JPS57162541A - Optical pulse receiver - Google Patents
Optical pulse receiverInfo
- Publication number
- JPS57162541A JPS57162541A JP56046261A JP4626181A JPS57162541A JP S57162541 A JPS57162541 A JP S57162541A JP 56046261 A JP56046261 A JP 56046261A JP 4626181 A JP4626181 A JP 4626181A JP S57162541 A JPS57162541 A JP S57162541A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- output
- circuit
- amplifier
- gate circuit
- 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.)
- Granted
Links
Classifications
-
- 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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/697—Arrangements for reducing noise and distortion
-
- 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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/691—Arrangements for optimizing the photodetector in the receiver
- H04B10/6911—Photodiode bias control, e.g. for compensating temperature variations
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
PURPOSE:To prevent generation of shot noise for an optical pulse receiver, by closing a gate circuit in case the optical input pulse is interrupted or drops abnormally. CONSTITUTION:The pulse supplied to a receiver via an optical transmission line is converted into an electric signal through an APD1 and then amplified by an amplifier 2 to be applied to a gate circuit 8 through a discriminating/reproducing circuit 7. A part of the output of the amplifier 2 receives a detection of its peak value through a peak detector 3 and is applied to an APD via a converter 4 to perform an AGC. At the same time, another part of the output of the amplifier 2 is applied to a level detector 6 through a band pass filter 5 that transmits the frequency component of a carrier pulse. When the output of the filter 5 is higher than a certain level, the circuit 8 is opened to make the output of the circuit 7 pass through a demodulator 9. The gate circuit 8 is closed in case the pulse is interrupted or drops abnormally. Thus the occurrence of the shot noise can be prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56046261A JPS57162541A (en) | 1981-03-31 | 1981-03-31 | Optical pulse receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56046261A JPS57162541A (en) | 1981-03-31 | 1981-03-31 | Optical pulse receiver |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57162541A true JPS57162541A (en) | 1982-10-06 |
JPS623623B2 JPS623623B2 (en) | 1987-01-26 |
Family
ID=12742257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56046261A Granted JPS57162541A (en) | 1981-03-31 | 1981-03-31 | Optical pulse receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57162541A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008153439A1 (en) * | 2007-06-15 | 2008-12-18 | Molotkov Sergei Nikolaevich | Device for recording weak optical pulses |
US10203266B2 (en) | 2013-12-12 | 2019-02-12 | Kokusai Keisokuki Kabushiki Kaisha | Bearing testing machine |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07153099A (en) * | 1993-11-26 | 1995-06-16 | Nec Corp | Apparatus for driving objective lens |
-
1981
- 1981-03-31 JP JP56046261A patent/JPS57162541A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008153439A1 (en) * | 2007-06-15 | 2008-12-18 | Molotkov Sergei Nikolaevich | Device for recording weak optical pulses |
US10203266B2 (en) | 2013-12-12 | 2019-02-12 | Kokusai Keisokuki Kabushiki Kaisha | Bearing testing machine |
Also Published As
Publication number | Publication date |
---|---|
JPS623623B2 (en) | 1987-01-26 |
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