Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1541812 | Optics Communications | 2007 | 5 Pages |
Abstract
Experimental observation of phase (i.e. refractive index) component in the dynamic gratings recorded in erbium-doped optical fiber with saturation of optical absorption is reported. We utilized configuration of transient two-wave mixing with rectangular phase modulation of one of counterpropagating recording waves, where unshifted phase grating resulted in a transient energy exchange. The reported experiments were performed with heavily doped (â5400Â ppm erbium) fibers in a wide spectral range of Er3+ fundamental absorption at selected laser wavelengths 1492, 1526, 1549, and 1568Â nm. Relative contribution of phase grating was especially large (up to â100% of the maximal amplitude component) at the opposite sides of the investigated spectral range and was significantly lower in its central part. The amplitude grating was found especially strong at short wavelength side of the spectrum (i.e. at 1492Â nm), where the grating amplitude proved to be only two times lower than the theoretically predicted from consideration of two-level model.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Serguei Stepanov, Eliseo Hernández Hernández,