We determine the linewidth of the hyperfine structure a10 component of R(56) 32-0 transition of I2 at 532 nm using the dependence of the peak amplitude of the third-derivative signal on the modulation width. We also use the same method to investigate pressure broadening and power broadening of the a10 component. 2005 Elsevier B.V. All rights reserved.

We report the temperature dependence of the zero-bias conductance of a single-electron transistor in the regime of weak coupling between the quantum dot and the leads. The Fano line shape, convoluted with thermal broadening, provides a good fit to the observed asymmetric Coulomb charging peaks. However, the width of the peaks increases more rapidly than expected from the thermal broadening of t...

We study numerically all-optical slow-light delays in room-temperature single-mode optical fibers induced by stimulated Brillouin scattering. We consider the propagation of a pulse through a cw-pumped Brillouin fiber amplifier, where the carrier frequency of the pulse is tuned near the Stokes resonance. Pulse delay and broadening of the Stokes pulse are studied in the small-signal and gain-satu...

We experimentally demonstrate complete compensation of pulse broadening in an amplifier-based slow light system. The configuration of the delay line basically consists of two stages: a conventional Brillouin slow light system and a nonlinear regeneration element. Signal pulses experienced both time delay and temporal broadening through the Brillouin delay line and then the delayed pulses were d...

A novel method for the achievement of zero-broadening in a SBS based slow-light system is discussed in theory and demonstrated experimentally. The system is realized just with a single broadened Brillouin gain. It is shown, that if the gain bandwidth is much broader than the initial pulse width, the output pulse width decreases with increasing pump power. A compression of approximately 90 % of ...

Spectral broadening of the fundamental field in intracavity Raman lasers is investigated. The mechanism for the spectral broadening is discussed and the effect is compared in two lasers using Raman crystals with different Raman linewidths. The impact of the spectral broadening on the effective Raman gain is analyzed, and the use of etalons to limit the fundamental spectral width is explored. It...

We derive the dynamical Stark width and shift of hydrogenic spectral lines caused by Langmuir turbulence in magnetic fusion plasmas. We show that this additional broadening mechanism can dominate over the Stark broadening by the plasma microfield, theories of the latter broadening being also discussed. We also derive conditions necessary for Langmuir-wave-caused dips/depressions to occur in the...

The broadening and shift of the 535.0 nm thallium line resulting from the photodissociation of thallium iodide perturbed by helium, neon and argon were investigated at low densities using a photoelectric Fabry-Perot interferometer. The Doppler and collision broadening components of the line profiles have been determined. Linear variations of both the Lorentzian half-width and the shift of the l...