CA1098977A - Apparatus for transmitting multilevel signals on optical fibres - Google Patents
Apparatus for transmitting multilevel signals on optical fibresInfo
- Publication number
- CA1098977A CA1098977A CA310,215A CA310215A CA1098977A CA 1098977 A CA1098977 A CA 1098977A CA 310215 A CA310215 A CA 310215A CA 1098977 A CA1098977 A CA 1098977A
- Authority
- CA
- Canada
- Prior art keywords
- output
- sources
- light
- signal
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/504—Laser transmitters using direct modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/54—Intensity modulation
- H04B10/541—Digital intensity or amplitude modulation
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
- Dc Digital Transmission (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT68972-A/77 | 1977-09-05 | ||
IT68972/77A IT1117071B (it) | 1977-09-05 | 1977-09-05 | Dispositivo per trasmettere segnali multilivello su fibra ottica |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1098977A true CA1098977A (en) | 1981-04-07 |
Family
ID=11311048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA310,215A Expired CA1098977A (en) | 1977-09-05 | 1978-08-29 | Apparatus for transmitting multilevel signals on optical fibres |
Country Status (8)
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4307469A (en) * | 1980-04-18 | 1981-12-22 | Harris Corporation | Injection laser diode digital transmitter having signal quality monitoring arrangement |
JPS5737941A (en) * | 1980-08-13 | 1982-03-02 | Fujitsu Ltd | Optical output circuit |
US4370745A (en) * | 1980-11-14 | 1983-01-25 | Bell Telephone Laboratories, Incorporated | Fail-safe transmission system |
DE3127379C2 (de) * | 1981-07-10 | 1987-02-12 | Siemens AG, 1000 Berlin und 8000 München | Anordnung zur Erfassung und Übertragung von Sensordaten |
FR2526554B1 (fr) * | 1982-05-06 | 1985-06-07 | Telecommunications Sa | Procede de regulation de moyens emetteurs d'informations lumineuses et le systeme de mise en oeuvre |
US4523099A (en) * | 1983-04-29 | 1985-06-11 | Lavine Michael K | Device for transmitting analog sensor data via fiber optics |
DE3317027C2 (de) * | 1983-05-10 | 1985-03-21 | Hewlett-Packard Gmbh, 7030 Boeblingen | Schaltungsanordnung zur Umwandlung eines elektrischen Einganssignales in ein optisches Ausgangssignal |
JPH01223837A (ja) * | 1988-03-03 | 1989-09-06 | Nec Corp | 光多値送信機 |
US4991229A (en) * | 1989-04-03 | 1991-02-05 | Honeywell Inc. | Optical transmitter power measurement and control |
JPH0339576U (US20020051482A1-20020502-M00012.png) * | 1989-08-28 | 1991-04-16 | ||
JPH04132428A (ja) * | 1990-09-25 | 1992-05-06 | Canon Inc | 光通信方式及びそこに用いられる受信装置 |
US5280500A (en) * | 1991-10-10 | 1994-01-18 | Crescendo Communications, Inc. | Method and apparatus for multilevel encoding for a local area network |
US5423220A (en) * | 1993-01-29 | 1995-06-13 | Parallel Design | Ultrasonic transducer array and manufacturing method thereof |
US5335239A (en) * | 1993-03-17 | 1994-08-02 | Eastman Kodak Company | Thermal compensation for laser diodes using active feedback |
US5753903A (en) * | 1996-11-05 | 1998-05-19 | Medar, Inc. | Method and system for controlling light intensity in a machine vision system |
GB2366677B (en) * | 2000-09-09 | 2004-05-19 | Ibm | Optical amplitude modulator |
JPWO2002033921A1 (ja) | 2000-10-13 | 2004-03-04 | 三菱電機株式会社 | 光伝送装置及び光伝送方法 |
JP4744720B2 (ja) * | 2001-05-08 | 2011-08-10 | 三菱電機株式会社 | 多値変調装置 |
US20030235415A1 (en) * | 2002-06-21 | 2003-12-25 | Peters Frank H. | Optical communication devices and optical communication methods |
JP2008067239A (ja) * | 2006-09-08 | 2008-03-21 | Nippon Telegr & Teleph Corp <Ntt> | 光伝送方法、光伝送システム、および光送信器 |
JP4849632B2 (ja) * | 2007-06-18 | 2012-01-11 | 日本電信電話株式会社 | 光伝送方法、符号化方法、光伝送システムおよび光送信装置 |
DE102007043255B4 (de) * | 2007-09-11 | 2016-09-22 | Siemens Aktiengesellschaft | Verfahren und Anordnung zur Aussendung von Daten |
JP4925334B2 (ja) * | 2007-11-13 | 2012-04-25 | 日本電信電話株式会社 | 光伝送方式 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1238658A (US20020051482A1-20020502-M00012.png) * | 1967-06-13 | 1971-07-07 | ||
US3573766A (en) * | 1969-02-17 | 1971-04-06 | Radiation Inc | Apparatus and process for recording binary data in compact form |
IL38104A (en) * | 1971-02-24 | 1974-01-14 | Hughes Aircraft Co | Adaptive power redistribution systems |
DE2218431C3 (de) * | 1972-04-17 | 1986-10-23 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur Kompensation des nichtlinearen Zusammenhanges zwischen angelegter Spannung und Lichtausstrahlung bei Lumineszenzdioden |
US3851167A (en) * | 1972-12-11 | 1974-11-26 | Itt | Light-guide communication system with image intensifier repeater elements |
US3809908A (en) * | 1973-06-29 | 1974-05-07 | Itt | Electro-optical transmission line |
-
1977
- 1977-09-05 IT IT68972/77A patent/IT1117071B/it active
-
1978
- 1978-08-24 FR FR7824536A patent/FR2402257A1/fr active Granted
- 1978-08-29 JP JP10450178A patent/JPS5448102A/ja active Granted
- 1978-08-29 CA CA310,215A patent/CA1098977A/en not_active Expired
- 1978-08-29 US US05/937,816 patent/US4211929A/en not_active Expired - Lifetime
- 1978-08-30 GB GB7835043A patent/GB2003600B/en not_active Expired
- 1978-09-01 DE DE2838299A patent/DE2838299C3/de not_active Expired
- 1978-09-01 NL NL7808990A patent/NL7808990A/xx not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
GB2003600B (en) | 1982-01-27 |
DE2838299C3 (de) | 1981-09-03 |
JPS5750376B2 (US20020051482A1-20020502-M00012.png) | 1982-10-27 |
GB2003600A (en) | 1979-03-14 |
DE2838299A1 (de) | 1979-03-08 |
NL7808990A (nl) | 1979-03-07 |
FR2402257A1 (fr) | 1979-03-30 |
DE2838299B2 (de) | 1980-09-11 |
FR2402257B1 (US20020051482A1-20020502-M00012.png) | 1982-07-02 |
JPS5448102A (en) | 1979-04-16 |
IT1117071B (it) | 1986-02-10 |
US4211929A (en) | 1980-07-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKEX | Expiry |