Lithium Tantalate Crystal Development.
Abstract
Procedures for growth of high purity lithium tantalate boules are described, and methods for lowering the iron concentration in crystals are discussed. Field annealing of crystals was tested under various temperature - time - electric field conditions. In 24 hours at 1500 C and a current density of 0.05ma/sq cm, approximately 1 ppm of iron was removed from a crystal. The results of mass spectrometric and electron paramagnetic resonance analyses performed on the crystals are reported. The improved purity and high quality of these crystals make them suitable for Gigabit data rate electro-optic modulators. LiTa3 modulators possess a high dielectric Q, have a low absorption coefficient (<0.001 per cm) in the visible and at 1.06 mu, and are resistant to laser damage at room temperature for power levels in excess of 7 kw/sq cm. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1973
- Accession Number
- AD0913689
Entities
People
- Sarat C. Misro
- William J. Silva