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Recently, a considerable progress has been done on power and energy scaling of pulsed thulium doped fiber amplifiers working at l ∼ 2 mm [1, 2]. However, obtaining a high average power directly at the oscillator output remains a real challenge mainly due to the anomalous waveguide dispersion at this wavelength range. Usually energy scaling of mode-locked oscillators is based on dissipative solitonic...
We report on oscillators and amplifiers based on all-silica singlemode, large mode area photonic bandgap fibers elaborated by the modified chemical vapour deposition process.
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.
Nonlinear chirped pulse amplification at high average power and supercontinuum generation are demonstrated in bandgap fibres. A hollow-core fibre is proposed as a host for nonlinear frequency conversion in gas.
We demonstrate amplification of femtosecond pulses in large mode area singlemode Yb-doped photonic bandgap Bragg fibers. 260 fs 5 µJ pulses are obtained at 100 kHz repetition rate (1 W of average power).
100 W output power from Yb3+-doped LMA photonic bandgap Bragg fiber laser is reported. 81% slope efficiency was obtained. To our knowledge, this is the highest output power generated from an active photonic bandgap fiber.
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...
Three-dimensional modeling of modal competition in fiber lasers is presented. The numerical model is used to design a large mode area active fiber laser in which high order modes' suppression is wavelength insensitive.
We report a tunable laser source emitting in the visible (530 nm, 630 nm) and the near infrared (775 nm, 1060 nm, and 1550 nm) regions by frequency summation of a dual wavelength Er/Yb co-doped fiber laser.
We introduce the design of an amplifying and nonlinear microstructured optical fiber. This unusual guide permits the nonlinear propagation with regeneration of the pump wave. The first fabricated structure is experimentally tested for supercontinuum generation.
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