What is the green flash? It’s often tied to pirate folklore but also commonly occurs in reality – learn what causes the flash ...

Laser frequency combs are light sources that produce evenly spaced, sharp lines across the spectrum, resembling the teeth of ...

Different methods are used for chromatic dispersion and polarization mode dispersion. An optical amplifier similar to an EDFA, but derives a higher gain through a small waveguide rather than ...

A project from the Harvard SEAS lab of metamaterials developer Federico Capasso could help address the issue of unwanted light dispersion in optical systems. This could be a particular benefit for ...

We're putting these big astronomy binos to the test for lunar viewing, stargazing and observing deep-sky objects.

The physical characteristics of optical fibers cause some of these wavelengths to travel faster or slower than others (Figure 1). This effect, called chromatic dispersion, can cause serious problems ...

Fiber Bragg Grating technology bests conventional dispersion compensation fiber in terms of attenuation and bandwidth in the new 40- and 100-Gbit/s optical networks. The pursuit of faster and more ...

Similarly, the normal dispersion of ULL means light pulses spread ... Vahala says "a comb is like a Swiss army knife for optics. It has many different functions, and that's why it's such a ...

The drawing on the right is of a single waveguide. (Courtesy Boubacar Kanté) A new type of metasurface lens developed by US researchers is far less susceptible to optical dispersion than previous ...