Efficient 2.0 μm emission in Nd3+/Ho3+ co-doped SiO2-Al2O3-Na2CO3-SrF2-CaF2 glasses for mid-infrared laser applications
Highlights: • The Ho{sup 3+} and Nd{sup 3+}/Ho{sup 3+} co-doped glasses were prepared by melt quenching method. • Nd{sup 3+} ions act as a good sensitizer for getting intense emission around at ∼2.0 μm. • The (σ{sup M}{sub emi}) emission cross-section has been found to be 3.85 × 10{sup −21} cm{sup 2}. • The energy transfer efficiency has been reached 50% from Nd{sup 3+} to Ho{sup 3+} ions. • The present glasses could be potential medium for ∼2.0 μm mid-infrared applications. - Abstract: Nd{sup 3+}/Ho{sup 3+} co-doped SiO{sub 2}-Al{sub 2}O{sub 3}-Na{sub 2}CO{sub 3}-SrF{sub 2}-CaF{sub 2}-Ho{sub 2}O{sub 3}-Nd{sub 2}O{sub 3} oxyfluorosilicate glasses have been prepared by high temperature melt-quenching method. The co-doped samples exhibit fluorescence bands centered at 892, 1058, 1330 nm and 2.0 μm under the excitation of 808 nm laser diode (LD). The energy transfer mechanism between Nd{sup 3+} and Ho{sup 3+} was analyzed based on the absorption, emission and the energy level structures of Nd{sup 3+} and Ho{sup 3+} ions. In the present investigation, the energy transfer efficiency from Nd{sup 3+} to Ho{sup 3+} reached ∼50% under the excitation of 808 nm. This result indicates that Nd{sup 3+} ions can be potentially used as sensitizers for Ho{sup 3+} ions to stimulate the NIR emissions. Stimulated emission cross-section was evaluated for the prominent {sup 5}I{sub 7} → {sup 5}I{sub 8} transition of Ho{sup 3+} ion by using the Mc-Cumber theory. The spectroscopic characteristics of Nd{sup 3+}/Ho{sup 3+} co-doped oxyfluorosilicate glasses are found to be suitable as optical medium for mid infrared emission at ∼2.0 μm.
- OSTI ID:
- 22804038
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 103; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM OXIDES
CALCIUM FLUORIDES
CROSS SECTIONS
DOPED MATERIALS
ENERGY LEVELS
ENERGY TRANSFER
FLUORESCENCE
GLASS
HOLMIUM IONS
HOLMIUM OXIDES
LASERS
NEODYMIUM IONS
NEODYMIUM OXIDES
QUENCHING
SILICON OXIDES
SODIUM CARBONATES
TEMPERATURE RANGE 0400-1000 K