CN201171141Y - Multifunctional drive control device for semiconductor laser - Google Patents
Multifunctional drive control device for semiconductor laser Download PDFInfo
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- CN201171141Y CN201171141Y CNU2007201711913U CN200720171191U CN201171141Y CN 201171141 Y CN201171141 Y CN 201171141Y CN U2007201711913 U CNU2007201711913 U CN U2007201711913U CN 200720171191 U CN200720171191 U CN 200720171191U CN 201171141 Y CN201171141 Y CN 201171141Y
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Abstract
The utility model discloses a multi-functional semiconductor laser driving controller which comprises a reference voltage generator and a modulation signal input end which are connected with an in-phase adder; the in-phase adder is serially connected with a voltage/current converting module, a current driving module and a laser diode; the reference voltage generator is used to generate reference voltage signal; the modulation signal input end is used to input voltage modulation signal; the in-phase adder is used to modulate the reference voltage signal according to the modulation signal; the voltage/current converting module is used to generate current signal directly proportional to the voltage signal transmitted by the in-phase adder according to the voltage signal, and drive the laser dioxide through the current driving module. The semiconductor laser driving controller of the utility model has the functions of stable optical power, continuous adjustability, capability of voltage signal modulation the optical power, soft starting, current limiting protection, over-current protection, optical power monitoring, and displaying by an oscillograph and a voltage meter.
Description
[technical field]
The utility model relates to laser, relates in particular to multifunctional semi-conductor laser device driving control device.
[background technology]
Semiconductor laser has been widely used in fields such as optical communication, laser medicine and optical measurement as a kind of desirable light source device.Semiconductor laser adopts the pouring-in motivational techniques of electric current more, obtain stable luminous power, must guarantee the stable of injection current, use the Driving technique of constant-current source.
Mention a kind of semiconductor laser drive in the Chinese patent " two variable constant currents source tandem drive semiconductor laser apparatus " (application number 200410020378), its circuit structure comprises two triodes, the 1st transistor emitter connects power supply, the 2nd transistor emitter connects the collector electrode of the 1st triode, through overregulating the base stage that resistance connects the 1st triode, the 2nd triode, first constant-current source amplifies after the 2nd transistor collector outputs to laser assembly through the 2nd triode through the amplification of the 1st triode and second constant-current source respectively for first constant-current source and second constant-current source.
The function that does not have the signal modulation in the above-mentioned semiconductor laser drive, in actual applications, usually often need the luminous power of noise spectra of semiconductor lasers output to modulate, promptly require the driving of constant-current source to be modulated by voltage signal, otherwise this drive unit of situation that changes for signal can not adapt to, thereby range of application is little.
[summary of the invention]
Goal of the invention of the present utility model provides a kind of multifunctional semi-conductor laser device driving control device, has the function of modulation signal, applied range.
To achieve the above object of the invention, the utility model proposes following technical scheme:
A kind of multifunctional semi-conductor laser device driving control device, comprise: pedestal generator and modulation signal input, all link to each other with in-phase adder, described in-phase adder links to each other successively with voltage/current conversion module, current drives module, laser diode;
Described pedestal generator is used to produce reference voltage signal, the modulation signal input is used for the input voltage modulation signal, in-phase adder is used for according to modulation signal reference voltage signal being modulated, by voltage/current conversion module, current drives module drive laser diode; Described voltage/current conversion module is used for generating the current signal that is directly proportional with it according to the voltage signal of in-phase adder transmission, by current drives module drive laser diode.
Wherein, described laser diode comprises light-emitting diode (LD), described LD links to each other with the current sample module, and described current sample module and threshold setting module together are connected in comparison circuit, and described comparison circuit links to each other with the current drives module by current control module;
Described comparison circuit is used for sampled value and threshold value are compared, and when sampled value during greater than threshold value, reduces the current value of current drives module by current control module.
Wherein, described laser diode also comprises optical receiver (PD), and described PD links to each other with high pass filter with low pass filter respectively through current/voltage converter, amplifier.
Preferably, described low pass filter links to each other with voltmeter, and described high pass filter links to each other with oscilloscope.
Wherein, described in-phase adder, voltage/current conversion module, comparison circuit, current/voltage converter, amplifier, low pass filter and high pass filter are realized by four-operational amplifier.
Preferably, described threshold setting module comprises charging capacitor, discharge diode and a resistance that is used for soft start.
Preferably, described reference generator comprises reference voltage source and variable resistor.
Wherein, described current control module links to each other with comparison circuit, and is realized by the triode of a positive-negative-positive.
Preferably, described current drives module comprises diode and the capacitor that suppresses High-frequency Interference and protection.
As can be seen from the above technical solutions, the utility model carries out the signal modulation to reference voltage, can adapt to the situation that various signals change, and has widened the scope of using.But semiconductor laser drive of the present utility model has light power stabilising, the function of adjustable, luminous power voltage signal modulation continuously; the function that also has soft start, current-limiting protection, overcurrent protection; also have luminous power is monitored, and the function that shows by oscilloscope, voltmeter.
