CN106817166A - A kind of power autocontrol method of optical transmitter and receiver - Google Patents
A kind of power autocontrol method of optical transmitter and receiver Download PDFInfo
- Publication number
- CN106817166A CN106817166A CN201510848964.6A CN201510848964A CN106817166A CN 106817166 A CN106817166 A CN 106817166A CN 201510848964 A CN201510848964 A CN 201510848964A CN 106817166 A CN106817166 A CN 106817166A
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- China
- Prior art keywords
- drive circuit
- optical
- power
- light
- photodiode
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- 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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25751—Optical arrangements for CATV or video distribution
-
- 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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Multimedia (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of power autocontrol method of optical transmitter and receiver, after the multiplexed equipment of multiple signals that front-end camera is transmitted first is mixed into signal all the way, it is sent to the input interface of optical sender, by after enhanced processing, carry out automatically controlled decay, it is transformed to carry out electrical/optical modulation by light source and drive circuit again after being suitable to the pattern of circuit transmission, converts electrical signals to optical signal；Output interface is connected with light every device, can greatly reduce the influence to drive circuit by Optical Fiber Transmission clock pulse light back wave.
Description
Technical field
The present invention relates to computer network transmission technology, a kind of power autocontrol method of optical transmitter and receiver is specifically referred to.
Background technology
Optical transmitter and receiver is an optical fiber communication equipment for extension data transfer, and it is mainly and passes throughSignal modulation, the technology such as photoelectric conversion, the purpose of remote transmission is reached using light-transfer characteristic.Optical transmitter and receiver is generally employed in pairs, and is divided into optical sender and photoreceiver, and optical sender completes electrical/optical conversion, and optical signal launch is gone out for Optical Fiber Transmission;Photoreceiver is mainly that the optical signal received from optical fiber is restored is electric signal, completeCheng GuangThe conversion of/electricity.Optical transmitter and receiver effect is exactly for remote transmission data.
The electric signal of the information of carrying is converted into optical signal during the basic function of fiber optic communication optical sender, and by optical signal feeding optical fiber, light source is the Primary Component in optical fiber telecommunications system, and the development of Fibre Optical Communication Technology is undivided with the development of light source technology.Semiconductor laser is the perfect light source of High Speed Modulation, and change of the semiconductor laser to temperature is very sensitive, and the change of temperature and the aging of device bring unstability to laser, so that power output changes a lot.To ensure normal, unobstructed communication, the luminous power of optical sender should be maintained at a constant value as far as possible.
The content of the invention
The present invention provides a kind of power autocontrol method of optical transmitter and receiver to solve the low problem of light source luminescent power stability, reaches the purpose for improving laser service life.
The purpose of the present invention reaches by the following technical programs：
After the present invention multiplexed equipment of multiple signals that front-end camera is transmitted first is mixed into signal all the way, it is sent to the input interface of optical sender, by after enhanced processing, carry out automatically controlled decay, it is transformed to carry out electrical/optical modulation by light source and drive circuit again after being suitable to the pattern of circuit transmission, converts electrical signals to optical signal；Output interface is connected with light every device, can greatly reduce the influence to drive circuit by Optical Fiber Transmission clock pulse light back wave.
The optical sender includes input interface, output interface, light source, drive circuit and light every device, light source, drive circuit and light are sequentially connected every device, the input interface is connected with drive circuit, light is connected every device with output interface, also include automatically controlling power circuit, the power circuit that automatically controls is connected with drive circuit.
The power circuit that automatically controls includes drive circuit, photodiode and laser diode, the adjustment end of the drive circuit is connected with laser diode, the feedback end of drive circuit is connected with photodiode, laser diode is connected with photodiode, also include the operational amplifier being connected with photodiode, the operational amplifier is connected with the feedback end of drive circuit.
The operational amplifier is built-in with charge pump.
The photodiode is backlight monitor photo-diode.
The present invention compared with prior art, has the following advantages that and beneficial effect：
1st, output interface of the invention is connected with light every device, can greatly reduce the influence to drive circuit by Optical Fiber Transmission clock pulse light back wave.
2nd, operational amplifier of the invention is built-in with charge pump, when the operational amplifier using built-in charge pump, without negative supply, improves the flexibility that the driver of photodiode is connected with other circuits.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes the part of the application, does not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is the structured flowchart of optical sender.
Specific embodiment
Embodiment 1
As shown in Figure 1, after the present invention multiplexed equipment of multiple signals that front-end camera is transmitted first is mixed into signal all the way, it is sent to the input interface of optical sender, by after enhanced processing, carry out automatically controlled decay, it is transformed to carry out electrical/optical modulation by light source and drive circuit again after being suitable to the pattern of circuit transmission, converts electrical signals to optical signal；Output interface is connected with light every device, can greatly reduce the influence to drive circuit by Optical Fiber Transmission clock pulse light back wave；
Optical sender includes input interface, light source, drive circuit and light every device, light source, drive circuit and light are sequentially connected every device, the input interface is connected with drive circuit, light is connected every device with output interface, also include automatically controlling power circuit, the power circuit that automatically controls is connected with drive circuit.After the multiple signals that front-end camera is transmitted are mixed into signal all the way through multichannel mixer, it is sent to the input of optical sender, by input interface circuit by after enhanced processing, carry out automatically controlled decay, it is transformed to carry out electrical/optical modulation by light source and drive circuit again after being suitable to the pattern of circuit transmission, converts electrical signals to optical signal transmission to output interface circuit；Output interface is connected with light every device, can greatly reduce the influence that light back wave is emitted during by Optical Fiber Transmission to drive circuit.
