Ofs Fitel, LLC

Femtolasers Produktions Gmbh

Tuan Le

Kim G Jespersen

Andreas Stingl

Gottfried Strasser

Juraj Darmo

Karl Unterrainer

Embodiments of the present invention describe systems and methods for delivering ultrashort laser pulses through an optical fiber system with higher order mode fiber output and without pre-chirping. In one embodiment of the present invention, an all-fiber delivery system comprises a mode-locked solid-state or fiber laser for generating laser pulses in the 0.2 &#x3bc;m to 1.3 &#x3bc;m wavelength range, a single mode fiber with normal dispersion, and a long-period-grating mode converter, and a higher order mode fiber with anomalous dispersion, wherein the all-fiber delivery system is free of bulk optics, and propagates laser pulses without pulse pre-chirping, and wherein higher order mode output beam from the all-fiber delivery system comprises pulses at less than about 200 femtoseconds.

Method and system for ultrashort pulse fiber delivery using higher order mode fiber

The invention relates to a device for generating terahertz (THz) radiation comprising a short pulse laser () with mode coupling to which a pump beam () is supplied, and comprising a semiconductor component equipped with a resonator mirror (M). This semiconductor component serves to derive the THz radiation based on incident laser pulses. The resonator mirror (M), preferably a resonator end mirror, is provided with a semiconductor layer (), which is partially transparent to the laser radiation of the short pulse laser (), whose absorption edge is lower than the energy of the laser radiation of the short pulse laser () and on which the electrodes () that can be connected to a bias voltage source are placed in order to generate and radiate the THz radiation in the electric field.

Device for generating terahertz radiation, and a semiconductor component

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Vienna, Austria

Tuan Le