[description of drawings]
Fig. 1 is the structured flowchart of the utility model multifunctional semi-conductor laser device driving control device;
Fig. 2 is the physical circuit figure of the utility model multifunctional semi-conductor laser device driving control device.
[embodiment]
Below in conjunction with specific embodiment the technical solution of the utility model is described in detail.
As depicted in figs. 1 and 2, the utility model multifunctional semi-conductor laser device driving control device comprises pedestal generator, modulation signal input, all be connected to in-phase adder, in-phase adder is connected with voltage/current modular converter, current drives module, laser diode.Laser diode comprises light-emitting diode (LD) and optical receiver (PD), and LD links to each other with the current sample module, and current sample module and threshold setting module together are connected to comparison circuit, and described comparison circuit links to each other with the current drives module by current control module; PD connects with current/voltage converter, amplifier, and amplifier links to each other with high pass filter with low pass filter respectively, and low pass filter links to each other with voltmeter, and high pass filter links to each other with oscilloscope.
For reaching the purpose of range of application light, the utility model provides a kind of multifunctional semi-conductor laser device driving control device, comprise pedestal generator and modulation signal input, all link to each other with in-phase adder, described in-phase adder links to each other successively with voltage/current conversion module, current drives module, laser diode; Described pedestal generator is used to produce reference voltage signal, the modulation signal input is used for the input voltage modulation signal, the modulation signal input can be imported the various voltage signals of different frequency, different wave in the present embodiment, in-phase adder is used for according to modulation signal reference voltage signal being modulated, the voltage/current conversion module is used for generating the current signal that is directly proportional with it according to the voltage signal of in-phase adder transmission, by current drives module drive laser diode.
The utility model has increased the modulation signal input, and the function of modulation signal is provided, and has improved the signal anti-jamming capacity, can adapt to the occasion that various signals change, and has widened the scope of using.
In the present embodiment, laser diode generally can comprise light-emitting diode (LD) and/or optical receiver (PD).
In the present embodiment, LD links to each other with the current sample module, and the circuit of LD is sampled; By the setting of deboost, with sample rate current with the comparison of threshold value is set, judge whether to carry out Current Control, if sampled value greater than the threshold value of setting, then reduces the current value that passes through in the current drives module by current control module.
The utility model is by carrying out current sample to LD, and the current conditions of supervisory circuit when taking place current sampling data greater than threshold value, can be controlled drive current automatically constantly, and LD is not damaged with protection.
In the present embodiment, PD links to each other with the current/voltage-converted module, by detecting light intensity, converts light intensity to the signal of telecommunication; After the amplifier processing, carry out filtering: high pass filter links to each other with oscilloscope, is used for the changing unit of display light power; Low pass filter links to each other with voltmeter, is used for the steady component of display light power.
The utility model is monitored the power of light by PD, observe the changing unit of contrast modulation signal and luminous power by oscilloscope, or observe the steady component of contrast reference voltage and luminous power by voltmeter, can understand entire circuit intuitively and comprise whether semiconductor laser normally moves.
Pedestal generator has stable luminous power in the utility model, and in a preferred embodiment, pedestal generator specifically comprises reference voltage source and a variable resistor, realizes the continuously adjustable function of power.
In specific embodiment, described current control module can be realized by the triode of a positive-negative-positive.
In specific embodiment, described current drives module can also comprise a NPN triode, suppress the diode and the capacitor of High-frequency Interference and protection.
In the present embodiment, described threshold setting module can also comprise the charging capacitor and the resistance that are used for soft start, thereby had soft start function, threshold value is higher when just starting reduces gradually again, corresponding, bigger when just starting to the drive current restriction, do not allow very big electric current to pass through, threshold value just slowly reduces afterwards, and circuit just is able to by big electric current, and the instantaneous large-current when preventing circuit start causes damage to circuit.
When power failure taking place and send a telegram here fast again, low less to the drive current restriction because of the enabling gate limit value for avoiding appearance, the very big electric current of permission passes through, and causes the semiconductor laser damage.The threshold setting module can also be provided with a discharge diode D4, the repid discharge restore circuit, and threshold value is higher when guaranteeing to start, and avoids circuit to be damaged.
As shown in Figure 2, in concrete circuit is realized, above-mentioned in-phase adder, voltage/current conversion module, comparison circuit, current/voltage converter, amplifier, low pass filter and high pass filter all can be realized by four-operational amplifier, in a preferred embodiment, four-operational amplifier can select LM324 to realize.
Above-mentioned LD, PD are realized by D2, D1 that respectively the current sample module has resistance R 19 to realize.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (8)
1, a kind of multifunctional semi-conductor laser device driving control device is characterized in that, comprising:
Pedestal generator and modulation signal input all link to each other with in-phase adder, and described in-phase adder links to each other successively with voltage/current conversion module, current drives module, laser diode;
Described pedestal generator is used to produce reference voltage signal, the modulation signal input is used for the input voltage modulation signal, in-phase adder is used for according to modulation signal reference voltage signal being modulated, by voltage/current conversion module, current drives module drive laser diode; Described voltage/current conversion module is used for generating the current signal that is directly proportional with it according to the voltage signal of in-phase adder transmission, by current drives module drive laser diode.
