VARIATION OF REFRACTIVE INDEX DURING LASER OPERATION.
Abstract
High-resolution measurements have been made of the anomalous dispersion associated with the two Stark components of the R sub l absorption line in ruby. These preliminary measurements suggest that the R sub l dispersion obeys the Kronig-Kramers relations; however, it is superposed on a background which is itself anomalous because the refractive index increases with increasing wavelength. These measurements cover a wavelength interval of about 0.5 A, and the change in background index is of the order of 0.001 while the R sub l dispersion curve deviates from the background value by about 0.0001 at the maximum. A second surprising feature of the measurements is the observation that coherent radiation from a ruby laser, which was used to illuminate the ruby sample, is absorbed less in traversing the sample than would be expected on the basis of absorption measurements made with incoherent light. Highly accurate measurements have been made of the temperature dependence of the ruby laser emission between 63K and 116K and in a second interval between 196K and 207K. Light shielding is described which has been designed and tested to minimize pump light and ruby fluorescence at the detector in experiments with the sample optically pumped. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1965
- Accession Number
- AD0615422
Entities
People
- Harold A. Daw
- Jerald R. Izatt
- Robert C. Mitchell
Organizations
- New Mexico State University