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Two Octaves Supercontinuum Generation in Lead-Bismuth Glass Based Photonic Crystal Fiber.

Ryszard Buczynski1,2, Henry Bookey3, Mariusz Klimczak4

  • 1Institute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland. ryszard.buczynski@itme.edu.pl.

Materials (Basel, Switzerland)
|August 10, 2017
PubMed
Summary

Researchers achieved a record-broad supercontinuum generation from 700-3000 nm using a novel lead-bismuth-gallate photonic crystal fiber. This breakthrough in heavy metal oxide glass fibers opens new possibilities for optical applications.

Keywords:
photonic crystal fiberssoft glasssupercontinuum generation

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Area of Science:

  • Photonics and Optical Engineering
  • Materials Science

Background:

  • Supercontinuum generation is crucial for various optical applications, requiring broadband light sources.
  • Heavy metal oxide glass-based photonic crystal fibers (PCFs) offer unique nonlinear and transmission properties for light manipulation.

Purpose of the Study:

  • To demonstrate ultra-broadband supercontinuum generation in a novel heavy metal oxide glass PCF.
  • To characterize the supercontinuum spectrum and flatness for potential applications.

Main Methods:

  • Fabrication of a single-mode PCF using in-house synthesized lead-bismuth-gallate glass with optimized properties.
  • The PCF features 8 rings of air holes, with specific relative hole sizes (0.73 and 0.54) to control single-mode operation and dispersion.
  • Pumping the 2 cm long fiber with 150 fs pulses at 1540 nm into the anomalous dispersion regime.

Main Results:

  • Achieved a two-octave spanning supercontinuum from 700 nm to 3000 nm.
  • This represents the broadest supercontinuum reported to date in heavy metal oxide glass-based fibers.
  • Observed a spectral flatness of 5 dB within the 950-2500 nm range with pulse energy below 4 nJ.

Conclusions:

  • The developed lead-bismuth-gallate PCF enables unprecedented supercontinuum bandwidth in heavy metal oxide glass.
  • The results highlight the potential of this material for creating advanced broadband light sources.