IPG Photonics

About: IPG Photonics is a based out in . It is known for research contribution in the topics: Laser & Fiber laser. The organization has 903 authors who have published 1241 publications receiving 63339 citations.

Precision spectral sculpting for narrow-band amplification of broadband frequency-modulated pulses.

Abstract: Amplification of broadband frequency-modulated (FM) pulses in high-efficiency materials such as ytterbium-doped strontium fluorapatite results in significant gain narrowing, leading to reduced on-target bandwidths for beam smoothing and to conversion from frequency modulation to amplitude modulation (AM). To compensate for these effects, we have applied precision spectral sculpting, requiring both amplitude and phase shaping, to the amplification of broadband FM pulses in narrow-band gain media. We have demonstrated sculpting for centerline small-signal gains of 104, producing amplified pulses that have both sufficient bandwidths for on-target beam smoothing and temporal profiles that have no potentially damaging AM.

Post-rift uplift of the dhofar margin (gulf of aden)

Abstract: An investigation of the sedimentation pattern along the Dhofar margin allows us to describe its late-stage evolution. After the accumulation of a thick post-rift sedimentary succession, two debris flow events occurred at the foot of the slope. The first event, affecting a wide area of the margin, marks a major change in sedimentation. The second event is associated with a shift of sedimentary deposition from the slope toward the basin. This latter debris flow was caused by an uplift phase, and highlights two distinct deformational styles in the eastern and western part of the Dhofar margin. Both events occurred very late in the history of the margin, at least 7.6 Ma after the end of the rifting phase (35-17.6 Ma).

Comparison of the low-Q features in diffraction data for silicate glasses and crystals containing Sr or Ba

Abstract: Neutron scattering data have been obtained for a strontium- and a barium-containing silicate glass and a strontium aluminosilicate glass. These data are compared with previously published anomalous wide-angle X-ray scattering data for the Sr-containing glasses. Features in the diffraction data at the smaller scattering vectors, Q , are compared with simulated X-ray and neutron diffraction patterns for compositionally similar crystals. Peaks are found at Q s close to the `first sharp diffraction peaks' of the glasses and have a cation–cation dependence. We suggest that this correspondence shows that the smaller Q features in the glasses have similar structural origins to those in the scattering data for the crystals with the same composition and therefore that the medium-range structures and cation–cation arrangements in the glasses are similar too.