Songbae Moon

All fiber polarimetric modulation using an electro-optic fiber with internal Pb-Sn electrodes

All fiber electro-optic modulation using a polarimetric cell based on an electro-optic fiber with internal Pb-Sn electrodes was demonstrated. For the polarimetric cell, the electro-optic fiber with two 149 cm long internal electrodes was fabricated by injection of a molten Pb-Sn alloy into the holes of the fiber. The characteristics of the modulation were explained by the electric field induced phase retardation due to the polarization dependent electro-optic Kerr effect. The difference in the effective second order nonlinearity between TM and TE polarization directions was obtained to be 0.0035 pm/V at the applied DC voltage of 6.5 kV.

Linear and Nonlinear Optical Properties of Si Nanoparticles/ Er-Ions Doped Optical Fiber

An alumino-germano-silica glass fiber doped with silicon nanoparticles and erbium ions was fabricated using the modified chemical vapor deposition (MCVD) method. Optical properties of the glass fiber were investigated using a Judd-Ofelt analysis. It was found that incorporating silicon nanoparticles with erbium ions did not alter Er-related optical properties of the silica glass fiber. The incorporation of silicon particles in a fiber core caused wide band absorption from 480 nm to 1200 nm. A third order optical nonlinearity of the Si-Er-doped alumino-germano-silica glass fiber was measured to be about 3.8 x 10-15 m2/W.

Visible Wavelength Emission in the Silica Glass Fiber Doped with Silicon Nano-particles

We report realization of a novel optical fiber incorporated with Si nano-particles and its emission in the visible wavelength upon pumping at 512nm. Enhancement in 1550nm emission of the Si/Er3+ co-doped fiber was also found.

Absorption and Emission Properties of Er 3+ -Doped Glass Optical Fiber Sensitized by Silicon Particles

The glass optical fiber doped with Er3+ and silicon as a sensitizer was fabricated. Upon pumping at 512nm, photoluminescence was observed near 770nm and 1550nm with 70 % increase of the intensity at 1550nm.