Journal
OPTICAL MATERIALS EXPRESS
Volume 1, Issue 5, Pages 845-855Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.1.000845
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Funding
- NSF [DMR-0305202, NSF-DMR 0801786, NSF-CMMI 0825572]
- Direct For Mathematical & Physical Scien [0801786] Funding Source: National Science Foundation
- Division Of Materials Research [0801786] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0825572] Funding Source: National Science Foundation
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We have studied the relationship between the initial glass composition and the structural changes associated with laser-induced refractive index modification in a series of Er-Yb doped and undoped zinc phosphate glasses. White light microscopy and waveguide experiments are used together with Raman and fluorescence spectroscopy to characterize the structural changes. The correlation between Raman peak shifts and fluorescence from phosphorus-oxygen hole center (POHC) defects indicates that fs-laser writing results in a depolymerization of the phosphate glass network. The results also show that the exact glass composition should be taken into account when fabricating waveguide devices in phosphate glasses, in order to both expand the fs-laser processing conditions and maximize favorable morphological changes for 3-D photonic devices. (C) 2011 Optical Society of America
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