AASERT: Optical Characterization of Diamond Films for Superconducting.
Abstract
We have discovered and have characterized a new nonlinear optical effect. The effect is studied in a strontium barium niobate substrate material but should be observable in diamond photorefractive substrates as well. We show that a quasi-steady-state photorefractive spatial soliton forms a waveguide structure in the bulk of a photorefractive material. Although the optically induced waveguide is formed by a very low power (microwatts) soliton beam, it can guide a powerful (watt) beam of a longer wavelength at which the medium is nonphotosensitive. Furthermore, the waveguide survives, either in the dark or when guiding the longer wavelength beam, for a long time after the soliton beam is turned off. We take advantage of the solitons' property of evolution from a relatively broad input beam into a narrow channel and show that the soliton induces a tapered waveguide (an optical funnel) that improves the coupling efficiency of light into the waveguiding structure.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 24, 1996
- Accession Number
- ADA308961
Entities
People
- Min Xiao
Organizations
- University of Arkansas