JPS55137740A - Light analogue signal modulation system - Google Patents
Light analogue signal modulation systemInfo
- Publication number
- JPS55137740A JPS55137740A JP4548279A JP4548279A JPS55137740A JP S55137740 A JPS55137740 A JP S55137740A JP 4548279 A JP4548279 A JP 4548279A JP 4548279 A JP4548279 A JP 4548279A JP S55137740 A JPS55137740 A JP S55137740A
- Authority
- JP
- Japan
- Prior art keywords
- low
- frequency components
- modulation system
- signal modulation
- analogue signal
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Semiconductor Lasers (AREA)
Abstract
PURPOSE:To reduce nonlinear distortion of a light signal by suppressing low- frequency components in the transmission side and by expanding suppressed low- frequency components in the receiving side. CONSTITUTION:An input signal is supplied to preemphasis circuit 6 of the transmission side and has low-frequency components suppressed to reduce the generation quantity of nonlinear distortion of semiconductor laser diode 2, and low-frequency components are expanded by deemphasis circuit 10 of the receiving side to make the frequency characteristic flat.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4548279A JPS55137740A (en) | 1979-04-16 | 1979-04-16 | Light analogue signal modulation system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4548279A JPS55137740A (en) | 1979-04-16 | 1979-04-16 | Light analogue signal modulation system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55137740A true JPS55137740A (en) | 1980-10-27 |
Family
ID=12720611
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4548279A Pending JPS55137740A (en) | 1979-04-16 | 1979-04-16 | Light analogue signal modulation system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55137740A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014075492A (en) * | 2012-10-04 | 2014-04-24 | Sony Corp | Correction circuit, drive circuit, light-emitting device, and correction method of current pulse waveform |
JP2014103519A (en) * | 2012-11-19 | 2014-06-05 | Fujitsu Ltd | Emphasis signal generation circuit |
-
1979
- 1979-04-16 JP JP4548279A patent/JPS55137740A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014075492A (en) * | 2012-10-04 | 2014-04-24 | Sony Corp | Correction circuit, drive circuit, light-emitting device, and correction method of current pulse waveform |
JP2014103519A (en) * | 2012-11-19 | 2014-06-05 | Fujitsu Ltd | Emphasis signal generation circuit |
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