US3585393A
Expired / Lapsed
US
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Display of optical pulses by taking convolution of such pulses with a train of sampling pulses in a non-linear optical medium
Assignee: AT&T Inc
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Filing: 1968-08-26
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Granted: 1971-06-15
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Expires: 1988-08-26
Abstract
Abstract Picosecond optical pulses of periodicity T are displayed by generating the convolution of the optical pulses in a nonlinear optical medium (e.g., a KDP crystal) with a train of picosecond sampling pulses of periodicity nT+ delta T, where n is a simple fraction and delta T is a small fraction of T. The output of the nonlinear medium is detected and displayed on a conventional oscilloscope. The oscilloscope trace is a sampled display of the optical pulses with picosecond resolution and time scale magnification (T/ delta T+1).
Inventors
- 👤 Michael A Duguay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:49
CPC Classifications
G; G04; G04F; G04F13/00; G04F13/02; G04F13/026; G02; G02F; G02F1/00; G02F1/35
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
Apparatus having picosecond resolution for the time scale magnification of optical information pulses of periodicity T comprising a source of optical sampling pulses of duration of the order of one picosecond and of periodicity nT +T, where n is a simple fraction and T is a small fraction of T, and means including a nonlinear optical medium for generating the optical convolution signal of the information and sampling pulses, the convolution signal being magnified in time scale by a factor of about (T/T +1), and means for causing said information and sampling pulses to overlap within said medium.
Claim 2
Dependent Claim
98 words
Apparatus having picosecond resolution for the time scale magnification of optical information pulses of periodicity T comprising a source of optical sampling pulses of duration of the order of one picosecond and of periodicity nT +T, where n is a simple fraction and T is a small fraction of T, and means including a nonlinear optical medium for generating the optical convolution signal of the information and sampling pulses, the convolution signal being magnified in time scale by a factor of about (T/T +1), and means for causing said information and sampling pulses to overlap within said medium.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1 wherein said source comprises a continuous wave Nd:YAG laser.
Claim 4
Dependent Claim
16 words
The apparatus of claim 1 wherein said convolutional signal generating means comprises a nonlinear optic crystal.
Claim 5
Dependent Claim
60 words
The apparatus of claim 1 wherein said convolutional signal generating means comprises a two-photon fluorescent medium characterized by a pair of optically connected energy levels, the information pulses being of one optical frequency and the sampling pulses being of another optical frequency such that the sum of the frequencies corresponds to the energy separation between said pair of energy levels.
Claim 6
Dependent Claim
15 words
The apparatus of claim 1 wherein said convolution signal generating means comprises a saturable dye.
Claim 7
Dependent Claim
28 words
The apparatus of claim 1 in combination with means for converting the optical convolution signal to an electrical analog signal and means for visually displaying the electrical signal.
Claim 8
Independent Claim
85 words
The method of time scale magnifying optical information pulses of periodicity T Tcomprising the steps of generating optical sampling pulses of duration of the order of one picosecond and of periodicity nT+T, where n is a simple fraction and T is a small fraction of T, and said information and sampling pulses to overlap within a nonlinear optical medium which generates the optical convolution signal of the information and sampling pulses, the convolution signal being magnified in time scale by a factor of about (T/T1).
Claim 9
Independent Claim
85 words
The method of time scale magnifying optical information pulses of periodicity T Tcomprising the steps of generating optical sampling pulses of duration of the order of one picosecond and of periodicity nT+T, where n is a simple fraction and T is a small fraction of T, and said information and sampling pulses to overlap within a nonlinear optical medium which generates the optical convolution signal of the information and sampling pulses, the convolution signal being magnified in time scale by a factor of about (T/T1).
References Cited (Backward Citations)
US3248655A
Cited
US3229212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |