CN104426612A - Method for automatically controlling power of optical transceiver - Google Patents
Method for automatically controlling power of optical transceiver Download PDFInfo
- Publication number
- CN104426612A CN104426612A CN201310397560.0A CN201310397560A CN104426612A CN 104426612 A CN104426612 A CN 104426612A CN 201310397560 A CN201310397560 A CN 201310397560A CN 104426612 A CN104426612 A CN 104426612A
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- China
- Prior art keywords
- laser diode
- electric current
- operational amplifier
- power
- photodiode
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Abstract
The invention discloses a method for automatically controlling the power of an optical transceiver. An adopted operational amplifier has the characteristics of broad bandwidth, high slew rate and abundant steady-state current, a driver separately designed in a photodiode is replaced, and the automatic control on optical power is realized.
Description
Technical field
The present invention relates to computer network transmission technology, specifically refer to that optical transmitter and receiver controls the method for power automatically.
Background technology
During the basic function of optical fiber communication optical sender, the signal of telecommunication of carry information is converted to light signal, and sends in optical fiber by light signal, light source is the Primary Component in optical fiber telecommunications system, and the development of Fibre Optical Communication Technology and the development of light source technology are undivided.Semiconductor laser is the perfect light source of High Speed Modulation, and the change of semiconductor laser to temperature is very sensitive, and the change of temperature and the aging of device bring unsteadiness to laser, thus power output is changed a lot.For ensureing normal, unobstructed communication, the luminous power of optical sender should remain on a constant value as far as possible.
Summary of the invention
The invention provides the method that optical transmitter and receiver controls power automatically, solve the problems such as laser luminous power stability is low, reach the object improving laser useful life.
Object of the present invention reaches by the following technical programs:
Optical transmitter and receiver controls the method for power automatically, it is characterized in that, comprises the following steps:
(A) luminous power of laser diode is set by operational amplifier, thus determine the electric current flowing through laser diode, a certain proportion of illumination is mapped on photodiode by laser diode simultaneously, photodiode will produce corresponding electric current, electric current returns operational amplifier, laser diode luminous power is in the power bracket of setting, and laser diode just thinks that laser and lasing fluorescence power are the power of setting;
(B) electric current flowing through laser diode increases, laser diode luminous power will increase, the luminous power being irradiated to photodiode will increase, thus the electric current feeding back to operational amplifier will increase, at this moment operational amplifier can think that the luminous power of laser diode is excessive, the electric current flowing through laser diode will be reduced, thus allow laser diode luminous power reduce, the luminous power being irradiated to photodiode also can reduce, the electric current feeding back to drive circuit also can reduce, until operational amplifier to the electric current of laser diode to set point;
(C) luminous power of laser diode declines, and the luminous power that photodiode receives also can reduce, and the electric current feeding back to operational amplifier can reduce, and operational amplifier will increase the electric current flowing through laser diode and reach set point.
Optical transmitter and receiver of the present invention controls the method for power automatically, comprise drive circuit, photodiode and laser diode, the adjustment end of described drive circuit is connected with laser diode, the feedback end of drive circuit is connected with photodiode, laser diode is connected with photodiode, also comprise the operational amplifier be connected with photodiode, described operational amplifier is connected with the feedback end of drive circuit.First the luminous power of laser diode is set by operational amplifier, thus determine the electric current flowing through laser diode, a certain proportion of illumination is mapped on photodiode by laser diode simultaneously, photodiode will produce corresponding electric current, electric current returns operational amplifier, laser diode luminous power is in the power bracket of setting, and laser diode just thinks that laser and lasing fluorescence power are the power of setting;
In described step (B), if the electric current flowing through laser diode increases, laser diode luminous power will increase, the luminous power being irradiated to photodiode will increase, thus the electric current feeding back to operational amplifier will increase, at this moment operational amplifier can think that the luminous power of laser diode is excessive, the electric current flowing through laser diode will be reduced, thus allow laser diode luminous power reduce, the luminous power being irradiated to photodiode also can reduce, the electric current feeding back to drive circuit also can reduce, until operational amplifier to the electric current of laser diode to set point,
In described step (C), if the luminous power of laser diode declines, the luminous power that photodiode receives also can reduce, and the electric current feeding back to operational amplifier can reduce, and operational amplifier will increase the electric current flowing through laser diode and reach set point.The operational amplifier adopted has the characteristic of wide bandwidth, high pressure Slew Rate and abundant steady-state current, instead of discrete designed driver in photodiode, realizes the automatic control to luminous power.
The present invention compared with prior art, there is following advantage and beneficial effect:
1, the operational amplifier that the present invention adopts has the characteristic of wide bandwidth, high pressure Slew Rate and abundant steady-state current, instead of discrete designed drive circuit and driver in photodiode, realizes the automatic control to luminous power.
