US4405199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for enhancing signals transmitted over optical fibers
Assignee: United States Department of Energy
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Filing: 1981-02-11
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Granted: 1983-09-20
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Expires: 2001-02-11
Abstract
Abstract A method for spectral equalization of high frequency spectrally broadband signals transmitted through an optical fiber. The broadband signal input is first dispersed by a grating. Narrow spectral components are collected into an array of equalizing fibers. The fibers serve as optical delay lines compensating for material dispersion of each spectral component during transmission. The relative lengths of the individual equalizing fibers are selected to compensate for such prior dispersion. The output of the equalizing fibers couple the spectrally equalized light onto a suitable detector for subsequent electronic processing of the enhanced broadband signal.
Inventors
- 👤 James W. Ogle
- 👤 Peter B. Lyons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:15
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/28; G02B6/2804; G02B6/2861; G02B6/293; G02B6/29379; G02B6/29392; G02B6/29394; G02B6/42; G02B6/4201; G02B6/4204; G02B6/4215; G02B6/29304; G02B6/29305; G02B6/2931
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
A method of enhancing a short, spectrally broadband signal transmitted through an optical fiber having substantial length, said method comprising the following steps: inserting the signal into a spectrograph; collecting a plurality of spectral components of the signal by directing the output of the spectrograph into an array of equalizing fibers whose individual fibers have relative lengths selected to compensate for prior material dispersion of the respective spectral components of the signal during transmission; and illuminating a photodetector by the resulting output signals from the array of fibers.
Claim 2
Independent Claim
88 words
A method of enhancing a short, spectrally broadband signal transmitted through an optical fiber having substantial length, said method comprising the following steps: inserting the signal into a spectrograph; collecting a plurality of spectral components of the signal by directing the output of the spectrograph into an array of equalizing fibers whose individual fibers have relative lengths selected to compensate for prior material dispersion of the respective spectral components of the signal during transmission; and illuminating a photodetector by the resulting output signals from the array of fibers.
Claim 3
Independent Claim
79 words
A method of enhancing an incoming optical fiber signal by the following steps: dispersing a received broadband signal into a plurality of narrow spectral components; directing each narrow spectral component to a first end of an individual equalizing fiber within an array in which the length of individual equalizing fibers is selected to compensate for prior dispersion of the spectral component directed thereto; and illuminating a detector by the resulting signals at the remaining ends of the equalizing fibers.
Claim 4
Independent Claim
79 words
A method of enhancing an incoming optical fiber signal by the following steps: dispersing a received broadband signal into a plurality of narrow spectral components; directing each narrow spectral component to a first end of an individual equalizing fiber within an array in which the length of individual equalizing fibers is selected to compensate for prior dispersion of the spectral component directed thereto; and illuminating a detector by the resulting signals at the remaining ends of the equalizing fibers.
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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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |