Gaussian filtering is one of the very standard ways for reducing the spectral width, it is called "pulse shaping".

The emitted light is incoherent with a relatively wide spectral width of 30-60 nm.

The narrow spectral width also allows for high bit rates since it reduces the effect of chromatic dispersion.

Kunze also stated that: "The enormous spectral widths of the novel lines point to artefacts, too."

Then, the spectral width of the emitted photons is determined by the relaxation rate.

The oxygen lines, studied in detail have spectral widths up to 400 km s -1, which must indicate actual gas velocities of this magnitude.

The emission is nearly diffraction limited with a spectral width similar to that of broadband dye lasers.

Changing the spectral width from zero to infinity moves the phasor toward center.

Using this equation, we can calculate the minimum pulse duration consistent with the measured laser spectral width.

Practical implications of this difference for lifetimes and spectral widths are mentioned in works such as Zobel.