Volume 55, Issue 06

Content from Volume 55, Issue 06

LASER World of PHOTONICS 2019 exhibition to showcase latest in photonics

Optical materials is no small business—An interview with Amy Eskilson

Swiss timepieces reach new heights with 3D glass microfabrication

The TuLIPSS hyperspectral imager schematic is detailed. (Image credit: Rice University)

Optical fiber-based TuLIPSS captures ‘snapshot’ hyperspectral images

For a microcrystalline SiC thin-film thermal emitter in a cavity-coupled setup (a), a platinum heater ring (b) heats the suspended thermal emitter structure while minimizing conductive losses into the surrounding substrate. The suspended region stays hot while the temperature shifts to blue (cold) in the nonsuspended region of the substrate (c). (Image credit: Columbia University)

Thin-film-based optical cavity coupling enhances broadband thermal emission

Plasma-ion-assisted deposition (PIAD) produces high-quality optical thin film layers; PIAD films have the desired properties of complete oxidation and high packing density distributed over a wide substrate area.

Process diagnostics in PIAD: tracing plasma fluctuations and drifts

FIGURE 1. Two basic connector concepts include a cylindrical connector (a) and a cone connector (b); mechanical reference areas are marked red and the impinging laser radiation is shown in green.

High-power fiber connectors keep it simple

FIGURE 1. Shown is the temporal dependence of various laser-induced damage mechanisms for pulsed lasers.

Resolving damage ambiguity and laser-induced damage threshold (LIDT) complications

$A nonperiodic pinhole-based photon sieve widens the display angle of a lensless digital dynamic holographic display produced by a liquid-crystal-based spatial light modulator (SLM). At top, a dynamic holographic display without the nonperiodic photon sieve has a narrow viewing angle. At bottom, a holographic display with the nonperiodic photon sieve, which diffracts light at a high angle, has a larger viewing angle. The pinhole array in the sieve is made nonperiodic to avoid creating periodic arrays of diffraction artifacts. The researchers note that the holographic objects to be displayed need to appear within the shaded regions to prevent clipping.$

Laser Focus World