance nanoparticle yield as accurate control of the temporal dispersion and spatial beam shaping. Additionally, we explore applications of PLS-derived nanoparticles.

3D Stereolithography (SLA) technologies have emerged as a novel methodology to create a wide range of structures in the millimetric scale. Nevertheless, advancements in fields such as microfluidics or medicine rely on the creation of structures featuring micrometric resolution. SLA encounters resolution limits when printing objects within this range of sizes, especially when requiring hollow structures. On its side, femtosecond (fs) laser ablation emerges as a technique overcoming these limitations. The non-linear phenomena involved in the fs laser-matter interaction enable to perform a neat and precise extraction of material, resulting in a laser writing featuring microns. We propose a hybrid approach combining SLA and fs laser ablation to create a multi chamber microfluidic chip where micrometric substructures enable an accurate confinement of the samples.

Green and blue lasers have seen increased use in manufacturing of copper. They offer great advantages compared to common IR lasers especially in additive manufacturing. We tested the feasibility of a low average power femtosecond lasers at a centre wavelength of 515nm for use in micron-precision additive manufacturing of copper particles. A laser beam with an average power of 4W in the near IR was used to achieve second harmonic generation, and the resulting green beam was used to melt copper particles with sizes between 30 and 50µm. Melting of the powder was achieved and small two-dimensional structures were created.

We present a novel near-infrared broadband, flat-top optical

frequency comb spanning 1.6 THz. This comb is generated using an

interband gain medium operated in an ultrafast gain recovery regime within

a unidirectional ring cavity. The remarkable stability of our approach is

evidenced by a 1 Hz RF linewidth. The injected RF signal not only governs

the spectral bandwidth and free spectral range but also tailors the comb’s

spectral shape—a feat achieved by simultaneously injecting multiple

modulation tones. This advanced level of control opens promising avenues

for applications in communication, sensing, and ranging, where precise and

stable frequency lines are essential for performance and reliability