US4740975A
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Congruently melting complex oxides
Assignee: Nokia Bell Labs
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Filing: 1987-04-01
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Granted: 1988-04-26
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Expires: 2007-04-01
Abstract
Abstract The invention involves the finding that the congruent composition of any complex oxide is non-stoichiometric.
Inventors
- 👤 Sidney C. Abrahams
- 👤 Charles D. Brandle, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:23
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B15/00; C30B29/28; H; H01; H01S; H01S3/00; H01S3/14; H01S3/16
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
54 words
A device, comprising: a material including a complex oxide, characterized in that said complex oxide is essentially free of gadolinium scandium gallium garnet, gadolinium gallium garnet and lithium niobate, and the composition of said complex oxide is congruent and differs form stoichiometry by at least 0.1 atomic percent for at least one constituent element.
Claim 2
Independent Claim
54 words
A device, comprising: a material including a complex oxide, characterized in that said complex oxide is essentially free of gadolinium scandium gallium garnet, gadolinium gallium garnet and lithium niobate, and the composition of said complex oxide is congruent and differs form stoichiometry by at least 0.1 atomic percent for at least one constituent element.
Claim 3
Dependent Claim
22 words
The device of claim 1 wherein said complex oxide exhibits a single chemical phase continuously between its melting temperature and 300° K.
Claim 4
Dependent Claim
30 words
The device of claim 1, wherein said device comprises a solid state laser having an active medium, said active medium including a host of said material including said complex oxide.
Claim 5
Dependent Claim
12 words
The device of claim 1, wherein said device is a polarization rotator.
Claim 6
Dependent Claim
12 words
The device of claim 1, wherein said device is an optical isolator.
Claim 7
Dependent Claim
25 words
The device of claim 1, wherein said device is a cathode ray tube having a face plate which includes said material including said complex oxide.
Claim 8
Dependent Claim
12 words
The device of claim 1, wherein said device is a frequency doubler.
Claim 9
Dependent Claim
73 words
A solid state laser, comprising: an optical cavity resonator; an active medium located within said resonator, said active medium including a single crystal lanthanum magnesium aluminate host doped with activator; and means for supplying pumping energy to said medium to generate a population inversion therein and stimulated emission of optical radiation therefrom, characterized in that in the absence of said activator, said lanthanum magnesium aluminate host has the composition La.sub.0.95±0.01 Mg Al.sub.11.05±0.04 O.sub.19.
Claim 10
Dependent Claim
73 words
A solid state laser, comprising: an optical cavity resonator; an active medium located within said resonator, said active medium including a single crystal lanthanum magnesium aluminate host doped with activator; and means for supplying pumping energy to said medium to generate a population inversion therein and stimulated emission of optical radiation therefrom, characterized in that in the absence of said activator, said lanthanum magnesium aluminate host has the composition La.sub.0.95±0.01 Mg Al.sub.11.05±0.04 O.sub.19.
Claim 11
Dependent Claim
23 words
The solid state laser of claim 8 wherein, in the absence of said activator, said host has the composition La.sub.0.950 Mg Al.sub.11.050 O.sub.19.
Claim 12
Dependent Claim
12 words
The solid state laser of claim 8 wherein said activator comprises neodymium.
Claim 13
Independent Claim
85 words
A method for fabricating a device, comprising the steps of: forming a crystal of a complex oxide; and completing fabrication of said device, said completing including the step of incorporating at least a portion of said crystal into said device, characterized in that said complex oxide is essentially free of gadolinium scandium gallium garnet, gadolinium gallium garnet and lithium niobate, and the composition of said complex oxide is congruent and differs from stoichiometry by at least 0.1 atomic percent for at least one constituent element.
Claim 14
Independent Claim
85 words
A method for fabricating a device, comprising the steps of: forming a crystal of a complex oxide; and completing fabrication of said device, said completing including the step of incorporating at least a portion of said crystal into said device, characterized in that said complex oxide is essentially free of gadolinium scandium gallium garnet, gadolinium gallium garnet and lithium niobate, and the composition of said complex oxide is congruent and differs from stoichiometry by at least 0.1 atomic percent for at least one constituent element.
Claim 15
Dependent Claim
22 words
The method of claim 11 wherein said complex oxide exhibits a single chemical phase continuously between its melting temperature and 300° K.
Claim 16
Dependent Claim
52 words
A composition of matter, comprising: a complex oxide, characterized in that said complex is essentially free of gadolinium scandium gallium garnet, gadolinium gallium garnet and lithium niobate, and the composition of said complex oxide is congruent and differs from stoichiometry by at least 0.1 atomic percent for at least one constituent element.
Claim 17
Dependent Claim
52 words
A composition of matter, comprising: a complex oxide, characterized in that said complex is essentially free of gadolinium scandium gallium garnet, gadolinium gallium garnet and lithium niobate, and the composition of said complex oxide is congruent and differs from stoichiometry by at least 0.1 atomic percent for at least one constituent element.
Claim 18
Dependent Claim
24 words
The composition of matter of claim 13 wherein said complex oxide exhibits a single chemical phase continuously between its melting temperature and 300° K.
Claim 19
Dependent Claim
31 words
The composition of matter of claim 13, wherein said complex oxide comprises lanthanum magnesium aluminate (LMA), the composition of said LMA being La 0 .95±0.01 MgAl 11 .05±0.04 O 19 .
References Cited (Backward Citations)
No citation records indexed.
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