CN106814771A - A kind of autocontrol method of optical transmitter and receiver emitter temperature - Google Patents
A kind of autocontrol method of optical transmitter and receiver emitter temperature Download PDFInfo
- Publication number
- CN106814771A CN106814771A CN201510849710.6A CN201510849710A CN106814771A CN 106814771 A CN106814771 A CN 106814771A CN 201510849710 A CN201510849710 A CN 201510849710A CN 106814771 A CN106814771 A CN 106814771A
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- temperature
- photoelectric device
- circuit
- thermistor
- control circuit
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Semiconductor Lasers (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of autocontrol method of optical transmitter and receiver emitter temperature, multichannel video camera in front end transmits to multiplexing equipment captured picture signal first, after multi-way signal multiplexing is suitable to the pattern of circuit transmission into signal all the way and being converted into, again by automatically controlling power circuit, make the optical output power stabilization of light source, light source converts electrical signals to optical signal, finally transmits to optical fiber；The temperature of photoelectric device is raised increases threshold value, the intensity of saturation output light declines, the heat sink contact of the cold end and photoelectric device of refrigerator, thermistor detects the temperature in photoelectric device interface and passes it on temperature-control circuit as sensor, refrigerating capacity is changed by temperature-control circuit, photoelectric device power out-put characteristic is set to keep constant, circuit constitutes transducing electric bridge by R1, R2, R3 and thermistor RT, the change of temperature is converted to by electric bridge the change of electricity.
Description
Technical field
The present invention relates to computer network transmission technology, a kind of autocontrol method of optical transmitter and receiver emitter temperature is specifically referred to.
Background technology
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 photoelectric device is the perfect light source of High Speed Modulation, and change of the semiconductor photoelectric device to temperature is very sensitive, and the change of temperature and the aging of device bring unstability to photoelectric device.To ensure normal, unobstructed communication, the temperature of the photoelectric device 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 autocontrol method of optical transmitter and receiver emitter temperature to solve the low problem of photoelectric device temperature stability, reaches the purpose for improving photoelectric device service life.
The purpose of the present invention reaches by the following technical programs：
Front end multichannel video camera first of the invention transmits to multiplexing equipment captured picture signal, after multi-way signal multiplexing is suitable to the pattern of circuit transmission into signal all the way and being converted into, again by automatically controlling power circuit, make the optical output power stabilization of light source, light source converts electrical signals to optical signal, finally transmits to optical fiber；The temperature of photoelectric device is raised increases threshold value, the intensity of saturation output light declines, the heat sink contact of the cold end and photoelectric device of refrigerator, thermistor detects the temperature in photoelectric device interface and passes it on temperature-control circuit as sensor, refrigerating capacity is changed by temperature-control circuit, photoelectric device power out-put characteristic is set to keep constant, circuit constitutes transducing electric bridge by R1, R2, R3 and thermistor RT, the change of temperature is converted to by electric bridge the change of electricity.The differential input terminal of amplifier A is connected across the opposite end of electric bridge, is used to change the base current of triode V.In design temperature, regulation R3 makes bridge balance, 2 points of A, B not have potential difference, and the signal for being transferred to amplifier A is zero, and the electric current for flowing through refrigerator TEC is also zero；When environment temperature is raised, the tube core and heat sink temperature of LD are raised, reduce the resistance of the thermistor RT with negative temperature coefficient, electric bridge disequilibrium, the current potential of B points is less than A points, the output voltage of amplifier A is raised, the base current increase of V, the electric current of refrigerator also increases, the reduction of refrigeration end temperature, heat sink and tube core temperature is also reduced, therefore keeping temperature is constant.
The temperature-control circuit includes automatically controlling power circuit, also include A.T.C module, the A.T.C module includes refrigerator, thermistor and temperature-control circuit, the cold end of refrigerator is connected with the photoelectric device for automatically controlling power circuit, thermistor is arranged on the photoelectric device for automatically controlling power circuit, thermistor is connected with temperature-control circuit, and the power circuit that automatically controls is connected with A.T.C module.
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 other end is connected with the feedback end of drive circuit, and the laser diode is connected with temperature-control circuit.
The photodiode is backlight monitor photo-diode.
The amplifier is AD8037.
The present invention compared with prior art, has the following advantages that and beneficial effect：
1st, thermistor of the present invention detects the temperature in photoelectric device interface and passes it on temperature-control circuit as sensor, refrigerating capacity is changed by temperature-control circuit, may be such that the temperature of photoelectric device remains at 25 DEG C or so, keep photoelectric device power out-put characteristic constant, ensure optical sender normal work all the time.
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 block diagram of temperature-control circuit；
Fig. 2 is the schematic diagram of temperature-control circuit.
