What is the linewidth enhancement factor?

Definition: a parameter quantifying the amplitude–phase coupling in a laser. Alternative term: Henry factor. Categories: laser devices and laser physics, physical foundations.

What is intrinsic linewidth?

A fundamental yet unknown property of valley excitons in these materials is the intrinsic homogeneous linewidth, which reflects irreversible quantum dissipation arising from system (exciton) and bath (vacuum and other quasiparticles) interactions and determines the timescale during which excitons can be coherently …

What is a narrow linewidth?

The term narrow-linewidth lasers usually applies to single-frequency lasers, i.e., lasers oscillating on a single resonator mode with low phase noise and thus with high spectral purity. Typically, such lasers also exhibit low intensity noise.

What is the meaning linewidth?

The linewidth (or line width) of a laser, e.g. a single-frequency laser, is the width (typically the full width at half-maximum, FWHM) of its optical spectrum. More precisely, it is the width of the power spectral density of the emitted electric field in terms of frequency, wavenumber or wavelength.

How is spectral linewidth calculated?

The spectral width caused by phase noise is commonly referred to as spectral linewidth, which is proportional to the rate of spontaneous emission and inversely proportional to the photon density: Δ ω ∝ R sp / ( 2 P ) .

What causes NMR peak broadening?

Broad peaks can represent inhomogeneities in the magnetic field which may have been caused by poor shimming, paramagnetic materials in the sample or particulate matter. Alternatively, peaks can broaden due to exchange processes on the NMR time scale.

How do you find linewidth?

the linewidth (FWHM) is proportional to the square of the resonator bandwidth divided by the output power (assuming that there are no parasitic resonator losses).