2, multifunctional semi-conductor laser device driving control device according to claim 1 is characterized in that:
Described laser diode comprises light-emitting diode LD, and described LD links to each other with the current sample module, and described current sample module and threshold setting module together are connected in comparison circuit, and described comparison circuit links to each other with the current drives module by current control module;
Described comparison circuit is used for sampled value and threshold value are compared, and when sampled value during greater than threshold value, reduces the current value of current drives module by current control module.
3, multifunctional semi-conductor laser device driving control device according to claim 1 is characterized in that:
Described laser diode also comprises optical receiver PD, and described PD links to each other with high pass filter with low pass filter respectively through current/voltage converter, amplifier.
4, multifunctional semi-conductor laser device driving control device according to claim 3, it is characterized in that: described low pass filter links to each other with voltmeter, and described high pass filter links to each other with oscilloscope.
5, multifunctional semi-conductor laser device driving control device according to claim 2, it is characterized in that: described threshold setting module comprises the charging capacitor, discharge diode and the resistance that are used for soft start, described charging capacitor, discharge diode and resistance three parallel connection.
6, multifunctional semi-conductor laser device driving control device according to claim 1 is characterized in that: described reference generator comprises reference voltage source and the variable resistor that is attached thereto.
7, multifunctional semi-conductor laser device driving control device according to claim 2, it is characterized in that: described current control module links to each other with comparison circuit, and is realized by the triode of a positive-negative-positive.
8, according to each described multifunctional semi-conductor laser device driving control device in the claim 1～7; it is characterized in that: described current drives module comprises the NPN triode, suppresses the diode and the capacitor of High-frequency Interference and protection, and described diode links to each other with the capacitor parallel connection and with described NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201711913U CN201171141Y (en) | 2007-12-04 | 2007-12-04 | Multifunctional drive control device for semiconductor laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201711913U CN201171141Y (en) | 2007-12-04 | 2007-12-04 | Multifunctional drive control device for semiconductor laser |
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| Publication Number | Publication Date |
|---|---|
| CN201171141Y true CN201171141Y (en) | 2008-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007201711913U Expired - Fee Related CN201171141Y (en) | 2007-12-04 | 2007-12-04 | Multifunctional drive control device for semiconductor laser |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009155744A1 (en) * | 2008-06-26 | 2009-12-30 | 广州金升阳科技有限公司 | Signal converting circuit and isolation amplifier |
| CN103337781A (en) * | 2013-07-19 | 2013-10-02 | 广东东研网络科技股份有限公司 | Overcurrent latch-up protective circuit of pumping laser |
| CN104078833A (en) * | 2013-03-29 | 2014-10-01 | 山东华光光电子有限公司 | High-power semiconductor laser with integrated packaging over-current protection device |
| CN106654854A (en) * | 2017-01-10 | 2017-05-10 | 光梓信息科技（上海）有限公司 | Overvoltage protection device and method for complementary metal oxide semiconductor (CMOS) laser driver |
| CN109217101A (en) * | 2018-09-29 | 2019-01-15 | 武汉光迅电子技术有限公司 | A kind of laser diode current driving circuit and driving method with maximum current protection |
| CN111276866A (en) * | 2020-02-15 | 2020-06-12 | 太原理工大学 | Semiconductor laser power control system based on SoC FPGA |
-
2007
- 2007-12-04 CN CNU2007201711913U patent/CN201171141Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009155744A1 (en) * | 2008-06-26 | 2009-12-30 | 广州金升阳科技有限公司 | Signal converting circuit and isolation amplifier |
| CN104078833A (en) * | 2013-03-29 | 2014-10-01 | 山东华光光电子有限公司 | High-power semiconductor laser with integrated packaging over-current protection device |
| CN103337781A (en) * | 2013-07-19 | 2013-10-02 | 广东东研网络科技股份有限公司 | Overcurrent latch-up protective circuit of pumping laser |
| CN103337781B (en) * | 2013-07-19 | 2016-08-31 | 广东东研网络科技股份有限公司 | Pump laser crosses stream latch-up protection circuit |
| CN106654854A (en) * | 2017-01-10 | 2017-05-10 | 光梓信息科技（上海）有限公司 | Overvoltage protection device and method for complementary metal oxide semiconductor (CMOS) laser driver |
| CN106654854B (en) * | 2017-01-10 | 2019-05-17 | 光梓信息科技（上海）有限公司 | A kind of over-pressure safety device and method for CMOS laser driver |
| CN109217101A (en) * | 2018-09-29 | 2019-01-15 | 武汉光迅电子技术有限公司 | A kind of laser diode current driving circuit and driving method with maximum current protection |
| CN109217101B (en) * | 2018-09-29 | 2020-03-10 | 武汉光迅电子技术有限公司 | Laser current driving circuit with maximum current protection and driving method |
| CN111276866A (en) * | 2020-02-15 | 2020-06-12 | 太原理工大学 | Semiconductor laser power control system based on SoC FPGA |
| CN111276866B (en) * | 2020-02-15 | 2021-04-20 | 太原理工大学 | Semiconductor laser power control system based on SoC FPGA |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081224 Termination date: 20111204 |