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Hexagonally stacked all-glass multi-core leakage-channel fibers consisting of seven fused silica cores of up to 100 mum in diameter were fabricated. Simultaneous fundamental mode propagation in all cores and their active coherent combination was demonstrated.
We demonstrate a Fabry-Perot cavity, passively saturable-absorber-modelocked Yb-fiber femtosecond oscillator with up to 1.04 GHz fundamental repetition rate, enabling octave spanning continuum generation and self-referenced fCEO stabilization.
We demonstrate a rapidly scanning all-fiber Fourier transform spectrometer based on a temporal scanning all-optical delay line constructed with two mode-locked 1-GHz Yb fiber lasers. An effective mirror scan rate of 7.5 km/s is achieved.
We spectrally broaden a low phase noise Yb-femtosecond similariton fiber oscillator to more than an octave bandwidth. Using the f-2f self-referencing scheme we detect and stabilize its carrier envelope offset frequency.
Summary form only given. Using the great variety of ionic dopants of the lanthanides the spectral range between 0.9 and 3 /spl mu/m can be covered. The beam parameter product of high-power diode laser (arrays) used as pump sources call for the development of fibers with an adapted design. The recently introduced double-clad fibers are well suited to fulfill this demand. The appearance of whispering...
Summary form only given. In conclusion, we have developed a large-mode-area Er-doped fiber amplifier and demonstrated a substantial improvement in reducing fiber nonlinearities and ASE-induced suppression of gain to increase the extracted pulse energies from a fiber-based CPA system. Using this technique we have produced pulses with energies >20 /spl mu/J.
Automatic spectral gain equalisation is demonstrated using controlled spatial hole-burning in an erbium-doped twincore fibre. Gain equalisation rates up to 0.11 dB difference between input signal levels are demonstrated and should increase the useful bandwidth of cascaded amplifiers.<<ETX>>
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