CN203313195U - Automatic control-power optical transmitter - Google Patents
Automatic control-power optical transmitter Download PDFInfo
- Publication number
- CN203313195U CN203313195U CN2013203799676U CN201320379967U CN203313195U CN 203313195 U CN203313195 U CN 203313195U CN 2013203799676 U CN2013203799676 U CN 2013203799676U CN 201320379967 U CN201320379967 U CN 201320379967U CN 203313195 U CN203313195 U CN 203313195U
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- optical
- drive circuit
- operational amplifier
- photodiode
- driving circuit
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- Semiconductor Lasers (AREA)
Abstract
The utility model discloses an automatic control-power optical transmitter. The optical transmitter comprises an input interface, an output interface, a light source, a driving circuit and an optical isolation device. The light source, the driving circuit and the optical isolation device are successively connected. The input interface is connected with the driving circuit. The optical isolation device is connected with the output interface. An automatic control power circuit is also comprised. The automatic control power circuit is connected with the driving circuit. Multipath signals transmitted by a front-end camera are mixed into one path of the signal through multiplexing equipment and sent to the input interface of the optical transmitter. After amplification processing, electric control attenuation is performed and the signal is converted into the signal with a code pattern which is suitable for line transmission, and then the light source and the driving circuit carry out electrical/optical modulation so that the electric signal is converted into an optical signal. The output interface is connected with the optical isolation device. An influence of a pulse light reflection wave on the driving circuit during optical fiber transmission can be greatly reduced.
Description
Technical field
The utility model relates to the computer network transmission technology, specifically refers to a kind of optical sender of automatic power ratio control.
Background technology
Optical transmitter and receiver is an optical fiber communication equipment that extends transfer of data, it be mainly by signal modulate, the technology such as photoelectric conversion, utilize light-transfer characteristic to reach the purpose of remote transmission.The general paired use of optical transmitter and receiver, be divided into optical sender and optical receiver, and optical sender completes electricity/light conversion, and light signal is launched for Optical Fiber Transmission; Optical receiver is mainly that the light signal received from optical fiber is restored as the signal of telecommunication, completes light/electricity conversion.The optical transmitter and receiver effect is exactly for the remote transmission data.
During the basic function of optical fiber communication optical sender, the signal of telecommunication of carry information is converted to light signal, and light signal is sent in optical fiber, 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 semiconductor laser is very sensitive to the variation of temperature, and the aging of the variation of temperature and device brought unsteadiness to laser, thereby 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.
The utility model content
The utility model, by a kind of optical sender of automatic power ratio control is set, solves the problems such as the light source luminescent power stability is low, reaches and improves the laser purpose in useful life.
The purpose of this utility model reaches by the following technical programs:
The utility model comprises that input interface, output interface, light source, drive circuit and light are every device, light source, drive circuit and light are connected successively every device, described input interface is connected with drive circuit, light is connected with output interface every device, also comprise automatic power ratio control circuit, described automatic power ratio control circuit is connected with drive circuit.The multiple signals that front-end camera transmits are after multiplexing equipment is mixed into a road signal, be sent to the input interface of optical sender, after amplifying processing, carry out automatically controlled decay, after being transformed to the pattern that is suitable for the circuit transmission, by light source and drive circuit, carry out electricity/light modulation again, convert electrical signals to light signal; Output interface is connected with light every device, can greatly reduce by the impact of Optical Fiber Transmission clock pulse light reflected wave on drive circuit.
Further, described automatic power ratio control circuit 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 comprise the operational amplifier be connected with photodiode, described operational amplifier is connected with the feedback end of drive circuit.
At first by operational amplifier, set the luminous power of laser diode, thereby determine the electric current that flows through laser diode, laser diode is mapped to a certain proportion of illumination on photodiode simultaneously, photodiode will produce corresponding electric current, electric current returns operational amplifier, the laser diode luminous power is in the power bracket of setting, and lasing fluorescence power is the power of setting to laser diode with regard to thinking laser;
If flowing through the electric current of laser diode increases, the laser diode luminous power will increase, the luminous power that shines photodiode will increase, thereby the electric current that feeds back to operational amplifier will increase, at this moment operational amplifier can think that the luminous power of laser diode is excessive, will reduce to flow through the electric current of laser diode, thereby allow the laser diode luminous power reduce, the luminous power that shines photodiode also can reduce, the electric current that feeds back to drive circuit also can reduce, until operational amplifier to the electric current of laser diode to set point;
Same, if the luminous power of laser diode descends, the luminous power that photodiode receives also can reduce, and the electric current that feeds back to operational amplifier can reduce, and operational amplifier will increase the electric current that flows 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, has replaced discrete designed drive circuit and driver in the photodiode, realizes the automatic control to luminous power.
Further, described operational amplifier is built-in with charge pump.When using the operational amplifier of built-in charge pump, need not negative supply, improved the flexibility that the driver of photodiode is connected with other circuit.
Further, as preferably, described photodiode is monitor photo-diode backlight, can weigh the stability of Output optical power under the regulation condition of work.
Further, as preferably, described operational amplifier is AD8037 type clamper amplifier.The clamper operational amplifier can be with the frequency work of the highest 10MHz, and total propagation delay is 15ns.Can gain or clamp voltage by change, adjust output voltage and electric current, to adapt to different application.
