US4989201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical communication system with a stabilized "comb" of frequencies
Assignee: Nokia Bell Labs
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Filing: 1989-12-21
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Granted: 1991-01-29
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Expires: 2009-12-21
Abstract
Abstract An optical communication system in which a group, or "comb", of intelligence-bearing signals are frequency-division-multiplexed and stabilized using a corresponding "comb" of resonances associated with a Fabry-Perot cavity.
Inventors
- 👤 Bernard Glance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:22
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/50; H01; H01S; H01S3/00; H01S3/10; H01S3/13; H01S3/1303; H04B10/501; H04B10/506; H04B10/572
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
An optical communication system to process at least three intelligence-bearing, frequency-multiplexed, modulated optical signals comprising: means for frequency multiplexing the at least three signals, at least one Fabry-Perot cavity with resonances at the frequencies of the at least three signals and with which cavity the signals interact, means for applying a dithering frequency to at least one of the at least three signals to yield at least one dithered signal, a feedback loop associated with the at least one dithered signal to generate an error signal proportional to drifting of at least one detected parameter of the at least one dithered signal, and means for adjusting a device in response to the error signal.
Claim 2
Dependent Claim
114 words
An optical communication system to process at least three intelligence-bearing, frequency-multiplexed, modulated optical signals comprising: means for frequency multiplexing the at least three signals, at least one Fabry-Perot cavity with resonances at the frequencies of the at least three signals and with which cavity the signals interact, means for applying a dithering frequency to at least one of the at least three signals to yield at least one dithered signal, a feedback loop associated with the at least one dithered signal to generate an error signal proportional to drifting of at least one detected parameter of the at least one dithered signal, and means for adjusting a device in response to the error signal.
Claim 3
Dependent Claim
39 words
The communications system of claim 1 comprising at least two Fabry-Perot cavities, and in which system one of the signals is a reference signal, and the said feedback loop is connected to detect drift in the detected reference signal.
Claim 4
Dependent Claim
34 words
The communications system of claim 2 in which there is a feedback loop associated with each of the Fabry-Perot cavities to detect drift in the detected reference signal at each of the Fabry-Perot cavities.
Claim 5
Dependent Claim
20 words
The communications system of claim 3 in which the signals are transmitted through at least one of the Fabry-Perot cavities.
Claim 6
Dependent Claim
20 words
The communications system of claim 3 in which the signals are reflected of at least one of the Fabry-Perot cavities.
Claim 7
Dependent Claim
20 words
The communications system of claim 1 in which there exist cavity resonances at the frequencies of each of the signals.
References Cited (Backward Citations)
US4707061A
Cited
US4861136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-28 | 2002-07-30 | 2003-01-29 | $7700.00 | Window Closed / Lapsed |