US4871222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 06:56
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)
DE2708606A1
Cited
US4291939A
Cited
US4195269A
Cited
US4492425A
Cited
US4436365A
Cited
US4667331A
Cited
US4712859A
Cited
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 |