Adaptive spatial control of fiber modes and their excitation for high-harmonic generation.

We present the control of high-harmonic generation (HHG) in hollow fibers using adaptive pulse shaping techniques. The shaping capabilities of our spatial light modulator (SLM) are demonstrated by the excitation of specific fiber modes inside a hollow fiber with a helium-neon laser. Afterwards spatially shaped ultrashort pulses are used to generate phase-matched high-harmonic radiation in a fiber. We show that by controlling the mode structure, we can manipulate the spatial and spectral properties of the generated harmonics.

[Treatment of peptic ulcer with i.v. ranitidine. A treatment possibility in special cases. Experiences from general practice]. / Behandlung der peptischen Ulkuserkrankung mit i.v. Ranitidin. Eine Behandlungsmöglichkeit in besonderen Fällen. Erfahrungen aus einer Allgemeinpraxis.

20 outpatients with acute peptic ulcer were treated with ranitidine 50 mg i.v. twice daily in an open trial. 92% of the duodenal ulcers and 80% of the gastric ulcers were healed after four weeks treatment. The rapid symptomatic improvement noted during the patients daily visits was particularly impressive. The results of our study show that the commonly practised intravenous treatment of peptic ulcers is also practicable with a modern drug possessing a clearly defined mode of action.