Embodiment 2
As shown in Figure 1, the present embodiment is on the basis of embodiment 1, the power circuit that automatically controls includes control circuit and by control circuit, it is described to control circuit for operational amplifier, it is described that photodiode and laser diode are included by control circuit, the adjustment end and laser diode of the operational amplifier, the feedback end of operational amplifier are connected with photodiode, and laser diode is connected with photodiode.
The luminous power of laser diode is set by operational amplifier first, so that it is determined that flowing through the electric current of laser diode, be mapped on photodiode for a certain proportion of illumination 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 is considered as laser and lasing fluorescence power is the power for setting；
If flowing through the electric current increase of laser diode, laser diode luminous power will increase, the luminous power for being irradiated to photodiode will increase, so as to the electric current for feeding back to operational amplifier will increase, at this moment operational amplifier will be considered that the luminous power of laser diode is excessive, the electric current for flowing through laser diode will be reduced, so as to allow laser diode luminous power to reduce, the luminous power for being irradiated to photodiode can also reduce, the electric current for feeding back to drive circuit can also reduce, until operational amplifier to laser diode electric current to setting value；
Likewise, if the luminous power of laser diode declines, the luminous power that photodiode is received can also reduce, and the electric current for feeding back to operational amplifier can reduce, and operational amplifier will increase and flow through the electric current of laser diode and reach setting value.The operational amplifier of use 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, and realization is automatically controlled to luminous power.
Embodiment 3
As shown in figure 1, the present embodiment is on the basis of embodiment 1, the operational amplifier is built-in with charge pump, when the operational amplifier using built-in charge pump, without negative supply, improves the flexibility that the driver of photodiode is connected with other circuits.
Preferably, the photodiode is backlight monitor photo-diode, stability of the Output optical power under regulation condition of work can be weighed.
Preferably, the operational amplifier is AD8037 type clamper amplifiers.Clamper operational amplifier can be worked with the frequency of highest 10MHz, and total propagation delay is 15ns.Output voltage and electric current can be adjusted, to adapt to different applications by changing gain or clamp voltage.
Claims (5)
1. the power autocontrol method of a kind of optical transmitter and receiver, it is characterised in that：After the multiplexed equipment of multiple signals that front-end camera is transmitted first is mixed into signal all the way, it is sent to the input interface of optical sender, by after enhanced processing, carry out automatically controlled decay, it is transformed to carry out electrical/optical modulation by light source and drive circuit again after being suitable to the pattern of circuit transmission, converts electrical signals to optical signal；Output interface is connected with light every device, can greatly reduce the influence to drive circuit by Optical Fiber Transmission clock pulse light back wave.
2. the power autocontrol method of a kind of optical transmitter and receiver according to claim 1, it is characterised in that：The optical sender includes input interface, output interface, light source, drive circuit and light every device, light source, drive circuit and light are sequentially connected every device, the input interface is connected with drive circuit, light is connected every device with output interface, also include automatically controlling power circuit, the power circuit that automatically controls is connected with drive circuit.
3. the power autocontrol method of a kind of optical transmitter and receiver according to claim 2, it is characterised in that：The power circuit that automatically controls includes drive circuit, photodiode and laser diode, the adjustment end of the drive circuit is connected with laser diode, the feedback end of drive circuit is connected with photodiode, laser diode is connected with photodiode, also include the operational amplifier being connected with photodiode, the operational amplifier is connected with the feedback end of drive circuit.
4. the power autocontrol method of a kind of optical transmitter and receiver according to claim 2, it is characterised in that：The operational amplifier is built-in with charge pump.
5. the power autocontrol method of a kind of optical transmitter and receiver according to claim 3, it is characterised in that：The photodiode is backlight monitor photo-diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510848964.6A CN106817166A (en) | 2015-11-28 | 2015-11-28 | A kind of power autocontrol method of optical transmitter and receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510848964.6A CN106817166A (en) | 2015-11-28 | 2015-11-28 | A kind of power autocontrol method of optical transmitter and receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106817166A true CN106817166A (en) | 2017-06-09 |
Family
ID=59103372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510848964.6A Pending CN106817166A (en) | 2015-11-28 | 2015-11-28 | A kind of power autocontrol method of optical transmitter and receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106817166A (en) |
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2015
- 2015-11-28 CN CN201510848964.6A patent/CN106817166A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170609 |