Patent US5375004A successfully refreshed from Google Patents.
US5375004A
Expired / Lapsed
US
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Light connecting device and method of driving the same
Assignee: NEC Corp
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Filing: 1992-03-09
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Granted: 1994-12-20
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Expires: 2012-03-09
Abstract
Abstract A light connecting device for routing information uses only light signals. The light connecting device includes photoelectric input/output elements having a light threshold and a light memory, a polarized beam splitter, and light delay circuits having different light delays. The light input signal includes a timing signal and an information signal sequentially input into the beam splitter. The timing light signal is separated from the other signals using the beam splitter and then input into the respective photoelectric input/output elements through the light delay circuits. If the address light signal is incident in synchronization with that of the timing light signal, only the element on which the address and timing lights are simultaneously incident is turned ON and acts as a light amplifier by injecting current to amplify the information signals. Thus, the light connecting device of the invention realizes a self-routing operation using only light signals having the address of information specified by light signals.
Inventors
- 👤 Ichiro Ogura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:01
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/0001; H04Q11/0003
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
A light connecting device comprising: a light input circuit having an input serially receiving first and second light signals, the light input circuit optically combining the first and second light signals; and a light routing device, coupled to the light input circuit, having a plurality of photoelectric input/output elements for light generation upon simultaneously receiving the first and second light signals from the light input circuit, wherein the first light signal has a first polarization and the second light signal has a second polarization different from the first polarization, and wherein the light input circuit includes a polarization beam splitter for outputting the first light signal having the first polarization on a first output and outputting the second light signal having the second polarization on a second output and including means for combining the first light signal from the first output and the second light signal from the second output.
Claim 2
Dependent Claim
150 words
A light connecting device comprising: a light input circuit having an input serially receiving first and second light signals, the light input circuit optically combining the first and second light signals; and a light routing device, coupled to the light input circuit, having a plurality of photoelectric input/output elements for light generation upon simultaneously receiving the first and second light signals from the light input circuit, wherein the first light signal has a first polarization and the second light signal has a second polarization different from the first polarization, and wherein the light input circuit includes a polarization beam splitter for outputting the first light signal having the first polarization on a first output and outputting the second light signal having the second polarization on a second output and including means for combining the first light signal from the first output and the second light signal from the second output.
Claim 3
Dependent Claim
76 words
The light connecting device as claimed in claim 1 wherein the light input circuit includes a plurality of delay circuits respectively coupled between the first output of the polarization beam splitter and the plurality of photoelectric input/output elements, wherein each of the plurality of delay circuits delays the first signal by a different amount for causing the first light signal to be received at each of the plurality of photoelectric input/output elements at a different time.
Claim 4
Dependent Claim
27 words
The light connecting device of claim 1 wherein the first light signal is a timing light signal and the second light signal is an address light signal.
Claim 5
Independent Claim
101 words
A method for selectively routing light comprising: polarizing a first light signal with a first polarization; polarizing second light signals with a second polarization different from the first polarization; transmitting the first light signal and the second light signals serially through a first optical medium; receiving the light transmitted through the first optical medium and separating the first light signal and the second light signals using a polarized beam splitter; and routing each of the second light signals respectively into a plurality of optical outputs by selectively combining the first light signal with at least one of the second light signals.
Claim 6
Independent Claim
101 words
A method for selectively routing light comprising: polarizing a first light signal with a first polarization; polarizing second light signals with a second polarization different from the first polarization; transmitting the first light signal and the second light signals serially through a first optical medium; receiving the light transmitted through the first optical medium and separating the first light signal and the second light signals using a polarized beam splitter; and routing each of the second light signals respectively into a plurality of optical outputs by selectively combining the first light signal with at least one of the second light signals.
Claim 7
Dependent Claim
37 words
The method for selectively routing light as claimed in claim 4 wherein the step of routing each of the second light signals includes the step of delaying the first light signal relative to the second light signals.
Claim 8
Dependent Claim
34 words
The method for selectively routing light as claimed in claim 4 wherein the second light signals include a plurality of information light signals and wherein the first light signal is a timing light signal.
References Cited (Backward Citations)
US5072439A
Cited
US5153758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-19 | 1998-06-20 | 1998-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-19 | 2002-06-20 | 2002-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-19 | 2006-06-20 | 2006-12-20 | $7700.00 | Window Closed / Lapsed |