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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Related Experiment Video

Updated: Jun 18, 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

High efficiency supercontinuum generation using ultra-long Raman fiber cavities.

Atalla E El-Taher1, Juan D Ania-Castañón, Vassilis Karalekas

  • 1Photonics Research Group Aston University, Birmingham, B4 7ET, UK. eltaheae@aston.ac.uk

Optics Express
|November 13, 2009
PubMed
Summary

This study demonstrates a novel supercontinuum generation method in an ultra-long Raman fiber laser cavity. Optimized hybrid cavities achieve efficient, flat supercontinuum generation using conventional silica fiber and low pump power.

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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

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
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Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation

Published on: February 25, 2017

Area of Science:

  • Nonlinear optics
  • Fiber optics
  • Laser physics

Background:

  • Supercontinuum generation is crucial for various applications, including spectroscopy and optical communications.
  • Ultra-long fiber laser cavities offer potential for enhanced nonlinear effects.
  • Achieving spectral flatness and high efficiency in supercontinuum sources remains a challenge.

Purpose of the Study:

  • To experimentally investigate supercontinuum generation in a multi-fiber ultra-long Raman fiber laser cavity for the first time.
  • To demonstrate enhanced spectral flatness and generation efficiency.
  • To analyze the dependence of the supercontinuum spectrum on pump power and cavity design.

Main Methods:

  • Utilizing a hybrid tunable wavelength (TW) / highly nonlinear fiber (HNLF) cavity.
  • Employing conventional single-mode silica fiber.
  • Experimentally varying input pump power and cavity parameters.

Main Results:

  • Achieved a supercontinuum source with a bandwidth >260 nm (1440 to >1700 nm) at a pump power of 1.63W.
  • Reported spectral flatness of <1 dB over 180 nm.
  • Demonstrated significantly enhanced spectral flatness and supercontinuum generation efficiency.

Conclusions:

  • The proposed method enables efficient and spectrally flat supercontinuum generation in an ultra-long Raman fiber laser cavity.
  • Conventional single-mode silica fiber can be effectively used for broadband supercontinuum generation.
  • Optimized hybrid cavities are key to achieving high-performance supercontinuum sources.