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Continuous-wave, high-power, Raman continuum generation in holey fibers.

A V Avdokhin1, S V Popov, J R Taylor

  • 1Femtosecond Optics Group, Department of Physics, Imperial College, Prince Consort Road, London SW7 2 BW, England.

Optics Letters
|August 9, 2003
PubMed
Summary
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Low pump power can generate continuous wave (cw) Raman continuum. Optimization of pump power and Raman interaction length in holey fibers achieved a 3.8-W, 324-nm-wide continuum with high spectral power density.

Area of Science:

  • Photonics and Optics
  • Nonlinear Fiber Optics
  • Raman Spectroscopy

Background:

  • Continuous wave (cw) Raman continuum generation is crucial for various spectroscopic applications.
  • Previous methods often required high pump power, limiting practical applications.
  • Holey fibers offer unique properties for nonlinear optical processes.

Purpose of the Study:

  • To demonstrate the feasibility of generating cw Raman continuum using low pump power.
  • To optimize parameters for efficient Raman continuum generation in holey fibers.
  • To achieve a high-power, broadband cw Raman continuum in a compact fiber format.

Main Methods:

  • Optimization of pump peak power for Raman interaction.
  • Modeling and compensation for loss-induced reduction of effective Raman interaction length.

Related Experiment Videos

  • Utilizing single-mode, holey fibers for continuum generation.

    • Main Results:

    • Demonstrated cw Raman continuum generation with significantly reduced pump power.
    • Achieved a 3.8-W output power for the Raman continuum.
    • Generated a broadband continuum spanning 324 nm.
    • Obtained a spectral power density exceeding 10 mW/nm.

    Conclusions:

    • Low pump power is sufficient for efficient cw Raman continuum generation.
    • Fiber-integrated, single-mode systems can produce high-quality Raman continua.
    • This advancement has implications for compact and versatile spectroscopic sources.