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US4726652A
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Faraday rotation single-mode optical fiber
Assignee: Hoya Corp
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Filing: 1986-12-29
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Granted: 1988-02-23
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Expires: 2006-12-29
Abstract
Abstract A Faraday rotation single-mode fiber having a high Verdet constant is disclosed, the core and the cladding of the fiber being made of a glass having the following composition: 26 to 38 mol % SiO 2 , 18 to 34 mol % B 2 O 3 , 17 to 26 mol % Al 2 O 3 , 18 to 32 mol % Tb 2 O 3 , 0 to 5 mol % ZrO 2 , 0 to 5 mol % Ce 2 O 3 , 0 to 5 mol % Pr 2 O 3 , 0 to 5 mol % Dy 2 O 3 and 0 to 5 mol % Ho 2 O 3 , provided that the total amount of the above ingredients is not less than 97 mol % and the total amount of Ce 2 O 3 , Pr 2 O 3 , Dy 2 O 3 and Ho 2 O 3 is 0 to 5 mol %.
Inventors
- 👤 Hidemi Tajima
- 👤 Toshiharu Yamashita
- 👤 Isao Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:09
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/105; C; C03; C03C; C03C13/00; C03C13/04; C03C13/045; C03C13/046; G02F; G02F1/00; G02F1/0009; G02F1/0036
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
130 words
A Faraday rotation single-mode fiber having a core and a cladding which are made of a glass having a composition comprising: ______________________________________
SiO.sub.2 26 to 38 mol %,
B.sub.2 O.sub.3 18 to 34 mol %,
Al.sub.2 O.sub.3 17 to 26 mol %,
Tb.sub.2 O.sub.3 18 to 32 mol %,
ZrO.sub.2 0 to 5 mol %,
Ce.sub.2 O.sub.3 0 to 5 mol %,
Pr.sub.2 O.sub.3 0 to 5 mol %,
Dy.sub.2 O.sub.3 0 to 5 mol %, and
Ho.sub.2 O.sub.3 0 to 5 mol %,
______________________________________ provided that the total amount of the above ingredients is less than 97mol % and the total amount of Ce 2 O 3 , Pr 2 O 3 , Dy 2 O 3 and Ho 2 O 3 is from 0 to 5 mol %.
Claim 2
Dependent Claim
130 words
A Faraday rotation single-mode fiber having a core and a cladding which are made of a glass having a composition comprising: ______________________________________
SiO.sub.2 26 to 38 mol %,
B.sub.2 O.sub.3 18 to 34 mol %,
Al.sub.2 O.sub.3 17 to 26 mol %,
Tb.sub.2 O.sub.3 18 to 32 mol %,
ZrO.sub.2 0 to 5 mol %,
Ce.sub.2 O.sub.3 0 to 5 mol %,
Pr.sub.2 O.sub.3 0 to 5 mol %,
Dy.sub.2 O.sub.3 0 to 5 mol %, and
Ho.sub.2 O.sub.3 0 to 5 mol %,
______________________________________ provided that the total amount of the above ingredients is less than 97mol % and the total amount of Ce 2 O 3 , Pr 2 O 3 , Dy 2 O 3 and Ho 2 O 3 is from 0 to 5 mol %.
Claim 3
Dependent Claim
58 words
The fiber as claimed in claim 1, wherein the amount of Tb 2 O 3 is from 18 to 28 mol % and the total amount of Tb 2 O 3 , Ce 2 O 3 , Pr 2 O 3 , Dy 2 O 3 , and Ho 2 O 3 is more than 20 mol %.
References Cited (Backward Citations)
US4341873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |