Özgören, K.Ilday, F. Ö.2016-02-082016-02-082010-04-150146-9592http://hdl.handle.net/11693/22355We propose the use of a short section of polarization-maintaining fiber as a birefringent medium to construct an all-fiber Lyot filter inside the cavity of a fiber laser. This allows mode-locked operation of an all-fiber all-normal dispersion Yb-fiber oscillator without the use of a bulk bandpass filter and using standard components. Moreover, filter bandwidth and modulation depth is easily controlled by changing the length and splice angle of the polarization-maintaining-fiber section, leading to an adjustable filter. At mode-locked operation, the 30% output fiber port delivers 1nJ pulses that are dechirped to 230 fs duration.EnglishAll fiberBirefringent mediumsFilter bandwidthLyot filtersMode-lockedModulation depthNormal dispersionOutput fibersPolarization maintainingPolarization maintaining fibersStandard componentsYb-fiberAmplificationBandpass filtersDispersionsFiber lasersModulationPolarizationYtterbiumFibersArticle10.1364/OL.35.001296