RESEARCH ON NOVEL OPTICAL FIBRES AND WAVEGUIDES FOR TELECOM AND SENSOR DEVICES

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RESEARCH ON NOVEL OPTICAL FIBRES AND WAVEGUIDES
FOR TELECOM AND SENSOR DEVICES
Research team Dr. S. Shen, Dr. Li Huang, Dr.X.
Liu, Mr. P. Joshi, Mr. M. Javed, Mr.A . M.
Eagles
Prof. Animesh Jha Institute for Materials
Research, University of Leeds UK
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Equipment - optics/spectroscopy

• UV-vis-NIR (PE Lambda-19, 170-3200 nm)
• FTIR (PE 1700, 4000-400 cm-1)
• Abbe refractometer (1.3-1.7)
• 2 Ar lasers (5 W)
• Ti-Sapphire laser (660-1060 nm)
• He-Ne laser (633 nm, 5 mW)
• He-Ne laser (1553 nm, 2 mW)
• Macam Monochromator/detector (300-1700 nm)
• Digital data storage (DC-50 MHz)
• Refractive index characterisation
• Fibre drawing and glass fabrication facility
• Fluorimeter (300-2100 nm) with Time-resolved
  and cryogenic facilities
• Fibre Gain measurement facilities (1450-140 nm)
• Metricon Prism Coupler for thin-film and R.index
  characterisation

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Laboratories under development

• Pulsed laser deposition and laser-inorganic
  materials interaction laboratory to study
  material ablation, photodarkening and
  photochromic effects and optical nonlinearity
• Raman spectroscopy, site selection spectroscopic
  analysis lab to study structure, medium-range
  order, optical and acoustic phonons

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TeO2 Fibre Results from Nonlinear Fibres
(Leeds/Heriot-Watt University/ NORTEL project)
Fibre loss 1-2 dB/m at 1500 nm
Horizontal Output Profile
Vertical Output Profile

• Out profile from single-mode (10 micron) core
  Tellurium Oxide glass fibres for femto-second
  Kerr-gate switching. The device is required for
  high-speed data transmission.

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OBSERVED CHANGES IN THE MEASURED EMISSION IN
SINGLE-MODE FIBRES DTI/SMART AWARD
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New Modified Silicates for EDWAs and Passive
Devices Potential Gain 20dB over 40 nm
EPSRC/OSI Project with Heriot-Watt/THz Photonics
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Emission and Gain From RE-DOPED TeO2 Fibre

• Emission and Gain results from RE-ion doped
  Tellurite Fibres and silicate glasses for
  designing broadband amplifiers for enhancing the
  network bandwidth from 80 nm to 400 nm using the
  new fibres and planar amplifiers produced from
  TeO2 and SiO2 fibres and waveguides.

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Emission from Cr-ions in 1300 nm wavelength
region of 2nd Telecom window for amplifier design
at ZERO DISPERSION WAVELENGTH
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1st Ever Demonstration of Cr3 and Cr4 Emissions
at Room Temperature in a Glass Host for Lasers
and Amplifiers in 2nd telecom window EPSRC
Studentship
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Normalsied Amplification in a Nd-doped AlF3 Glass
Fibres for 2nd Telecom Window- EPSRC/OSI with
ORC Southampton, BT (now CRL)
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LEEDS/BATH University Collaboration in PCFs
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Laser/Material InteractionEPSRC/OSI and
EPSRC/EPPIC FARADAY

• Studies on Pulsed Laser deposition
• Waveguide Fabrication using high-power laser
• Laser Machining and surface modification