The negatively charged nitrogen-vacancy centre in diamond ... 1b, to achieve strong stimulated emission at the same wavelength. This laser is resonant with the transition between the excited ...

Physicists at ETH Zurich have developed a lens that can transform infrared light into visible light by halving the wavelength ...

They also used a nitrogen-filled hollow-core fiber ... could very well meet the increasing demand for long-wavelength ultrafast sources in laser and strong-field applications, starting with ...

However, the method they typically employ — injecting electric current into semiconductors — hasn’t worked as well in building tiny lasers that emit light at yellow and green wavelengths. Researchers ...

Obviously the wavelength of a laser can’t be measured with a scale as large as that of a carpenter’s tape measure. At least not directly and that’s where a Compact Disc comes in.