Patent US5420948A successfully refreshed from Google Patents.
US5420948A
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Chirped optical fibre filter
Assignee: Nortel Networks Ltd
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Filing: 1994-08-12
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Granted: 1995-05-30
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Expires: 2014-08-12
Abstract
Abstract A chirped distributed Bragg grating optical fibre filter comprises an adiabatically tapered single mode optical fibre provided on the taper with a distributed Bragg grating of uniform pitch.
Inventors
- 👤 Kevin C. Byron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:38
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/255; G02B6/2552; G02B6/02; G02B6/02057; G02B6/02076; G02B6/0208; G02B6/021; G02B6/02052
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A chirped distributed Bragg grating optical fibre filter comprising an adiabatically tapered single mode optical fibre provided on the taper with a distributed Bragg grating of uniform pitch.
Claim 2
Dependent Claim
28 words
A chirped distributed Bragg grating optical fibre filter comprising an adiabatically tapered single mode optical fibre provided on the taper with a distributed Bragg grating of uniform pitch.
References Cited (Backward Citations)
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US4285569A
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GB2161612A
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US4665660A
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US4874216A
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US5033812A
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US5033812B1
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US5058979A
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US5208882A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-29 | 1998-11-28 | 1999-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-29 | 2002-11-28 | 2003-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-29 | 2006-11-28 | 2007-05-30 | $7700.00 | Window Closed / Lapsed |