CN220510454U - Circuit structure for realizing current protection of multi-channel pumping laser - Google Patents
Circuit structure for realizing current protection of multi-channel pumping laser Download PDFInfo
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- CN220510454U CN220510454U CN202322132353.4U CN202322132353U CN220510454U CN 220510454 U CN220510454 U CN 220510454U CN 202322132353 U CN202322132353 U CN 202322132353U CN 220510454 U CN220510454 U CN 220510454U
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- 238000005086 pumping Methods 0.000 title claims abstract description 73
- 239000004065 semiconductor Substances 0.000 claims abstract description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 3
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 3
- 238000005070 sampling Methods 0.000 claims description 35
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- 230000003321 amplification Effects 0.000 description 1
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Abstract
The utility model relates to a circuit structure for realizing current protection of multipath pumping lasers, which comprises N paths of pumping circuits, wherein N is more than or equal to 1, the circuit structure also comprises N MOS (metal oxide semiconductor) tubes which are respectively positioned in the N paths of pumping circuits, the drain electrode of the N MOS tube is connected with DAC (digital-to-analog converter) signals which are externally input in the N paths of pumping circuits, the source electrode of the N MOS tube is grounded, and the grid electrode of the N MOS tube is connected with the grid electrode of the N-1 MOS tube. The circuit structure for realizing the current protection of the multi-channel pumping laser avoids the failure of the laser module caused by direct failure, and improves the reliability and low failure property of the laser module. The multipath pumping can realize interval switching work and prolong the service life of the pumping body, and finally the whole service life of the laser module is prolonged. The current protection circuit can restrain total current output of double pumping on the premise of overlarge input of an external DAC, and realize hardware limiting function of pumping current, thereby realizing laser pumping protection function.
Description
Technical Field
The utility model relates to the field of lasers, in particular to the field of current protection circuit devices of a multi-path laser light source generating circuit, and specifically relates to a circuit structure for realizing current protection of multi-path pumping lasers.
Background
Semiconductor lasers have been widely used in the communication field, medical field, military field, industrial field, and the like. However, a great feature of the laser is that the power density is very high, and although one type of laser is mainly applied in a short-time pulse mode, damage to equipment and human bodies caused by excessive power is avoided, but if a circuit of a light source of the laser is abnormal, uncontrollable output power of the laser is dangerous. Further, laser generation in order to increase the efficiency and lifetime of laser conversion, the design of multiple pumping is a new and unique design scheme, but this new and unique design, while solving the problems of laser conversion efficiency and lifetime, causes higher regulatory requirements for higher laser safety designs. It is necessary to introduce a separate current protection circuit for the laser generating circuit.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a circuit structure which has good safety, simple structure and wider application range and can realize the current protection of the multi-channel pumping laser.
In order to achieve the above object, the circuit structure for realizing the current protection of the multi-pump laser of the present utility model is as follows:
the circuit structure for realizing the current protection of the multipath pumping laser is mainly characterized by comprising N paths of pumping circuits, wherein N is more than or equal to 1, the circuit structure also comprises N MOS (metal oxide semiconductor) tubes which are respectively positioned in the N paths of pumping circuits, the drain electrode of the N MOS tube is connected with DAC (digital-to-analog converter) signals input from the outside in the N paths of pumping circuits, the source electrode of the N MOS tube is grounded, and the grid electrode of the N MOS tube is connected with the grid electrode of the N-1 MOS tube;
the circuit structure also comprises an N-1 comparator and an adder, wherein the N-1 comparator is respectively connected with the grid electrode of the N-1 MOS tube and the grid electrode of the N MOS tube, the N-1 comparator is connected with the N-1 adder, and the N-1 adder is also respectively connected with the N-1 pumping circuit and the pumping current output end of the N pumping circuit.
Preferably, each pump circuit comprises a current adjusting operational amplifier module, a current sampling amplifying operational amplifier module, a DC-DC module, a current sampling resistor module and a pump laser luminous tube, wherein the input end of the current adjusting operational amplifier module is connected with DAC signals input from the outside, the current sampling amplifying operational amplifier module and the DC-DC module are connected with the current adjusting operational amplifier module, the other two ports of the current sampling amplifying operational amplifier module are respectively connected with two ends of the current sampling resistor module, the DC-DC module is connected with the current sampling resistor module, the positive electrode of the pump laser luminous tube is connected with the current sampling resistor module, and the negative electrode of the pump laser luminous tube is grounded.
