Richard P. Tumminelli

Integrated-optic Nd:glass laser fabricated by flame hydrolysis deposition using chelates

We have demonstrated an Nd:glass waveguide laser deposited on a silica substrate by flame hydrolysis deposition using chelates. Continuous-wave lasing at lambda = 1062 nm was verified with a threshold of 143 mW and a slope efficiency of 2.1% when the laser was pumped at 807 nm. The flame hydrolysis deposition process using rare-earth chelates produces low-loss films with high Nd concentration and is suitable for multiple rare-earth doping.

Stable second-order nonlinearity in SiO2-based waveguides on Si using temperature/electric-field poling

A stable second-order nonlinearity established by temperature/electric-field poling of a SiO2-based waveguide stack on a Si substrate with a nonlinearity comparable to that observed in bulk fused silica samples (approximately 1 pm/V) is described. Samples with various layer thickness and composition are compared to determine important parameters in generating the second-order nonlinearity. Temperature and voltage studies are also presented to help understand the dynamics of the nonlinearity.