Specific embodiment
Embodiment 1
As depicted in figs. 1 and 2, front end multichannel video camera first of the invention transmits to multiplexing equipment captured picture signal, after multi-way signal multiplexing is suitable to the pattern of circuit transmission into signal all the way and being converted into, again by automatically controlling power circuit, make the optical output power stabilization of light source, light source converts electrical signals to optical signal, finally transmits to optical fiber；The temperature of photoelectric device is raised increases threshold value, the intensity of saturation output light declines, the heat sink contact of the cold end and photoelectric device of refrigerator, thermistor detects the temperature in photoelectric device interface and passes it on temperature-control circuit as sensor, refrigerating capacity is changed by temperature-control circuit, photoelectric device power out-put characteristic is set to keep constant, circuit constitutes transducing electric bridge by R1, R2, R3 and thermistor RT, the change of temperature is converted to by electric bridge the change of electricity.The differential input terminal of amplifier A is connected across the opposite end of electric bridge, is used to change the base current of triode V.In design temperature, regulation R3 makes bridge balance, 2 points of A, B not have potential difference, and the signal for being transferred to amplifier A is zero, and the electric current for flowing through refrigerator TEC is also zero；When environment temperature is raised, the tube core and heat sink temperature of LD are raised, reduce the resistance of the thermistor RT with negative temperature coefficient, electric bridge disequilibrium, the current potential of B points is less than A points, the output voltage of amplifier A is raised, the base current increase of V, the electric current of refrigerator also increases, the reduction of refrigeration end temperature, heat sink and tube core temperature is also reduced, therefore keeping temperature is constant；
Temperature-control circuit includes automatically controlling power circuit, also include A.T.C module, the A.T.C module includes refrigerator, thermistor and temperature-control circuit, the cold end of refrigerator is connected with the photoelectric device for automatically controlling power circuit, thermistor is arranged on the photoelectric device for automatically controlling power circuit, thermistor is connected with temperature-control circuit, and the power circuit that automatically controls is connected with A.T.C module.Front end multichannel video camera transmits to multiplexing equipment captured picture signal, after multi-way signal multiplexing is suitable to the pattern of circuit transmission into signal all the way and being converted into, again by automatically controlling power circuit, make the optical output power stabilization of light source, light source converts electrical signals to optical signal, finally transmits to optical fiber；
With the increase of working time, the temperature of photoelectric device can be raised slowly, will increase threshold value, and the intensity of saturation output light can decline, so to ensure that optical sender remains normal work, the automatic temperature-adjusting control module of setting can ensure photoelectric device in constant temperature（Usually 25 DEG C）Under the conditions of work.The heat sink contact of the cold end and photoelectric device of refrigerator, thermistor detects the temperature in photoelectric device interface and passes it on temperature-control circuit as sensor, and refrigerating capacity is changed by temperature-control circuit, photoelectric device power out-put characteristic is kept constant.Electric routing resistance R1, R2, R3 and thermistor RT composition transducing electric bridges, are converted to the change of temperature by electric bridge the change of electricity.R4 connects with amplifier A, with the electric current of stabilizing amplifier A.The differential input terminal of amplifier A is connected across the opposite end of electric bridge, is used to change the base current of triode V.In design temperature, regulation R3 makes bridge balance, 2 points of A, B not have potential difference, and the signal for being transferred to amplifier A is zero, and the electric current for flowing through refrigerator TEC is also zero.When environment temperature is raised, the tube core and heat sink temperature of LD are raised, and reduce the resistance of the thermistor RT with negative temperature coefficient, electric bridge disequilibrium.At this moment, the current potential of B points is less than A points, and the output voltage of amplifier A is raised, and the base current increase of V, the electric current of refrigerator also increases, the reduction of refrigeration end temperature, and heat sink and tube core temperature is also reduced, therefore keeping temperature is constant.
Embodiment 2
As shown in Figure 1, the present embodiment is on the basis of embodiment 1, the automatic power control circuit 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 other end is connected with the feedback end of drive circuit, and the laser diode is connected with temperature-control circuit.
The luminous power of laser diode is set by amplifying circuit first, so that it is determined that the electric current of laser diode is flowed through, while a certain proportion of illumination is mapped to photodiode by laser diode（PIN）On, photodiode（PIN）Corresponding electric current, electric current will be produced to return amplifying circuit, 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, and be irradiated to photodiode（PIN）Luminous power will increase, so as to the electric current for feeding back to amplifier will increase, at this moment amplifier will be considered that the luminous power of laser diode is excessive, will reduce the electric current for flowing through laser diode, so as to allow laser diode luminous power to reduce, photodiode is irradiated to（PIN）Luminous power can also reduce, the electric current for feeding back to drive circuit can also reduce, until amplifier to laser diode electric current to setting value；
If likewise, the luminous power decline of laser diode, photodiode（PIN）The luminous power for receiving can also be reduced, and the electric current for feeding back to amplifier can reduce, and amplifier will increase and flow through the electric current of laser diode and reach setting value.The amplifier of use has the characteristic of wide bandwidth, high pressure Slew Rate and abundant steady-state current, instead of photodiode（PIN）In discrete designed drive circuit and driver, realization automatically controls to luminous power.Laser diode is connected with temperature-control circuit, and while luminous power is controlled, the temperature for maintaining photoelectric device is constant, makes it stable work.
