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Spotlight on Optics
Ultrashort pulse written fiber Bragg gratings as narrowband filters in multicore fibers
Summary by Bernhard Schmauss

How does one filter a multimode signal with single-mode quality by fiber Bragg gratings (FBGs) in a multicore...

Harmonic injection locking of high-power mid-infrared quantum cascade lasers
Summary by Borislav Hinkov

Quantum cascade laser (QCL) frequency comb-based metrology is a very powerful tool, being able to address the strong...

Compact, self-aligned focusing schlieren system
Summary by Brynmor Davis

Bathel and Weisberger describe an elegant method for greatly simplifying focusing schlieren imaging. Standard schlieren...

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