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The use of 40 μm diameter core Yb-doped Bragg fibers in two-stage CPA system is reported with maximum amplified pulse energy limited by the experimental set-up only. 82 W average output power before compression from photonic bandgap fiber was obtained.
We present a leaky thulium-doped photonic crystal fibre (PCF) design to down shift the thulium emission in the 1.7 - 1.8 mum band. The microstructured cladding structure manages confinement loss to counteract the thulium emission cross section. Thus, the fibre is considered as a distributed low pass filter along the fibre length. Computations on confinement loss show differential loss two orders of...
A fiber-optic sensor for torsion measurement, based on a two-linearly polarized (LP)-mode operation in ultrahigh birefringent photonic crystal fiber is described. The structure of the photonic crystal fiber presents two large asymmetric holes adjacent to the core fiber. When linearly polarized light is injected in x - and y -directions, respectively, two separate interferometers can be obtained. In...
We present a theoretical study and an experimental demonstration of stimulated Raman effect in a hollow core photonic crystal fiber filled with a low index nonlinear liquid (ethanol).
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