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Frequency-resolved spatial beam mapping in multimode fibers: application to mid-infrared supercontinuum generation

Optics Letters, ISSN: 1539-4794, Vol: 46, Issue: 15, Page: 3717-3720
2021
  • 7
    Citations
  • 0
    Usage
  • 10
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    7
    • Citation Indexes
      7
  • Captures
    10

Article Description

We present a new, to the best of our knowledge, spatial-spectral mapping technique permitting measurement of the beam intensity at the output of a graded-index multimode fiber (GIMF) with sub-nanometric spectral resolution. We apply this method to visualize the fine structure of the beam shape of a sideband generated at 1870 nm by geometric parametric instability (GPI) in a GIMF. After spatial-spectral characterization, we amplify the GPI sideband with a thulium-doped fiber amplifier to obtain a microjoule-scale picosecond pump whose spectrum is finally broadened in a segment of InF optical fiber to achieve a supercontinuum ranging from 1.7 up to 3.4 µm.

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