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Grating Writing Through the Polyimide Fibre Coating with Femtosecond IR Radiation and a Phase Mask
Grating Writing Through Polyimide Fibre Coating Femtosecond IR Radiation
2015/8/4
Fibre Bragg gratings were written through the polyimide coating of commercial high NA fibres with ultrafast 800 nm radiation. Index modulations =2X10 -4 remain after 140 hours at 360°C.
Visible luminescence and upconversion processes in Bi-doped silica- based fibers pumped by IR radiation
Visible luminescence upconversion processes Bi-doped fibers pumped IR radiation
2015/7/31
The anti-Stokes visible luminescence and upconversion processes in Bi-doped silica-based fibers were investigated. The upconversion coefficients, absorption cross-sections and concentrations of bismut...