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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.
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 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.
The dependence to the curvature of the highly-negative-chromatic-dispersion wavelength into a dual concentric core fibre (DCCF) is experimentally investigated. Winding a DCCF onto a 3.3cm reel allows to shift the wavelength up to 40nm.
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