PhotonicsViews最新文献

Raman spectroscopy is a well-known technique to study different materials and determine their chemical composition. It is based on the inelastic scattering of light and provides a unique spectrum for the sample under study. The advances in lasers and detectors, their combination with imaging systems and the discovery of new phenomena have expanded the use of this technique in several research fields. In the particular case of biology and life sciences, it has been used to provide chemical and compositional information on plant and animal tissues, cells, biofluids, etc., with the advantage that the presence of water molecules normally does not cause interference in the measured signal.

Our world is constantly facing a wide variety of social challenges — currently, issues such as climate change, security, demographic change, and resource conservation are of significant importance and show an acute need for action. Among other things, disruptive technologies are needed to tackle such problems. Additive manufacturing (AM) is regarded as the ‘game changer/paradigm shift’ technology for the digital, automated production of the future — as the key enabler of ‘Production 2.0’. This sustainable and resilient technology enables new paths to innovative solutions across all industries through a high degree of individualization (mass customization) and great design freedom (‘manufacture for design’ instead of ‘design for manufacture‘). For example, internally cooled turbine blades for H₂-capable gas turbines, lightweight structures for more efficient aircraft or patient-specific implants are only made possible by AM. In this way, AM makes an important contribution to solving the social challenges mentioned above now it is necessary to transfer this technology to board industrial use.

Ultrashort-pulse (USP) laser ablation enables the creation of freeform shapes that are challenging to produce with conventional optics manufacturing techniques. To maintain the industrial standards of many branches, it is crucial to not only consider material removal rates but also the surface quality and subsurface damage (SSD). This study investigates the SSD patterns generated in fused silica and quantifies key parameters such as the SSD depth by applying optical coherence tomography (OCT).

Laser powder bed fusion (PBF-LB/M) is an additive manufacturing (AM) process to produce high-strength, functionally integrated, lightweight metal components which cannot be built conventionally. This article addresses the expansion of functionality by integrating sensors within closed cavities. For this reason, the building process was stopped just before the cavities were closed. After positioning the sensors, the building process was continued and a solid connection to the AM component was established.

Traditional machining methods for glass drilling use contact-based processes such as CNC, grinding wheels, or chemical etching, which easily cause surface microcracks, poor quality, or environmental pollution. Additionally, traditional glass sandblasting requires complex steps involving sandblasting and UV curing. Laser processing of glass instead is more efficient, environmentally friendly, and reliable.

For many years, the Jena Laser Conference has been a must-attend event for experts in laser technology, especially for those with their focus on ultra-short-pulse lasers. This year, we are taking an exciting step by expanding the conference to a broader, more international audience. For the first time, the event will be held entirely in English, and we are delighted to welcome Lithuania as our special partner region for 2024.

Lasea is a provider of laser micromachining, plastic welding, marking and traceability, and surface treatment for the medical, watchmaking and jewelry, electronics, and R&D sectors. Its CEO and CCO were interviewed by EPIC's technology manager for biomedical and lasers.