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Atomic Emission Spectroscopy: Overview

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Related Experiment Video

Updated: Jul 1, 2026

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
09:39

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

Published on: May 27, 2013

Toward visible cw-pumped supercontinua.

B A Cumberland1, J C Travers, S V Popov

  • 1Femtosecond Optics Group, Imperial College London, London, UK. b.cumberland05@imperial.ac.uk

Optics Letters
|September 17, 2008
PubMed
Summary
This summary is machine-generated.

We generated a supercontinuum extending below the pump wavelength to 0.65 µm using a Yb fiber laser and specialized photonic crystal fiber. This breakthrough utilizes four-wave mixing and soliton trapping for enhanced short-wavelength generation.

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Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
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Area of Science:

  • Nonlinear Optics
  • Laser Physics
  • Materials Science

Background:

  • Supercontinuum generation is crucial for various spectroscopic applications.
  • Extending supercontinuum spectra to shorter wavelengths presents significant challenges.
  • Photonic crystal fibers offer unique dispersion properties for light manipulation.

Purpose of the Study:

  • To achieve supercontinuum generation extending below the pump wavelength.
  • To investigate the underlying physical mechanisms responsible for short-wavelength spectral broadening.
  • To analyze the factors limiting the supercontinuum evolution.

Main Methods:

  • Utilizing a continuous-wave (CW) Ytterbium (Yb) fiber laser operating at 1 µm.
  • Employing a photonic crystal fiber (PCF) with a precisely engineered zero-dispersion wavelength.
  • Analyzing spectral broadening through nonlinear optical phenomena like four-wave mixing and soliton dynamics.

Main Results:

  • Successfully generated a supercontinuum spectrum extending down to 0.65 µm.
  • Demonstrated that short-wavelength generation is driven by four-wave mixing and dispersive wave trapping by solitons.
  • Observed and discussed the spectral evolution and limitations of the supercontinuum.

Conclusions:

  • The engineered PCF and Yb laser enable unprecedented short-wavelength supercontinuum generation.
  • Four-wave mixing and soliton dynamics are key mechanisms for extending spectra below the pump.
  • Understanding limiting factors is essential for optimizing future supercontinuum sources.