Silica and boron-containing ultraphosphate laser glass with low concentration quenching and improved thermal shock resistance

Patent · Tue Apr 28 04:00:00 EDT 1987

OSTI ID:7002313

Cook, L M; Stokowski, S E

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
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers &amp; Masers-- (1990-)
ALKALI METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL COMPOSITION
DOPED MATERIALS
GLASS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LASER MATERIALS
LASERS
LITHIUM COMPOUNDS
LITHIUM OXIDES
MATERIALS
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHOSPHATE GLASS
PHYSICAL PROPERTIES
POTASSIUM COMPOUNDS
POTASSIUM OXIDES
RARE EARTH COMPOUNDS
SILICON COMPOUNDS
SILICON OXIDES
SODIUM COMPOUNDS
SODIUM OXIDES
SOLID STATE LASERS