Ausgabe laser+photonics 2020
Editorial

Ultrafast into the new decade

The biggest impact for a practical use of lasers was the invention of a technology that brought pulsed operation of lasers out of the lab into the real world: University professor Ursula Keller invented the semiconductor saturable absorber mirror (SESAM) in the early 1990s while at AT&T Bell Laboratories. A device that made it possible mehr...

Articles

Enhanced 3D vision

The development of a software development kit and of new camera models facilitate the use of 3D camera data and thus enable efficient 3D applications. mehr...

Lidar sensors for the mass market

Autonomous driving and the associated need to equip vehicles with eyes have given lidar technology an upswing in recent years. But how are the existing problems of the technology, such as the complexity and fragility, addressed? One solution could be a newly developed lidar sensor. mehr...

Series production with ultrashort-pulse lasers

With ultra-short-pulse lasers, technical materials can be processed with the greatest possible precision, which opens up new areas of application. In order to transfer these to series production and to be able to guarantee cost-effectiveness, it is essential that the conditions are set for a highly efficient process. mehr...

Compact ultrashort-pulse lasers for complex measurement tasks

Ultrashort-pulse lasers can serve as the basal component of complex measurement systems. Examples include the use of terahertz metrology in materials testing, or THz near-field optical microscopy that permits contact-free measurements of electrical conductivity for the first time. mehr...

Measuring distances through optical fibers

Fiber-optic sensors are often used as light barriers in industrial applications. However, with such sensors it was not possible to make a reliable measurement of the distance to an object. With the new measurement principle of beam profile analysis, it is now possible to measure distances through optical fibers. mehr...

Physical verification for silicon photonics

Electronic circuit design tools have their limits when it comes to designing typical structures of photonic integrated circuits such as ring resonators or grating couplers. The tools require specific add-ons to be applicable for PIC designer. mehr...

Sub-nanosecond laser pulses for time-of-flight measurements

Laser pulses of less than a 100 ps can be realized with a novel laser diode driver by taking advantage of a particular physical effect within the laser diode. TOF applications can thus be improved or new applications for lasers in medical technologies can be exploited. mehr...

Maskless microfabrication of diffractive and refractive optics

Particular trends such as mobile connectivity and sensor technology demand innovative microfabrication technologies. The production chain of advanced optical systems benefits from micro-optical designs generated in rapid design iterations. For this purpose, Nanoscribe offers a promising technology to directly produce high-resolution nano and microstructures with a maskless lithography system. mehr...

Lidar: overview of the latest technologies

Lidar sensors are increasingly being used in automated driving because of their long range and high resolution. But their cost, size and fragility, in particular, are targets of criticism. However, does this still apply to the latest versions of this technology? mehr...

Additive manufacturing of lightweight metal optics

Precision optics from the 3D printer – this sounds simple and obvious but requires the development of a complex process chain. In doing so, free-form optics or high-power mirrors with built-in cooling channels can be produced. mehr...

Displays under the laser cutter

Constantly growing screen diameters increase manufacturing challenges in laser cutting of OLED displays. Not only the substrate area but also the OLED materials play a key role in the selection of the processing technique and processing parameters. mehr...

Interferometer stabilization with linear phase control

A two-arm interferometer that commonly has a non-linear ambiguous phase difference signal can be linearized with a lock-in amplifier and elegant metrology for a change in path length to infinite length. In addition, the signal can be used to compensate systematic measurement errors. mehr...

Fiber-optics sense temperature, strain and vibration

Distributed fiber-optic sensing systems record spatially-resolved profiles of physical quantities along ordinary fiber-optic cables. They open up more and more new applications in the measurement of temperature, strain and vibration in industrial plants and in the monitoring of infrastructure. mehr...

Ensuring that the VCSELs in everyday use are safe

Sensors and imaging are two of the main forces behind the surge in research and use of vertical-cavity surface-emitting laser diodes (VCSELs). They are becoming ever more compact and powerful – and therefore increasingly finding their way into daily life. The key sticking points remain eye safety and energy efficiency. Suitable measurement methods are required here. mehr...

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