We demonstrate chalcogenide optical fiber couplers designed with a transmission spectrum response that varies input power. The measured critical power is as low 126 W at wavelength of 1938 nm.

This Report is a collation of the information supplied to EOARD 2014-2017 comprising the original Proposal, intermediate Reports consisting of PowerPoint slides (Feb. 2015) and interim Progress Report (June 2015) and the Final Report. The EOARD funding award ($50k) was used in its entirety to purchase a bespoke midinfrared quantum cascade laser (MIR-QCL) for use in far-field and near-field asse...

We have demonstrated what we believe to be the first waveguide photonic crystal cavity operating in the mid-infrared. The devices were fabricated from Ge23Sb7S70 chalcogenide glass (ChG) on CaF2 substrates by combing photolithographic patterning and focused ion beam milling. The waveguide-coupled cavities were characterized using a fiber end fire coupling method at 5.2 μm wavelength, and a load...

We demonstrated high-index-contrast, waveguide-coupled As2Se3 chalcogenide glass resonators monolithically integrated on silicon fabricated using optical lithography and a lift-off process. The resonators exhibited a high intrinsic quality factor of 2×10(5) at 5.2 μm wavelength, which is among the highest values reported in on-chip mid-infrared (mid-IR) photonic devices. The resonator can serve...

Mid-infrared photonic integrated circuits (PICs) that combine on-chip light sources with other optical components constitute a key enabler for applications such as chemical sensing, detection, ranging, and free-space communications. In this paper, we report the monolithic integration of interband cascade lasers emitting at 3.24 µm passive, high-index-contrast waveguides made chalcogenide glasse...

§ Laboratoire GCR-CNRS URA 769 Université Pierre et Marie Curie, Tour 22, Boite 142 4, Place Jussieu, 75252 Paris Cedex 05, France ¶ Instituto de Fisica, Universidad Nacional Autonoma de México Apartado Postal 20-364, 01000 México DF, México (February 1, 2008) We give in this letter a set of general rules which allow the prediction of the value of the glass transition temperature Tg in network ...

We report our results of continuous illumination of Ge46S54 chalcogenide glass films with bandgap light in air. The outcome of this process is the formation of Ge–S backbone depleted in germanium. We relate this to consumption of some of the germanium available in the initial material due to the occurrence of a photoinduced oxidation. This is proved using energy dispersion spectroscopy which sh...