US5004707A
Expired / Lapsed
US
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Lightwave guide produced from special substrate glasses by ion exchange against CS+ ions
Assignee: Schott AG
•
Filing: 1989-11-16
•
Granted: 1991-04-02
•
Expires: 2009-11-16
Abstract
Abstract Production of mono- or multimodal lightwave guides from special substrate glasses of the glass system SiO2-B2O3-Al2O3- K2O-F-, with partial exchange of the Li+, Na+, and/or K+ ions present in the glass against Cs+ ions, the substrate glasses having the following compositions (in mol.-%): SiO2 45-72, B2O3 8-25, Al2O3 1-25, Li2O 0-1, Na2O 0-2, K2O 6-18, MO 0-1 (MO=MgO, CaO, SrO, BaO, ZnO, PbO), in which a portion of the O- ions present in the glass are replaced by 1-15 mol % F- ions.
Inventors
- 👤 Ludwig Ross
- 👤 Werener Schumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:49
CPC Classifications
C; C03; C03C; C03C21/00; C03C21/001; C03C21/002; C03C13/00; C03C13/04; C03C13/045; C03C13/046; C03C3/00; C03C3/04; C03C3/062; C03C3/064; G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/13; G02B6/134; G02B6/1345
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
123 words
Lightwave guide, characterized in that it is produced from a substrate glass consisting essentially of the following composition, in mol %: ______________________________________
SiO.sub.2
45-72
B.sub.2 O.sub.3
8-25
Al.sub.2 O.sub.3
1-25
Li.sub.2 O
0-1
Na.sub.2 O
0-2
K.sub.2 O
6-18
MO 0-1
______________________________________ (MO=MgO, CaO, SrO, BaO, ZnO, PbO), in which a portion of the O 2- ions present in the glass is replaced by 1-15 mol % F - ions to facilitate diffusion of Cs + ions therein, and in which a lightwave conductive zone has been produced by incorporating Cs + ions into the substrate glass by an ion-exchange of K + , Li + and/or Na + ions against Cs + ions to effect a refractive index gradient within the glass.
Claim 2
Dependent Claim
123 words
Lightwave guide, characterized in that it is produced from a substrate glass consisting essentially of the following composition, in mol %: ______________________________________
SiO.sub.2
45-72
B.sub.2 O.sub.3
8-25
Al.sub.2 O.sub.3
1-25
Li.sub.2 O
0-1
Na.sub.2 O
0-2
K.sub.2 O
6-18
MO 0-1
______________________________________ (MO=MgO, CaO, SrO, BaO, ZnO, PbO), in which a portion of the O 2- ions present in the glass is replaced by 1-15 mol % F - ions to facilitate diffusion of Cs + ions therein, and in which a lightwave conductive zone has been produced by incorporating Cs + ions into the substrate glass by an ion-exchange of K + , Li + and/or Na + ions against Cs + ions to effect a refractive index gradient within the glass.
Claim 3
Dependent Claim
88 words
Lightwave guide according to claim 1, wherein the substrate glass additionally contains a combined total of at most 5 mol % of at least one oxide selected from the group consisting of TiO 2 , ZrO 2 , P 2 O 5 , GeO 2 , Y 2 O 3 , La 2 O 3 , Nb 2 O 5 , Ta 2 O 5 , WO 3 , SnO 2 , As 2 O 3 , Sb 2 O 3 , and Bi 2 O 3 .
Claim 4
Dependent Claim
21 words
Lightwave guide according to claim 1, wherein the substrate glass contains less than 10 mol % Al 2 O 3 .
Claim 5
Dependent Claim
19 words
Lightwave guide according to claim 1, wherein the substrate glass contains 10-25 mol % Al 2 O 3 .
Claim 6
Dependent Claim
18 words
Lightwave guide according to claim 1, wherein the substrate glass additionally contains 0.1-2 mol % Cs 2 O.
Claim 7
Dependent Claim
35 words
Lightwave guide according to claim 1, wherein the molar ratio of Al 2 O 3 :M 2 O (M 2 O=Li 2 O, Na 2 O, K 2 O, Cs 2 O) is about 0.8-1.2.
Claim 8
Dependent Claim
16 words
Lightwave guide according to claim 1, wherein the lightwave conducting zone is below the glass surface.
Claim 9
Dependent Claim
57 words
Lightwave guide according to claim 1, wherein the substrate glass consists essentially of the following composition, in mol %: ______________________________________
SiO.sub.2 53-63
B.sub.2 O.sub.3 8-19
Al.sub.2 O.sub.3
5-20
K.sub.2 O 12-18
F.sup.- 5-7.5
Na.sub.2 O + Li.sub.2 O
0-2
______________________________________ wherein the K 2 O content is at least 80% of the Al 2 O 3 content.
Claim 10
Dependent Claim
50 words
Lightwave guide according to claim 8, wherein the substrate glass consists essentially of the following composition, in mol %: ______________________________________
SiO.sub.2
59.3
B.sub.2 O.sub.3
18.0
Al.sub.2 O.sub.3
5.2
K.sub.2 O
17.5
______________________________________ in which a portion of the oxygen ions are replaced by the addition of 6.8% F - ions.
Claim 11
Dependent Claim
56 words
Lightwave guide according to claim 8, wherein the substrate glass consists essentially of the following composition, in mol %: ______________________________________
SiO.sub.2
54.2
B.sub.2 O.sub.3
18.5
Al.sub.2 O.sub.3
9.9
K.sub.2 O
15.6
Na.sub.2 O
1.4
Li.sub.2 O
0.4
______________________________________ in which a portion of the oxygen ions are replaced by the addition of 6.5% F - ions.
Claim 12
Dependent Claim
18 words
Lightwave guide according to claim 10, wherein the lightwave conducting zone is 20-30 um below the glass surface.
Claim 13
Dependent Claim
50 words
Lightwave guide according to claim 8, wherein the substrate, glass consists essentially of the following composition, in mol %: ______________________________________
SiO.sub.2
69.9
B.sub.2 O.sub.3
12.0
Al.sub.2 O.sub.3
12.5
K.sub.2 O
12.5
______________________________________ in which a portion of the oxygen ions are replaced by the addition of 6.26% F - ions.
Claim 14
Dependent Claim
53 words
Lightwave guide according to claim 8, wherein the substrate, glass consists essentially of the following composition, in mol %: ______________________________________
SiO.sub.2
53.5
B.sub.2 O.sub.3
8.03
Al.sub.2 O.sub.3
19.5
K.sub.2 O
18.0
Na.sub.2 O
1.0
______________________________________ in which a portion of the oxygen ions are replaced by the addition of 7.22% F - ions.
Claim 15
Dependent Claim
18 words
Lightwave guide according to claim 13, wherein the lightwave conducting zone is 20-30 um below the glass surface.
Claim 16
Dependent Claim
23 words
Lightwave guide according to claim 1, wherein the K 2 O content is at least 80% of the Al 2 O 3 content.
Claim 17
Dependent Claim
27 words
Lightwave guide according to claim 15, wherein the molar ratio Al 2 O 3 :M 2 O, wherein M 2 O is total alkali metal, is 0.8-1.2.
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