Outputs (40)

Spectral broadening in femtosecond laser written waveguides in chalcogenide glass (2009)
Journal Article
Hughes, M., Yang, W., & Hewak, D. (2009). Spectral broadening in femtosecond laser written waveguides in chalcogenide glass. Journal of the Optical Society of America B, 26(7), 1370-1378. https://doi.org/10.1364/JOSAB.26.001370

Nonlinear spectral broadening to 200 nm, from an initial width of 50 nm, has been demonstrated in gallium lanthanum sulphide glass waveguides from 1540 nm, 200 fs pulses at 30 nJ/pulse. A formation mechanism is presented for these femtosecond laser... Read More about Spectral broadening in femtosecond laser written waveguides in chalcogenide glass.

Spectroscopy of titanium-doped gallium lanthanum sulfide glass (2008)
Journal Article
lanthanum sulfide glass. Journal of the Optical Society of America B, 25(9), 1458-1465. https://doi.org/10.1364/JOSAB.25.001458

Titanium-doped gallium lanthanum sulfide (Ti:GLS) and gallium lanthanum oxysulfide (Ti:GLSO) glasses have an absorption band at ∼500–600 nm that cannot be fully resolved because of its proximity to the band edge of the glass. At concentrations >0.5%... Read More about Spectroscopy of titanium-doped gallium lanthanum sulfide glass.

Advanced bismuth-doped lead-germanate glass for broadband optical gain devices (2008)
Journal Article
broadband optical gain devices. Journal of the Optical Society of America B, 25(8), 1380-1386. https://doi.org/10.1364/JOSAB.25.001380

We fabricated a series of glasses with the composition 94.7- ͓GeO2-5Al2O3-0.3Bi2O3-͓PbO ( ͓ = 0–24 mol. %) Characteristic absorption bands of bismuth centered at 500, 700, 800, and 1000 nm were observed. Adding PbO was found to decrease the strengt... Read More about Advanced bismuth-doped lead-germanate glass for broadband optical gain devices.

Modified chalcogenide glasses for optical device applications (2007)
Thesis
Hughes, M. (in press). Modified chalcogenide glasses for optical device applications. (Thesis). University of Southampton

This thesis focuses on two different, but complementary, aspects of the modification of gallium lanthanum sulphide (GLS) glasses. Firstly the addition of transition metal ions as dopants is examined and their potential for use as active optical mat... Read More about Modified chalcogenide glasses for optical device applications.

Concentration dependence of the fluorescence decay profile in transition metal doped chalcogenide glass (2007)
Journal Article
Hughes, M., Hewak, D., & Curry, R. (2007). Concentration dependence of the fluorescence decay profile in transition metal doped chalcogenide glass. Proceedings of SPIE, 6469, https://doi.org/10.1117/12.699134

In this paper we present the fluorescence decay profiles of vanadium and titanium doped gallium lanthanum sulphide (GLS) glass at various doping concentrations between 0.01 and 1% (molar). We demonstrate that below a critical doping concentration t... Read More about Concentration dependence of the fluorescence decay profile in transition metal doped chalcogenide glass.

Spectroscopy of vanadium (III) doped gallium lanthanum sulphide chalcogenide glass (2007)
Journal Article
chalcogenide glass. Applied Physics Letters, 90, 031108. https://doi.org/10.1063/1.2432280

Vanadiumdopedgalliumlanthanum sulphide glass (V:GLS) displays three absorption bands at 580, 730, and 1155nm identified by photoluminescence excitation measurements. Broad photoluminescence, with a full width at half maximum of ∼500nm , is observed... Read More about Spectroscopy of vanadium (III) doped gallium lanthanum sulphide chalcogenide glass.

Fabrication and characterization of femtosecond laser written waveguides in chalcogenide glass (2007)
Journal Article
Hughes, M., Yang, W., & Hewak, D. (2007). Fabrication and characterization of femtosecond laser written waveguides in chalcogenide glass. Applied Physics Letters, 90, 131113. https://doi.org/10.1063/1.2718486

The authors describe the fabrication of buried waveguides in a highly nonlinear chalcogenide glass, gallium lanthanum sulfide, using focused femtosecond laser pulses. Through optical characterization of the waveguides, they have proposed a formatio... Read More about Fabrication and characterization of femtosecond laser written waveguides in chalcogenide glass.

Optical and electronic properties of bismuth-implanted glasses
Journal Article
Hughes, M., Federenko, Y., Lee, T., Yao, J., Gholipour, B., Gwilliam, R., …Curry, R. Optical and electronic properties of bismuth-implanted glasses. https://doi.org/10.1117/12.2036933

Photoluminescence (PL) and excitation spectra of Bi melt-doped oxide and chalcogenide glasses are very similar, indicating the same Bi center is present. When implanted with Bi, chalcogenide, phosphate and silica glasses, and BaF2 crystals, all displ... Read More about Optical and electronic properties of bismuth-implanted glasses.

On the analogy between photoluminescence and carrier-type reversal in Bi- and Pb-doped glasses
Journal Article
carrier-type reversal in Bi- and Pb-doped glasses. Optics express, 21(7), 8101-8115. https://doi.org/10.1364/OE.21.008101

Reaction order in Bi-doped oxide glasses depends on the optical basicity of the glass host. Red and NIR photoluminescence (PL) bands result from Bi2+ and Bin clusters, respectively. Very similar centers are present in Bi- and Pb-doped oxide and ch... Read More about On the analogy between photoluminescence and carrier-type reversal in Bi- and Pb-doped glasses.

Compositional dependence of the optical properties of bismuth doped lead-aluminum-germanate glass
Journal Article
Hughes, M., Suzuki, T., & Ohishi, Y. (in press). Compositional dependence of the optical properties of bismuth doped lead-aluminum-germanate glass. Optical Materials, 32(9), 1028-1034. https://doi.org/10.1016/j.optmat.2010.02.025

We report the compositional dependence of absorption, emission, decay constant and quantum efficiency (QE) of GeO2:Al2O3:PbO:Bi2O3 glass with the aim of finding the composition most suitable for a laser gain medium. As the Bi2O3 content was varied... Read More about Compositional dependence of the optical properties of bismuth doped lead-aluminum-germanate glass.