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Two-photon microscopy is a type of fluorescence microscopy that, rather than exciting the sample with a single photon, makes use of multiple photons.

From the development of efficient quantum cascade lasers that cover most of the mid-infrared region to excimer lasers that provide a range of different UV wavelengths, advances in laser technologies mean that most applications can now make use of an appropriate laser source.

Fiber optic microendoscopes have become invaluable imaging tools that have enabled endoscopists to see and describe previously inconceivable things. This article will look into their history, applications, recent research and developments, challenges, and future industry prospects.

For their distant detection, minimum invasion, tolerance to electromagnetic interferences, and excellent resolution, optical-based sensors provide appealing alternatives in temperature monitoring for biological diagnostics. This article will look at a recent study published in Light: Science & Applications.

This article looks at research published in Light: Science & Applications, titled 'Gas fiber lasers may represent a breakthrough in creating powerful radiation sources in the mid-IR'.