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

Abstract

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., .ltoreq.110.times.10.sup.-7 .degree.C..sup.-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.multidot.K, a thermal FOM=(1-.nu.).multidot.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.-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.

Inventors:
 [1];  [2]
  1. (Duryea, PA)
  2. (Danville, CA)
Issue Date:
OSTI Identifier:
866236
Patent Number(s):
4661284
Application Number:
06/779,916
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
silica; boron-containing; ultraphosphate; laser; glass; concentration; quenching; improved; thermal; shock; resistance; neodymium-doped; phosphate; glasses; refractive; index; 520; abbe; vd; 60; density; cm; expansion; coefficient; alpha; ltoreq; 110; times; 10; -7; degree; -1; modulus; 70; poisson; ratio; 28; conductivity; multidot; fom; 1-; consisting; essentially; mol; 40-70; sio; 0-20; 5-20; 5-35; na; 3-10; mgo; cao; sro; bao; zno; 0-10; preferably; containing; amount; effective; activity; emission; cross-section; sigma; -20; fluorescence; linewidth; delta; lambda; f1; 23; nm; e-folding; time; wt; 375; 175; self-concentration; rates; laser glass; shock resistance; preferably contain; improved thermal; thermal shock; expansion coefficient; thermal conductivity; consisting essentially; thermal expansion; refractive index; phosphate glass; phosphate glasses; preferably containing; phosphate laser; /252/501/

Citation Formats

Cook, Lee M., and Stokowski, Stanley E. Silica and boron-containing ultraphosphate laser glass with low concentration quenching and improved thermal shock resistance. United States: N. p., 1987. Web.
Cook, Lee M., & Stokowski, Stanley E. Silica and boron-containing ultraphosphate laser glass with low concentration quenching and improved thermal shock resistance. United States.
Cook, Lee M., and Stokowski, Stanley E. Tue . "Silica and boron-containing ultraphosphate laser glass with low concentration quenching and improved thermal shock resistance". United States. https://www.osti.gov/servlets/purl/866236.
@article{osti_866236,
title = {Silica and boron-containing ultraphosphate laser glass with low concentration quenching and improved thermal shock resistance},
author = {Cook, Lee M. and Stokowski, Stanley E.},
abstractNote = {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., .ltoreq.110.times.10.sup.-7 .degree.C..sup.-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.multidot.K, a thermal FOM=(1-.nu.).multidot.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.-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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {4}
}

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