Embodiment 3
As shown in figure 1, the present embodiment is on the basis of embodiment 1 or embodiment 2, it is described it is amplifier embedded have charge pump, when the amplifier using built-in charge pump, without negative supply, improve 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 op-amp is AD8037 type clamper amplifiers.Clamper 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. a kind of autocontrol method of optical transmitter and receiver emitter temperature, it is characterised in that：Multichannel video camera in front end transmits to multiplexing equipment captured picture signal first, after multi-way signal multiplexing is suitable to the pattern of circuit transmission into signal all the way and being converted into, again by automatically controlling power circuit, make the optical output power stabilization of light source, light source converts electrical signals to optical signal, finally transmits to optical fiber；The temperature of photoelectric device is raised increases threshold value, the intensity of saturation output light declines, the heat sink contact of the cold end and photoelectric device of refrigerator, thermistor detects the temperature in photoelectric device interface and passes it on temperature-control circuit as sensor, refrigerating capacity is changed by temperature-control circuit, photoelectric device power out-put characteristic is set to keep constant, circuit constitutes transducing electric bridge by R1, R2, R3 and thermistor RT, the change of temperature is converted to by electric bridge the change of electricity；The differential input terminal of amplifier A is connected across the opposite end of electric bridge, is used to change the base current of triode V；In design temperature, regulation R3 makes bridge balance, 2 points of A, B not have potential difference, and the signal for being transferred to amplifier A is zero, and the electric current for flowing through refrigerator TEC is also zero；When environment temperature is raised, the tube core and heat sink temperature of LD are raised, reduce the resistance of the thermistor RT with negative temperature coefficient, electric bridge disequilibrium, the current potential of B points is less than A points, the output voltage of amplifier A is raised, the base current increase of V, the electric current of refrigerator also increases, the reduction of refrigeration end temperature, heat sink and tube core temperature is also reduced, therefore keeping temperature is constant.
2. the autocontrol method of a kind of optical transmitter and receiver emitter temperature according to claim 1, it is characterised in that：The temperature-control circuit includes automatically controlling power circuit, also include A.T.C module, the A.T.C module includes refrigerator, thermistor and temperature-control circuit, the cold end of refrigerator is connected with the photoelectric device for automatically controlling power circuit, thermistor is arranged on the photoelectric device for automatically controlling power circuit, thermistor is connected with temperature-control circuit, and the power circuit that automatically controls is connected with A.T.C module.
3. the autocontrol method of a kind of optical transmitter and receiver emitter temperature 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 other end is connected with the feedback end of drive circuit, and the laser diode is connected with temperature-control circuit.
4. the autocontrol method of a kind of optical transmitter and receiver emitter temperature according to claim 2, it is characterised in that：The photodiode is backlight monitor photo-diode.
5. the autocontrol method of a kind of optical transmitter and receiver emitter temperature according to claim 3, it is characterised in that：The operational amplifier is AD8037.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510849710.6A CN106814771A (en) | 2015-11-28 | 2015-11-28 | A kind of autocontrol method of optical transmitter and receiver emitter temperature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510849710.6A CN106814771A (en) | 2015-11-28 | 2015-11-28 | A kind of autocontrol method of optical transmitter and receiver emitter temperature |
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| Publication Number | Publication Date |
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| CN106814771A true CN106814771A (en) | 2017-06-09 |
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| CN201510849710.6A Pending CN106814771A (en) | 2015-11-28 | 2015-11-28 | A kind of autocontrol method of optical transmitter and receiver emitter temperature |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109508055A (en) * | 2018-11-28 | 2019-03-22 | 北京遥测技术研究所 | Temperature in spaceborne laser based on negative-feedback controls analog closed-loop method and system |
| CN109579352A (en) * | 2018-11-09 | 2019-04-05 | 中国科学院长春光学精密机械与物理研究所 | A kind of refrigerator for photodetector |
| CN109656281A (en) * | 2017-10-11 | 2019-04-19 | 湖南中部芯谷科技有限公司 | A kind of optical fibre gyro thermoelectric cooling control system |
-
2015
- 2015-11-28 CN CN201510849710.6A patent/CN106814771A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109656281A (en) * | 2017-10-11 | 2019-04-19 | 湖南中部芯谷科技有限公司 | A kind of optical fibre gyro thermoelectric cooling control system |
| CN109579352A (en) * | 2018-11-09 | 2019-04-05 | 中国科学院长春光学精密机械与物理研究所 | A kind of refrigerator for photodetector |
| CN109508055A (en) * | 2018-11-28 | 2019-03-22 | 北京遥测技术研究所 | Temperature in spaceborne laser based on negative-feedback controls analog closed-loop method and system |
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Application publication date: 20170609 |
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