Ultrafast laser-inscribed mid-infrared transmission gratings in IG2: modelling and high-resolution spectral characterization

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

Research output: Contribution to journalArticle

33 Downloads (Pure)

Abstract

The ultrafast laser inscription technique was used to fabricate mid-infrared volume gratings in the bulk of chalcogenide glass IG2 (Ge33As12Se55). These gratings are spectrally characterized using a Fourier transform infrared spectrometer, by measuring the transmission spectrum over the entire transmission band of the IG2 substrate. The gratings exhibit first order diffraction across the entire 2–5 μm spectral band, with the specific transmission band tuned by changing the angle of incidence. Higher diffraction orders are also observed. High-resolution spectral data is presented alongside detailed modelling and analysis. This work provides the basis for future design of mid-infrared transmission gratings; ULI provides a low-cost, robust alternative to mid-infrared reflection gratings, with the added capability to engineer the grating response to a specific application.

Original languageEnglish
Pages (from-to)33617-33628
Number of pages12
JournalOptics Express
Volume25
Issue number26
DOIs
Publication statusPublished - 25 Dec 2017

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Ultrafast laser-inscribed mid-infrared transmission gratings in IG2: modelling and high-resolution spectral characterization'. Together they form a unique fingerprint.

  • Cite this