Thus P' represents the maximum value of the spectral absorption coefficient if only Doppler broadening occurred; b, bc, and bD denote, respectively, the natural half-width,t the half-width resulting from collision (Lorentz) broadening, and the half-width produced by Doppler broadening; S is the integrated intensity of the spectral line under study whose center lies at wo; m is the mass of the r...

2 Radiation and Atoms 1 2.1 Width and Shape of Spectral Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.1.1 Lifetime Broadening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.1.2 Collision or Pressure Broadening . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1.3 Doppler Broadening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

We show a novel technique to distinguish between Doppler shifted and unshifted light in multiple scattering experiments on mixed static and dynamic media. With a phase modulated low coherence Mach- Zehnder interferometer, optical path lengths of shifted and unshifted light and path length dependent Doppler broadening are measured in a two-layer tissue phantom, with a superficial static layer of...

Self-mixing laser sensors require few components and can be used to measure velocity. The self-mixing laser sensor consists of a laser emitting a beam focused onto a rough target that scatters the beam with some of the emission re-entering the laser cavity. This 'self-mixing' causes measurable interferometric modulation of the laser output power that leads to a periodic Doppler signal spectrum ...

Inhomogeneous broadening is ubiquitous in light-matter interactions [1]. When a laser beam interacts with a gas, the dominant broadening is typically due to the Doppler effect, which causes atoms to experience different laser frequencies depending on their velocities. For atoms embedded in crystals, the inhomogeneous broadening is a result of the shifts in the energy levels due to local variati...