JPH0266048U - - Google Patents
Info
- Publication number
- JPH0266048U JPH0266048U JP14435588U JP14435588U JPH0266048U JP H0266048 U JPH0266048 U JP H0266048U JP 14435588 U JP14435588 U JP 14435588U JP 14435588 U JP14435588 U JP 14435588U JP H0266048 U JPH0266048 U JP H0266048U
- Authority
- JP
- Japan
- Prior art keywords
- optical
- optical transmitter
- attenuator
- signal
- light emitting
- 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
- 230000003287 optical effect Effects 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Optical Communication System (AREA)
Description
第１図は本考案による光送信器の一実施例を示
すブロツク図、第２図は電圧制御形光可変減衰器
の動作を説明するための特性図、第３図は光出力
波形を示す図である。
１……駆動回路、２……発光素子、３……変調
度設定回路、４……電圧制御形光可変減衰器、５
……直流バイアス設定回路。
Fig. 1 is a block diagram showing an embodiment of the optical transmitter according to the present invention, Fig. 2 is a characteristic diagram for explaining the operation of the voltage-controlled optical variable attenuator, and Fig. 3 is a diagram showing the optical output waveform. It is. DESCRIPTION OF SYMBOLS 1... Drive circuit, 2... Light emitting element, 3... Modulation degree setting circuit, 4... Voltage controlled optical variable attenuator, 5
...DC bias setting circuit.
Claims (1)
器において、主デジタル信号によつて強度変調さ
れる発光素子と、光減衰量可変の電圧制御形光可
変減衰器とが光学的に結合され、該光減衰器に与
えられる直流バイアス電圧に副信号がアナログ重
畳されていることを特徴とする光送信器。 In an optical transmitter used in a digital optical communication system, a light emitting element whose intensity is modulated by a main digital signal and a voltage-controlled variable optical attenuator with variable optical attenuation are optically coupled, and the optical attenuator An optical transmitter characterized in that an analog sub-signal is superimposed on a DC bias voltage applied to an optical transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14435588U JPH0266048U (en) | 1988-11-07 | 1988-11-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14435588U JPH0266048U (en) | 1988-11-07 | 1988-11-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0266048U true JPH0266048U (en) | 1990-05-18 |
Family
ID=31411992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14435588U Pending JPH0266048U (en) | 1988-11-07 | 1988-11-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0266048U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006319709A (en) * | 2005-05-13 | 2006-11-24 | Fujitsu Ltd | Sub-signal modulation device, sub-signal demodulation device, and sub-signal modulation-demodulation system |
-
1988
- 1988-11-07 JP JP14435588U patent/JPH0266048U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006319709A (en) * | 2005-05-13 | 2006-11-24 | Fujitsu Ltd | Sub-signal modulation device, sub-signal demodulation device, and sub-signal modulation-demodulation system |
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