Abstract
Recently, a considerable progress has been done on power and energy scaling of pulsed thulium doped fiber amplifiers working at λ ~ 2 µm [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 (DS) regime which requires normal net cavity dispersion [3]. For λ > 1.5 µm, one must use dispersion compensating elements inside the cavity to provide such an operating regime [4]. Typically, pulse energy measured directly at the output of a passively mode-locked thulium fiber oscillator in net normal dispersion cavities is in order of few mW [5].
© 2013 IEEE
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