Composition dependence of the microspectroscopy of Cr ions in double-clad Cr:YAG crystal fiber
Journal
Journal of Applied Physics
Journal Volume
99
Journal Issue
9
Date Issued
2006
Author(s)
Chen, J.-C.
Huang, K.-Y.
Tsai, C.-N.
Lin, Y.-S.
Lai, C.-C.
Liu, G.-Y.
Kao, F.-J.
Lo, C.-Y.
Shen, P.
Abstract
We have demonstrated the use of microspectroscopy for measuring the Cr 3+ and Cr4+ fluorescence spectra in double-clad Cr:YAG crystal fiber. The emission spectra of Cr3+ and Cr4+ are detected from core and inner cladding. The Cr3+ spectrum in the inner cladding shows a broad-band emission from 650 to 950 nm, while the emission of Cr4+ occurs in the range of 1.15-1.55 μm with a peak around 1.22 μm. The characteristic of Cr ion at high-field sites shows a narrow-band emission (2E →4A2 for Cr3+; 1E →3A2 for Cr4+), whereas that at low-field sites shows a broad-band emission (4T →4A2 for Cr3+; 3T →3A2 for Cr4+). The emission intensity ratio of high-field sites to low-field sites in the inner cladding with different compositions has been investigated. It varies from 20% to 29% for Cr3+ and from 7.1% to 11.3% for Cr4+ when the concentration of Si O2 increases from 26.9 to 43.0 wt %. © 2006 American Institute of Physics.
Other Subjects
Band structure; Cladding (coating); Electromagnetic wave emission; Emission spectroscopy; Fluorescence; Silica; Spectrum analysis; Broad band emission; Crystal fiber; Emission spectra; Chromium
Type
journal article