Patent US4156809A successfully refreshed from Google Patents.
US4156809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data acquisition system
Assignee: United States Department of Energy
•
Filing: 1978-02-07
•
Granted: 1979-05-29
•
Expires: 1998-02-07
Abstract
Abstract A data acquisition system capable of resolving transient pulses in the subnanosecond range. A pulse in an information carrying medium such as light is transmitted through means which disperse the pulse, such as a fiber optic light guide which time-stretches optical pulses by chromatic dispersion. This time-stretched pulse is used as a sampling pulse and is modulated by the signal to be recorded. The modulated pulse may be further time-stretched prior to being recorded. The recorded modulated pulse is unfolded to derive the transient signal by utilizing the relationship of the time-stretching that occurred in the original pulse.
Inventors
- 👤 David T. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:24
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/32; G01R13/325; H; H04; H04B; H04B10/00; H04B10/50; H04B10/508; H04B10/58; H04B10/588
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
55 words
In a data acquisition system, the apparatus comprising: a. Means for generating an information carrying medium, b. Means for dispersing said medium in time according to some physical parameter of the medium, c. Modulator means for modulating said dispersed medium by the data to be acquired, and d. Means for recording said dispersed, modulated medium.
Claim 2
Dependent Claim
55 words
In a data acquisition system, the apparatus comprising: a. Means for generating an information carrying medium, b. Means for dispersing said medium in time according to some physical parameter of the medium, c. Modulator means for modulating said dispersed medium by the data to be acquired, and d. Means for recording said dispersed, modulated medium.
Claim 3
Dependent Claim
20 words
The apparatus according to claim 1 including means for further dispersing said dispersed, modulated information carrying medium prior to recording.
Claim 4
Dependent Claim
18 words
The apparatus according to claim 1 wherein the information carrying medium generated by said means is a wave.
Claim 5
Dependent Claim
13 words
The apparatus according to claim 3 wherein said wave is an electromagnetic wave.
Claim 6
Dependent Claim
14 words
The apparatus according to claim 4 wherein said electromagnetic wave is of optical wavelengths.
Claim 7
Dependent Claim
21 words
The apparatus according to claim 5 wherein said means for dispersing said optical wave is a length of fiber optic waveguide.
Claim 8
Dependent Claim
15 words
The apparatus according to claim 6 including means for further dispersing said modulated optical wave.
Claim 9
Dependent Claim
24 words
The apparatus according to claim 7 wherein said means for further dispersing said modulated optical wave is a second length of fiber optic waveguide.
Claim 10
Dependent Claim
19 words
The apparatus according to claim 7 wherein said means for further dispersing said modulated optical wave is a grating.
Claim 11
Dependent Claim
19 words
The apparatus according to claim 7 wherein said means for further dispersing said modulated optical waveguide is a prism.
Claim 12
Dependent Claim
16 words
The apparatus according to claim 8 wherein said recording means include a photomultiplier and an oscillosocpe.
Claim 13
Dependent Claim
15 words
The apparatus according to claim 9 wherein said recording means include an optical integrating device.
Claim 14
Dependent Claim
15 words
The apparatus according to claim 10 wherein said recording means include an optical integrating device.
Claim 15
Dependent Claim
14 words
The apparatus according to claim 6 wherein said modulating means is an electro-optical modulator.
Claim 16
Dependent Claim
13 words
The apparatus according to claim 14 wherein said modulator is a Kerr cell.
Claim 17
Dependent Claim
45 words
In a data acquisition system, the method comprising: a. Generating an information carrying medium, b. Dispersing said medium in time according to some physical parameter of the medium, c. Modulating said dispersed medium by data to be acquired, and d. Recording said dispersed, modulated medium.
Claim 18
Dependent Claim
45 words
In a data acquisition system, the method comprising: a. Generating an information carrying medium, b. Dispersing said medium in time according to some physical parameter of the medium, c. Modulating said dispersed medium by data to be acquired, and d. Recording said dispersed, modulated medium.
Claim 19
Dependent Claim
20 words
The method of claim 16 including the step of further dispersing said dispersed, modulated information carrying medium prior to recording.
Claim 20
Dependent Claim
13 words
The method of claim 16 wherein said information carrying medium is a wave.
Claim 21
Dependent Claim
12 words
The method of claim 18 wherein said wave is an electromagnetic wave.
Claim 22
Dependent Claim
21 words
The method of claim 19 wherein said electromagnetic wave is of optical wavelengths and said dispersing step is by chromatic dispersion.
Claim 23
Dependent Claim
28 words
The method of claim 16 wherein said information carrying medium is an optical pulse including at least two wavelengths and said dispersing steps are accomplished by chromatic dispersion.
Claim 24
Dependent Claim
76 words
The method of claim 21 wherein said two dispersing steps are accomplished by lengths L 1 and L 2 , respectively, of fiber optic waveguides and including the step of unfolding the data to be acquired utilizing the relationship ##EQU6## where Δt m is the time interval between selected wavelengths as the optical pulse enters the second waveguide at Δt r is the time interval between said wavelengths as the optical pulse leaves the second waveguide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-28 | 1982-11-27 | 1983-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-28 | 1986-11-27 | 1987-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-28 | 1990-11-27 | 1991-05-29 | $7700.00 | Window Closed / Lapsed |