All Outputs (53)

Short review and prospective: chalcogenide glass mid-infrared fibre lasers (2024)
Journal Article

Rare-earth ion doped, silica glass, optical fibre amplifiers have transformed the world by enabling high speed communications and the Internet. Fibre lasers, based on rare-earth ion doped silica glass optical fibres, achieve high optical powers and a... Read More about Short review and prospective: chalcogenide glass mid-infrared fibre lasers.

Simulation of a Sensitive Mid-infrared (MIR) D-Shaped Optical Fiber Water Pollutant Sensor (2023)
Journal Article

In this work, an efficient optical sensor is proposed for the sensitive detection of various pollutants in water. The suggested optical sensor is based on an indium fluoride (InF3) glass fabricated as a D-shaped optical fiber. The polished surface of... Read More about Simulation of a Sensitive Mid-infrared (MIR) D-Shaped Optical Fiber Water Pollutant Sensor.

Mid-infrared water pollutant sensor based on SPR-PCF (2023)
Journal Article

In this paper, a highly sensitive water pollutant optical sensor is proposed and analyzed. The suggested sensor consists of photonic crystal fiber with a core surrounded by four elliptical holes infiltrated with the studied analyte (pure/polluted wat... Read More about Mid-infrared water pollutant sensor based on SPR-PCF.

(INVITED) Mid-infrared photoluminescence in Ce 3+ doped selenide-chalcogenide glass and fiber (2023)
Journal Article

We provide measurements to support our earlier report of continuous wave fiber lasing in a small core Ce 3+-doped selenide chalcogenide SIF (step index fiber) of core: Ge-As-Ga-Se chalcogenide glass, doped with 500 ppmw (parts-per-million by weight)... Read More about (INVITED) Mid-infrared photoluminescence in Ce 3+ doped selenide-chalcogenide glass and fiber.

Vibrational Biospectroscopy: An Alternative Approach to Endometrial Cancer Diagnosis and Screening (2022)
Journal Article

Endometrial cancer (EC) is the sixth most common cancer and the fourth leading cause of death among women worldwide. Early detection and treatment are associated with a favourable prognosis and reduction in mortality. Unlike other common cancers, how... Read More about Vibrational Biospectroscopy: An Alternative Approach to Endometrial Cancer Diagnosis and Screening.

Non-spectroscopic sensing enabled by an electro-optical reservoir computer (2022)
Journal Article

A fully bio-inspired apparatus to perform non-spectroscopic sensing to discriminate and determine the constituent concentrations of a chemical mixture is proposed. Here, fully bio-inspired means that it is comprised of a biomimetic sensor and a neuro... Read More about Non-spectroscopic sensing enabled by an electro-optical reservoir computer.

Mid-infrared spectral classification of endometrial cancer compared to benign controls in serum or plasma samples (2021)
Journal Article

This study demonstrates a discrimination of endometrial cancer versus (non-cancerous) benign controls based on mid-infrared (MIR) spectroscopy of dried plasma or serum liquid samples. A detailed evaluation was performed of four discriminant methods (... Read More about Mid-infrared spectral classification of endometrial cancer compared to benign controls in serum or plasma samples.

Room temperature mid-infrared fiber lasing beyond 5  µm in chalcogenide glass small-core step index fiber (2021)
Journal Article

We report mid-infrared fiber lasing for the first time above 5 µm in a room temperature, Ce 3+ doped, chalcogenide glass, step index fiber using in-band pumping with a 4.15 µm quantum cascade laser. The lasing fiber is 64 mm long, with a calculated n... Read More about Room temperature mid-infrared fiber lasing beyond 5  µm in chalcogenide glass small-core step index fiber.

Internal examination of mid-infrared chalcogenide glass optical fiber preforms and fiber using near-infrared imaging (2021)
Journal Article

We report on the internal examination of mid-infrared chalcogenide glasses using near-infrared light to reveal light-scattering defects. The technique is demonstrated on imperfectly made chalcogenide glass rods and fiber. This simple, non-destructive... Read More about Internal examination of mid-infrared chalcogenide glass optical fiber preforms and fiber using near-infrared imaging.

Thermo-mechanical Dynamics of Nanoimprinting Anti-Reflective Structures onto Small-core Mid- IR Chalcogenide Fibers (2021)
Journal Article

Thermal nanoimprinting is a fast and versatile method for transferring the anti-reflective properties of subwavelength nanostructures onto the surface of highly reflective substrates, such as chalcogenide glass optical fiber end-facets. In this paper... Read More about Thermo-mechanical Dynamics of Nanoimprinting Anti-Reflective Structures onto Small-core Mid- IR Chalcogenide Fibers.

Evaluating the cytotoxicity of Ge–Sb–Se chalcogenide glass optical fibres on 3T3 mouse fibroblasts (2021)
Journal Article

In vivo cancer detection based on the mid-infrared molecular fingerprint of tissue is promising for the fast diagnosis and treatment of suspected cancer patients. Few materials are mid-infrared transmissive, even fewer, which can be converted into fu... Read More about Evaluating the cytotoxicity of Ge–Sb–Se chalcogenide glass optical fibres on 3T3 mouse fibroblasts.

Bright Mid-Infrared (MIR) Photoluminescence Sources and their Application in Imaging and Sensing (2020)
Conference Proceeding

Mid-infrared (MIR) spectroscopy and imaging underpin many applications, ranging from industrial process monitoring to environmental analysis, and offer a new era in healthcare and clinical diagnostics. The spectral region from 1.5 to 12 μm is of inte... Read More about Bright Mid-Infrared (MIR) Photoluminescence Sources and their Application in Imaging and Sensing.

Experimental photoluminescence and lifetimes at wavelengths including beyond 7 microns in Sm3+-doped selenide-chalcogenide glass fibers (2020)
Journal Article

1000 ppmw Sm3+-doped Ge19.4Sb9.7Se67.9Ga3 atomic % chalcogenide bulk glass and unstructured fiber are prepared. Near- and mid-infrared absorption spectra of the bulk glass reveal Sm3+ electronic absorption bands, and extrinsic vibrational absorption... Read More about Experimental photoluminescence and lifetimes at wavelengths including beyond 7 microns in Sm3+-doped selenide-chalcogenide glass fibers.

Mid-infrared sources for biomedical applications based on chalcogenide glass fibres (2020)
Journal Article

Many important molecules show strong characteristic vibrational transitions in the mid-infrared (MIR) part of the electromagnetic spectrum. This leads to applications in spectroscopy, chemical and bio-molecular sensing, security and industry, especia... Read More about Mid-infrared sources for biomedical applications based on chalcogenide glass fibres.

High purity Ge-Sb-Se/S step index optical fibers (2019)
Journal Article

Chalcogenide glasses are a promising group of materials for remote sensing applications. Two compositions from the Ge-Sb-Se/S system are investigated as core and cladding glasses in a step index fiber (SIF). Following thermomechanical and refractive... Read More about High purity Ge-Sb-Se/S step index optical fibers.

Experimental observation of gain in a resonantly pumped Pr3+-doped chalcogenide glass mid-infrared fibre amplifier notwithstanding the signal excited-state absorption (2019)
Journal Article

We demonstrate a maximum gain of 4.6 dB at a signal wavelength of 5.28 μm in a 4.1 μm resonantly pumped Pr3+- doped selenide-based chalcogenide glass fibre amplifier of length 109 mm, as well as a new signal excited-stated absorption (ESA) at signal... Read More about Experimental observation of gain in a resonantly pumped Pr3+-doped chalcogenide glass mid-infrared fibre amplifier notwithstanding the signal excited-state absorption.

Determining the continuous thermo-optic coefficients of chalcogenide glass thin films in the MIR region using FTIR transmission spectra (2019)
Journal Article

A new method (FTIR continuous dn / dT method, n is refractive index and T temperature) for measuring the continuous thermo-optic coefficients of thin transparent films in the mid-infrared (MIR) spectral region is introduced. The technique is based on... Read More about Determining the continuous thermo-optic coefficients of chalcogenide glass thin films in the MIR region using FTIR transmission spectra.

(INVITED) Methods for determining the refractive indices and thermo-optic coefficients of chalcogenide glasses at MIR wavelengths (2019)
Journal Article

Chalcogenide glasses have attracted much attention for the realization of photonic components owing to their outstanding optical properties in the mid-infrared (MIR) region. However, relatively few refractive index dispersion data are presently avail... Read More about (INVITED) Methods for determining the refractive indices and thermo-optic coefficients of chalcogenide glasses at MIR wavelengths.

Mid-IR supercontinuum generation in birefringent, low loss, ultra-high numerical aperture Ge-As-Se-Te chalcogenide step-index fiber (2019)
Journal Article

This work reports on the fabrication and subsequent supercontinuum generation in a Ge-As-Se-Te/Ge-As-Se core/clad chalcogenide step-index fiber with an elliptical-core and an ultra-high numerical aperture of 1.88 ± 0.02 from 2.5 - 15 µm wavelength. T... Read More about Mid-IR supercontinuum generation in birefringent, low loss, ultra-high numerical aperture Ge-As-Se-Te chalcogenide step-index fiber.

Determining small refractive index contrast in chalcogenide-glass pairs at mid-infrared wavelengths (2019)
Journal Article

A two-composition thin film (Ge20Sb10Se70/Ge20Sb10Se67S3 atomic%core/cladding glasses) was fabricated using a hot-fibre-pressing technique in which both glasses follow the same post-fibre processing. A simple approach is proposed that uses normal inc... Read More about Determining small refractive index contrast in chalcogenide-glass pairs at mid-infrared wavelengths.