2, operational amplifier of the present invention is built-in with charge pump, when using the operational amplifier of built-in charge pump, need not negative supply, and the flexibility that the driver that improve photodiode is connected with other circuit.
Accompanying drawing explanation
Fig. 1 is circuit block diagram of the present invention.
Embodiment
Embodiment 1
As shown in Figure 1, a kind of method clamping the clamping of round log timber of the present invention, realized by following steps: (A) comprises drive circuit, photodiode and laser diode, the adjustment end of described drive circuit is connected with laser diode, the feedback end of drive circuit is connected with photodiode, laser diode is connected with photodiode, also comprises the operational amplifier be connected with photodiode, and described operational amplifier is connected with the feedback end of drive circuit.First the luminous power of laser diode is set by operational amplifier, thus determine the electric current flowing through laser diode, a certain proportion of illumination is mapped on photodiode by laser diode simultaneously, photodiode will produce corresponding electric current, electric current returns operational amplifier, laser diode luminous power is in the power bracket of setting, and laser diode just thinks that laser and lasing fluorescence power are the power of setting; (B) electric current flowing through laser diode increases, laser diode luminous power will increase, the luminous power being irradiated to photodiode will increase, thus the electric current feeding back to operational amplifier will increase, at this moment operational amplifier can think that the luminous power of laser diode is excessive, the electric current flowing through laser diode will be reduced, thus allow laser diode luminous power reduce, the luminous power being irradiated to photodiode also can reduce, the electric current feeding back to drive circuit also can reduce, until operational amplifier to the electric current of laser diode to set point; (C) if the luminous power of laser diode declines, the luminous power that photodiode receives also can reduce, and the electric current feeding back to operational amplifier can reduce, and operational amplifier will increase the electric current flowing through laser diode and reach set point.The operational amplifier adopted has the characteristic of wide bandwidth, high pressure Slew Rate and abundant steady-state current, instead of discrete designed driver in photodiode, realizes the automatic control to luminous power.
Claims (4)
1. optical transmitter and receiver controls the method for power automatically, it is characterized in that, comprises the following steps:
(A) luminous power of laser diode is set by operational amplifier, thus determine the electric current flowing through laser diode, a certain proportion of illumination is mapped on photodiode by laser diode simultaneously, photodiode will produce corresponding electric current, electric current returns operational amplifier, laser diode luminous power is in the power bracket of setting, and laser diode just thinks that laser and lasing fluorescence power are the power of setting;
(B) electric current flowing through laser diode increases, laser diode luminous power will increase, the luminous power being irradiated to photodiode will increase, thus the electric current feeding back to operational amplifier will increase, at this moment operational amplifier can think that the luminous power of laser diode is excessive, the electric current flowing through laser diode will be reduced, thus allow laser diode luminous power reduce, the luminous power being irradiated to photodiode also can reduce, the electric current feeding back to drive circuit also can reduce, until operational amplifier to the electric current of laser diode to set point;
(C) luminous power of laser diode declines, and the luminous power that photodiode receives also can reduce, and the electric current feeding back to operational amplifier can reduce, and operational amplifier will increase the electric current flowing through laser diode and reach set point.
2. optical transmitter and receiver according to claim 1 controls the method for power automatically, it is characterized in that: described operational amplifier is built-in with charge pump.
3. optical transmitter and receiver according to claim 2 controls the method for power automatically, it is characterized in that: described photodiode is backlight monitor photo-diode.
4. optical transmitter and receiver according to claim 1 controls the method for power automatically, it is characterized in that: described operational amplifier is AD8037.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310397560.0A CN104426612A (en) | 2013-09-05 | 2013-09-05 | Method for automatically controlling power of optical transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310397560.0A CN104426612A (en) | 2013-09-05 | 2013-09-05 | Method for automatically controlling power of optical transceiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104426612A true CN104426612A (en) | 2015-03-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310397560.0A Pending CN104426612A (en) | 2013-09-05 | 2013-09-05 | Method for automatically controlling power of optical transceiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104426612A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508636A (en) * | 2017-07-17 | 2017-12-22 | 上海澳华光电内窥镜有限公司 | It is a kind of for the optical communication system of endoscopic system, endoscopic system and optical communication method |
-
2013
- 2013-09-05 CN CN201310397560.0A patent/CN104426612A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508636A (en) * | 2017-07-17 | 2017-12-22 | 上海澳华光电内窥镜有限公司 | It is a kind of for the optical communication system of endoscopic system, endoscopic system and optical communication method |
| CN107508636B (en) * | 2017-07-17 | 2022-07-29 | 上海澳华内镜股份有限公司 | Optical communication system for endoscope system, and optical communication method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150318 |
|
| WD01 | Invention patent application deemed withdrawn after publication |