Ultrafast laser-inscribed waveguides in IG2 chalcogenide glass for mid-infrared photonics applications

Helen L. Butcher, David Guillaume MacLachlan, David Lee, Robert R. Thomson, Damien Weidmann

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


We present the first demonstration of ultrafast laser-inscribed waveguides in IG2 chalcogenide glass and their coupling to a mid-infrared quantum cascade laser. The fabrication parameter space has been investigated, resulting in optimized single-mode waveguides that have estimated propagation losses of 1 dB/cm at 7.8 μm. Higher order mode propagation was also observed. The refractive index modification caused by ultrafast laser inscription has been empirically quantified by comparison with modeled waveguide parameters, resulting in Δn = 0.0097-0.0143 over the pulse energy range investigated. We will present these findings, alongside our initial investigation into waveguide bend losses, which prepare the building blocks towards mid-infrared evanescent field coupling and integrated sensing applications.

Original languageEnglish
Title of host publicationIntegrated Optics
Subtitle of host publicationDevices, Materials, and Technologies XXII
EditorsSonia M. García-Blanco , Pavel Cheben
ISBN (Electronic)9781510615564
ISBN (Print)9781510615557
Publication statusPublished - 23 Feb 2018

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


  • Chalcogenide
  • IG2
  • Mid-infrared.
  • Ultrafast laser inscription
  • Waveguide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Ultrafast laser-inscribed waveguides in IG2 chalcogenide glass for mid-infrared photonics applications'. Together they form a unique fingerprint.

Cite this