Cathodoluminescence study of ytterbium doped GaSb

Cathodoluminescence study of the radiative recombination properties of Se-doped GaSb crystals

Amplification in Ytterbium-doped fibers

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Transport of modulation-doped Al0.2Ga0.8Sb/GaSb heterojunctions

Mobilities and carrier densities of modulation doped Al0.2Ga0.8Sb/GaSb heterostructures are presented for the first time. The structures studied were grown by molecular beam epitaxy and consisted of a single heterojunction with Te compensation doping to reduce the intrinsic p-type background. Hall measurements were performed from 30–300 K, giving ptype mobilities peaking at 3240 cm/Vs, a consid...

High peak power Ytterbium doped fiber amplifiers

1 Abstract We have tested a series of Ytterbium doped large core fibers operating near 10Kpps and producing pulses of approximately 1ns. We have achieved 850μJ/pulse resulting in peak powers in excess of 2MW with 0.4ns pulses and near diffraction limited beams. In another fiber, we have achieved over 1.5mJ/pulse with pulses of 900ps corresponding to 1.65MW of peak power and M of 2.5. In the lat...

Photodarkening in ytterbium-doped silica fibers

This paper will be published in the proceedings of SPIE Security & Defense Europe ’05 Symposium and is made available as an electronic preprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for co...