Mid-infrared nonlinear absorption in As_2S_3 chalcogenide glass

Mid-infrared nonlinear absorption in As2S3 chalcogenide glass

We report mid-infrared (MIR) nonlinear absorption in As2S3 glasses which results from two-photon excitation of valence electron to the Urbach extension followed by strong linear absorption of excited states. The measured MIR nonlinear absorption can be 3 to 4 orders of magnitude stronger than the two-photon absorption in the near-infrared for similar laser intensities and does not result from c...

Mid-infrared characterization of solution-processed As2S3 chalcogenide glass waveguides.

An etch-free and cost-effective deposition and patterning method to fabricate mid-infrared chalcogenide glass waveguides for chemical sensing applications is introduced. As(2)S(3) raised strip optical waveguides are produced by casting a liquid solution of As(2)S(3) glass in capillary channel molds formed by soft lithography. Mid-IR transmission is characterized by coupling the output of a quan...

On-chip chalcogenide glass waveguide-integrated mid-infrared PbTe detectors

On-chip mid-infrared gas detection using chalcogenide glass waveguide

Tellurite glass fibers for mid-infrared nonlinear applications

In this chapter, we will review the progress of using tellurite glass nonlinear fibers for mid-infrared nonlinear applications in this chapter. First, we introduce various fabrication approaches for making conventional solid core/clad tellurite glass preforms and structured tellurite glass preforms. Second, two technical difficulties have been found during the early stage of using small-core te...