Silica and boron-containing ultraphosphate laser glass with low concentration quenching and improved thermal shock resistance
Disclosed is a neodymium-doped phosphate glasses having a refractive index, nd>1.520; an Abbe number, Vd, <60; a density <3.0 g/cm[sup 3], a thermal expansion coefficient, [alpha], [<=]110 [times] 10[sup [minus]7] C[sup [minus]1]; a Young's Modulus, E, <70 [times] 10[sup 3] N/mm[sup 2]; a Poisson's Ratio, [nu], <0.28; a thermal conductivity, K, >0.5 W/m[hor ellipsis]K, a thermal FOM=(1[minus][nu])[hor ellipsis]K/[alpha]E>0.7, consisting essentially of, in mol. %: P[sub 2]O[sub 5] : 40--70% SiO[sub 2]: 0--20% B[sub 2]O[sub 3]: 5--20% Sum SiO[sub 2] +B[sub 2]O[sub 3]: 5--35% Sum Li[sub 2]O+Na[sub 2]O+K[sub 2]O: 5--20% Sum La[sub 2]O[sub 3]+Nd[sub 2]O[sub 3]: 3--10% Sum MgO+CaO+SrO+BaO+ZnO: 0--10% and preferably containing an amount of Nd[sub 2]O[sub 3] effective for laser activity having an emission cross-section, [sigma], >3.5[times]10[sup [minus]20] cm[sup 2]; a fluorescence linewidth ([Delta][lambda][sub f1])<23.5 nm; a first e-folding time of the Nd[sup 3+] fluorescence at 0.5 wt. % Nd[sub 2]O[sub 3]>375 [mu]sec, and a first e-folding time of the Nd[sup 3+] fluorescence at 10 wt. % >175 [mu]sec at 10 wt. %, have very low self-concentration quenching rates.
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- Patent Number(s):
- US 4661284; A
- Application Number:
- PPN: US 6-779916
- OSTI ID:
- 7002313
- Resource Relation:
- Patent File Date: 25 Sep 1985
- Country of Publication:
- United States
- Language:
- English
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Silica and boron-containing ultraphosphate laser glass with low concentration quenching and improved thermal shock resistance
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Related Subjects
LASER MATERIALS
CHEMICAL COMPOSITION
SOLID STATE LASERS
DOPED MATERIALS
LANTHANUM OXIDES
LITHIUM OXIDES
NEODYMIUM OXIDES
OPTICAL PROPERTIES
PHOSPHATE GLASS
POTASSIUM OXIDES
SILICON OXIDES
SODIUM OXIDES
ALKALI METAL COMPOUNDS
CHALCOGENIDES
GLASS
LANTHANUM COMPOUNDS
LASERS
LITHIUM COMPOUNDS
MATERIALS
NEODYMIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POTASSIUM COMPOUNDS
RARE EARTH COMPOUNDS
SILICON COMPOUNDS
SODIUM COMPOUNDS
426002* - Engineering- Lasers & Masers- (1990-)