The utility model compared with prior art, have following advantage and a beneficial effect:
1 the utility model comprises that input interface, output interface, light source, drive circuit and light are every device, light source, drive circuit and light are connected successively every device, described input interface is connected with drive circuit, light is connected with output interface every device, also comprise automatic power ratio control circuit, described automatic power ratio control circuit is connected with drive circuit.Output interface is connected with light every device, can greatly reduce by the impact of Optical Fiber Transmission clock pulse light reflected wave on drive circuit.
2 operational amplifiers of the present utility model are built-in with charge pump, when using the operational amplifier of built-in charge pump, need not negative supply, and improved the flexibility that the driver of photodiode is connected with other circuit.
The accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model.
Embodiment
Embodiment 1
As shown in Figure 1, the present embodiment comprises that input interface, light source, drive circuit and light are every device, light source, drive circuit and light are connected successively every device, described input interface is connected with drive circuit, light is connected with output interface every device, also comprise automatic power ratio control circuit, described automatic power ratio control circuit is connected with drive circuit.The multiple signals that front-end camera transmits are after multichannel mixer is mixed into a road signal, be sent to the input of optical sender, by input interface circuit through after amplify processing, carry out automatically controlled decay, after being transformed to the pattern that is suitable for the circuit transmission, by light source and drive circuit, carry out electricity/light modulation again, convert electrical signals to optical signal transmission to output interface circuit; Output interface is connected with light every device, in the time of can greatly reducing by Optical Fiber Transmission, emits the impact of light reflected wave on drive circuit.
Embodiment 2
As shown in Figure 1, the present embodiment is on the basis of embodiment 1, described automatic power ratio control circuit comprises control circuit and is controlled circuit, described control circuit is operational amplifier, describedly controlled circuit and comprised photodiode and laser diode, adjustment end and the laser diode of described operational amplifier, the feedback end of operational amplifier is connected with photodiode, and laser diode is connected with photodiode.
At first by operational amplifier, set the luminous power of laser diode, thereby determine the electric current that flows through laser diode, laser diode is mapped to a certain proportion of illumination on photodiode simultaneously, photodiode will produce corresponding electric current, electric current returns operational amplifier, the laser diode luminous power is in the power bracket of setting, and lasing fluorescence power is the power of setting to laser diode with regard to thinking laser;
If flowing through the electric current of laser diode increases, the laser diode luminous power will increase, the luminous power that shines photodiode will increase, thereby the electric current that feeds back to operational amplifier will increase, at this moment operational amplifier can think that the luminous power of laser diode is excessive, will reduce to flow through the electric current of laser diode, thereby allow the laser diode luminous power reduce, the luminous power that shines photodiode also can reduce, the electric current that feeds back to drive circuit also can reduce, until operational amplifier to the electric current of laser diode to set point;
Same, if the luminous power of laser diode descends, the luminous power that photodiode receives also can reduce, and the electric current that feeds back to operational amplifier can reduce, and operational amplifier will increase the electric current that flows 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, has replaced discrete designed drive circuit and driver in the photodiode, realizes the automatic control to luminous power.
Embodiment 2
As shown in Figure 1, the present embodiment is on the basis of embodiment 1, and described operational amplifier is built-in with charge pump, when using the operational amplifier of built-in charge pump, need not negative supply, and improved the flexibility that the driver of photodiode is connected with other circuit.
As preferably, described photodiode is monitor photo-diode backlight, can weigh the stability of Output optical power under the regulation condition of work.
As preferably, described operational amplifier is AD8037 type clamper amplifier.The clamper operational amplifier can be with the frequency work of the highest 10MHz, and total propagation delay is 15ns.Can gain or clamp voltage by change, adjust output voltage and electric current, to adapt to different application.
Claims (5)
1. the optical sender of an automatic power ratio control, comprise that input interface, output interface, light source, drive circuit and light are every device, light source, drive circuit and light are connected successively every device, described input interface is connected with drive circuit, light is connected with output interface every device, it is characterized in that: also comprise automatic power ratio control circuit, described automatic power ratio control circuit is connected with drive circuit.
2. the optical sender of a kind of automatic power ratio control according to claim 1, it is characterized in that: described automatic power ratio control circuit 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 comprise the operational amplifier be connected with photodiode, described operational amplifier is connected with the feedback end of drive circuit.
3. the optical sender of a kind of automatic power ratio control according to claim 2, it is characterized in that: described operational amplifier is built-in with charge pump.
4. the optical sender of a kind of automatic power ratio control according to claim 2, it is characterized in that: described photodiode is monitor photo-diode backlight.
5. the optical sender of a kind of automatic power ratio control according to claim 3, it is characterized in that: described operational amplifier is AD8037.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203799676U CN203313195U (en) | 2013-10-12 | 2013-10-12 | Automatic control-power optical transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203799676U CN203313195U (en) | 2013-10-12 | 2013-10-12 | Automatic control-power optical transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203313195U true CN203313195U (en) | 2013-11-27 |
Family
ID=49619364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203799676U Expired - Fee Related CN203313195U (en) | 2013-10-12 | 2013-10-12 | Automatic control-power optical transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203313195U (en) |
-
2013
- 2013-10-12 CN CN2013203799676U patent/CN203313195U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131127 Termination date: 20141012 |
|
| EXPY | Termination of patent right or utility model |