Laser induced refractive index changes in lithium niobate doped with cobalt
Estle, Thomas L.
Master of Arts
The optical spectra of lithium niobate doped with cobalt were observed at room temperature and 77K. The absorption bands were identified using a theoretical energy level diagram. EPR spectra were obtained at 9 GHz and 4.2K. The observed spectra were explained with an axial spin Hamiltonian with an effective spin of 1/2. Holographic techniques were used to measure the laser-induced refractive index change at 514.5 and 488. nm. The holographic equipment and its operation are described in some detail.