Sub-100 fs pulses from an all-polarization maintaining Yb-fiber oscillator with an anomalous dispersion higher-order-mode fiber

A. J. Verhoef, L. Zhu, Stine Møller Israelsen, Lars Erik Grüner-Nielsen, A. Unterhuber, W. Kautek, Karsten Rottwitt, A. Baltuška, Alicia Jimenez Fernandez

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


We present an Yb-fiber oscillator with an all-polarizationmaintaining cavity with a higher-order-mode fiber for dispersion compensation. The polarization maintaining higher order mode fiber introduces not only negative second order dispersion but also negative third order dispersion in the cavity, in contrast to dispersion compensation schemes used in previous demonstrations of all-polarization maintaining Yb-fiber oscillators. The performance of the saturable absorber mirror modelocked oscillator, that employs a free space scheme for coupling onto the saturable absorber mirror and output coupling, was investigated for different settings of the intracavity dispersion. When the cavity is operated with close to zero net dispersion, highly stable 0.5-nJ pulses externally compressed to sub-100-fs are generated. These are to our knowledge the shortest pulses generated from an all-polarization-maintaining Yb-fiber oscillator. The spectral phase of the output pulses is well behaved and can be compensated such that wing-free Fourier transform limited pulses can be obtained. Further reduction of the net intracavity third order dispersion will allow generating broader output spectra and consequently shorter pulses, without sacrificing pulse fidelity.
Original languageEnglish
Title of host publicationThe European Conference on Lasers and Electro-Optics 2015
Number of pages2
PublisherOptical Society of America
Publication date2015
ISBN (Print)978-1-4673-7475-0
Publication statusPublished - 2015
EventCLEO/Europe - EQEC 2015 - ICM Congress Centre, Munich, Germany
Duration: 21 Jun 201525 Jun 2015


ConferenceCLEO/Europe - EQEC 2015
LocationICM Congress Centre

Bibliographical note

From the session: Mode-locked Fibre Oscillators (CJ_2)


  • Atomic and Molecular Physics, and Optics
  • Dispersion compensation
  • Electromagnetic dispersion
  • Fibers
  • Mirrors
  • Polarization
  • Saturable absorbers
  • Ytterbium
  • Intra-cavity dispersion
  • Mode-locked oscillators
  • Negative third-order dispersion
  • Polarization maintaining
  • Saturable absorber mirrors
  • Second-order dispersion
  • Third order dispersion
  • Transform-limited pulse
  • Polarization-maintaining fiber


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