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Related Experiment Videos

Fiber ring laser with a feedback mirror.

H Abitan1, H Bohr, C F Pedersen

  • 1Technical University of Denmark, Physics Institute, the QUP Center, and the Optics Group, Building 309, DK-2800, Lyngby, Denmark.

Applied Optics
|December 31, 2005
PubMed
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A ytterbium-doped fiber laser

Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Materials Science

Background:

  • Photonic crystal fibers (PCFs) offer unique light manipulation properties.
  • Ytterbium-doped fibers are crucial for generating high-power laser output.
  • Ring laser configurations provide stable laser operation.

Purpose of the Study:

  • To investigate the spectral and power characteristics of a ytterbium-doped PCF laser.
  • To evaluate the impact of external feedback on laser stability.
  • To explore novel spectral phenomena induced by feedback.

Main Methods:

  • Utilized a ytterbium-doped double-clad PCF in a ring laser setup.
  • Employed an external mirror for selective feedback of one output beam.
  • Compared laser performance with and without the external feedback mirror.

Related Experiment Videos

  • Analyzed spectral and power output using appropriate diagnostic tools.

    • Main Results:

    • External feedback significantly reduced spectral and power fluctuations.
    • Observed a unique periodic frequency drift phenomenon.
    • The laser frequency drifted over a 9 nm range at a rate of 2 nm/s.
    • Demonstrated stabilization and induced spectral dynamics through controlled feedback.

    Conclusions:

    • External feedback is effective in stabilizing ytterbium-doped PCF lasers.
    • The observed periodic frequency drift is a novel spectral behavior in such laser systems.
    • This study provides insights into controlling and manipulating laser output characteristics.
    • Potential applications in tunable laser sources and optical sensing.