Patent US4871222A successfully refreshed from Google Patents.
US4871222A
Expired / Lapsed
US
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Reflex transmitter for a bidirectional light waveguide communication system
Assignee: Siemens AG
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Filing: 1988-08-01
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Granted: 1989-10-03
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Expires: 2008-08-01
Abstract
Abstract A bidirectional light waveguide communication system that has a light source preferably formed by a laser at one end of the light waveguide and a reflex transmitter at the other end of the waveguide with the reflex transmitter formed by a halved controllable optical directional coupler which has two strip waveguides that are terminated by a partially reflecting mirror and which has control electrodes which receive a transmission signal. An opto-electrical transducer receives the received light signal from both strip waveguides after the partially reflecting mirror.
Inventors
- 👤 Hartmut Burghardt
- 👤 Juergen Jahns
- 👤 Stefan Kindt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:23
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/25; H04B10/2587
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
123 words
A reflex transmitter for a bi-directional waveguide communications system having a light source of light sources preferably formed by a laser or lasers at only one end of said light waveguide, characterized in that said reflex transmitter comprises a substrate having a pair of strip waveguides mounted thereon and arranged in a form of one-half of a controllable optical directional coupler (HOR) that has its input/output (AI) connected to said light waveguide (LWL), said pair of strip waveguides (SLI, SLII) arranged in a form of one-half of a controllable optical directional coupler terminated with a partially reflecting mirror (S), and control electrodes (E,O) mounted adjacent said pair of strip waveguides and said control electrodes supplied with a signal which is to be transmitted.
Claim 2
Dependent Claim
123 words
A reflex transmitter for a bi-directional waveguide communications system having a light source of light sources preferably formed by a laser or lasers at only one end of said light waveguide, characterized in that said reflex transmitter comprises a substrate having a pair of strip waveguides mounted thereon and arranged in a form of one-half of a controllable optical directional coupler (HOR) that has its input/output (AI) connected to said light waveguide (LWL), said pair of strip waveguides (SLI, SLII) arranged in a form of one-half of a controllable optical directional coupler terminated with a partially reflecting mirror (S), and control electrodes (E,O) mounted adjacent said pair of strip waveguides and said control electrodes supplied with a signal which is to be transmitted.
Claim 3
Dependent Claim
33 words
A reflex transmitter according to claim 1, wherein an opto-electrical transducer (o/e) receives a light signal from said pair of two strip waveguides (SLI, SLII) is mounted adjacent the partially reflecting mirror (S).
Claim 4
Dependent Claim
25 words
A reflex transmitter according to claim 1 or 2, wherein another input/output (AII) of said directional coupler (HOR) is terminated with a light absorber (Z).
Claim 5
Dependent Claim
29 words
A reflex transmitter according to claim 1 or 2 wherein said control electrodes (E,O) receive said signal which is to be transmitted and said control electrodes are opposite polarized.
References Cited (Backward Citations)
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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) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |