A K KarSummaryAffiliation: Heriot-Watt University Country: UK Publications
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Publications
Quantum dot enabled thermal imaging of optofluidic devicesDebaditya Choudhury
SUPA, School of Engineering and Physical Sciences, Heriot Watt University, Edinburgh, UK
Lab Chip 12:2414-20. 2012..We also report on the thermal imaging of locally illuminated microchannels when filled with nano-heating particles such as carbon nanotubes...
Femtosecond laser inscription of optical waveguides in Bismuth ion doped glassN D Psaila
Physics, School of Engineering and Physical Sciences, Heriot Watt University, Riccarton, Edinburgh, EH14 4AS, Scotland
Opt Express 14:10452-9. 2006..3 x 10(-3) are observed, allowing the fabrication of waveguides nearly mode-matched to telecom fibers. When optically pumped at 980 and 810 nm broadband fluorescence emission centered at 1.3 microm with a FWHM of up to 500 nm is detected...- Multiple rare earth emissions in a multicore tellurite fiber with a single pump wavelengthH T Bookey
Nonlinear Optics Group, Heriot Watt University, Edinburgh EH14 4AS, UK
Opt Express 15:17554-61. 2007..4 microm, 1.5 microm, 1.9 microm and 2.05 microm when pumped at a wavelength of 980 nm. The prospects for multi-band amplifiers and lasers are discussed... - Strain field manipulation in ultrafast laser inscribed BiB3O6 optical waveguides for nonlinear applicationsS J Beecher
Scottish Universities Physics Alliance, School of Engineering and Physical Sciences, Heriot Watt University, Edinburgh, EH14 4AS, UK
Opt Lett 36:4548-50. 2011..The waveguide with the optimal mode overlap was used for type I birefringently phase-matched second-harmonic generation of a continuous wave laser source at 1047 nm... - Compact, highly efficient ytterbium doped bismuthate glass waveguide laserR Mary
Scottish Universities Physics Alliance, School of Engineering and Physical Sciences, Department of Physics, Heriot Watt University, Edinburgh, UK
Opt Lett 37:1691-3. 2012..The simultaneous achievement of low propagation losses and preservation of the fluorescence properties of ytterbium ions is the basis of the outstanding laser performance... - Lasing action at around 1.9 μm from an ultrafast laser inscribed Tm-doped glass waveguideF Fusari
Scottish Universities Physics Alliance, J F Allen Physics Research Laboratories, School of Physics and Astronomy, University of St Andrews, St Andrews, KY16 9SS, Scotland, UK
Opt Lett 36:1566-8. 2011..91 μm. This waveguide laser exhibited a maximum slope efficiency of 6% and a maximum output power of 32 mW when pumped with 620 mW of incident laser power... - Ultrafast laser inscription of near-infrared waveguides in polycrystalline ZnSeJ R MacDonald
Scottish Universities Physics Alliance, School of Engineering and Physical Sciences, Department of Physics, David Brewster Building, Heriot Watt University, Edinburgh, EH14 4AS, UK
Opt Lett 35:4036-8. 2010..55 μm. Propagation losses were characterized at 1.55 μm using the Fabry-Perot technique and found to be 1.07 dB · cm(-1) ± 0.03 dB · cm(-1)... - Shaping ultrafast laser inscribed optical waveguides using a deformable mirrorR R Thomson
School of Engineering and Physical Sciences, David Brewster Building, Heriot Watt University, Edinburgh EH14 4AS, Scotland
Opt Express 16:12786-93. 2008..5 dB.cm(-1). This technique promises the possibility of combining rapid processing speeds with the ability to vary the waveguide cross section along its length... - Direct laser writing of near-IR step-index buried channel waveguides in rare earth doped YAGA Rodenas
School of Engineering and Physical Sciences, Heriot Watt University, Edinburgh, UK
Opt Lett 36:3395-7. 2011..51 μm wavelength have been preliminarily obtained. Confocal microluminescence mapping reveals that the increased refractive index regions retain the near-IR spectral properties of Er3+ ions in the YAG crystalline matrix... - Ultrafast laser inscription of an integrated photonic lanternR R Thomson
Scottish Universities Physics Alliance SUPA, School of Engineering and Physical Sciences, Physics Department, David Brewster Building, Heriot Watt University, Edinburgh, EH14 4AS, Scotland
Opt Express 19:5698-705. 2011..0 dB, assuming the input coupling losses are zero. Such devices have applications in astrophotonics and remote sensing...