Preferably, the N-1 th adder is also connected with the current sampling amplifying operational amplifier module of the N-1 th pumping circuit and the current sampling amplifying operational amplifier module of the N-1 th pumping circuit respectively.
Preferably, the N-th pumping circuit further comprises a bias resistor, one end of the bias resistor is connected with an externally input DAC signal, and the other end of the bias resistor is connected with the current adjusting operational amplifier module and the drain electrode of the N-th MOS tube.
Preferably, the current output of the pumping laser luminotron is controlled by DAC signals input from outside.
Preferably, the current adjusting operational amplifier module controls the FB feedback pin of the DC-DC module according to the DAC value and the current sampling amplifying operational amplifier value which are input externally.
By adopting the circuit structure for realizing the current protection of the multi-pump laser, the multi-pump can output high-power laser without high-power pump, and meanwhile, the problem of too short service life of the laser caused by loss and aging of the pump is avoided. When single pump failure occurs, the laser module can be operated by another pump, so that the phenomenon that the laser module is directly failed to cause no operation is avoided, and the reliability and low failure property of the laser module are improved. The multipath pumping can realize interval switching work and prolong the service life of the pumping body, and finally the whole service life of the laser module is prolonged. The current protection circuit can restrain total current output of double pumping on the premise of overlarge input of an external DAC, and realize hardware limiting function of pumping current, thereby realizing laser pumping protection function.
Drawings
Fig. 1 is a circuit configuration diagram of a circuit structure for realizing current protection of a multi-pump laser according to the present utility model.
Fig. 2a is a circuit diagram of the 1 st pumping circuit of the circuit structure for realizing the current protection of the multi-pumping laser according to the present utility model.
Fig. 2b is a circuit diagram of the 2 nd pumping circuit of the circuit structure for realizing current protection of the multi-pumping laser according to the present utility model.
Fig. 2c is a circuit diagram of an nth pumping circuit of the circuit structure for implementing current protection of a multiple pumping laser according to the present utility model.
Detailed Description
In order to more clearly describe the technical contents of the present utility model, a further description will be made below in connection with specific embodiments.
The circuit structure for realizing the current protection of the multi-path pumping laser comprises N paths of pumping circuits, wherein N is more than or equal to 1, the circuit structure also comprises N MOS tubes which are respectively positioned in the N paths of pumping circuits, the drain electrode of the N MOS tube is connected with DAC signals input from the outside in the N paths of pumping circuits, the source electrode of the N MOS tube is grounded, and the grid electrode of the N MOS tube is connected with the grid electrode of the N-1 MOS tube;
the circuit structure also comprises an N-1 comparator and an adder, wherein the N-1 comparator is respectively connected with the grid electrode of the N-1 MOS tube and the grid electrode of the N MOS tube, the N-1 comparator is connected with the N-1 adder, and the N-1 adder is also respectively connected with the N-1 pumping circuit and the pumping current output end of the N pumping circuit.
As a preferred embodiment of the utility model, each pump circuit comprises a current adjusting operational amplifier module, a current sampling amplifying operational amplifier module, a DC-DC module, a current sampling resistor module and a pump laser luminous tube, wherein the input end of the current adjusting operational amplifier module is connected with DAC signals input from the outside, the current sampling amplifying operational amplifier module and the DC-DC module are both connected with the current adjusting operational amplifier module, the other two ports of the current sampling amplifying operational amplifier module are respectively connected with two ends of the current sampling resistor module, the DC-DC module is connected with the current sampling resistor module, the positive electrode of the pump laser luminous tube is connected with the current sampling resistor module, and the negative electrode of the pump laser luminous tube is grounded.
As a preferred embodiment of the utility model, the N-1 adder is also respectively connected with the current sampling amplifying operational amplifier module of the N-1 pump circuit and the current sampling amplifying operational amplifier module of the N pump circuit.
As the preferred implementation mode of the utility model, the N-th pumping circuit also comprises a bias resistor, one end of the bias resistor is connected with an externally input DAC signal, and the other end of the bias resistor is connected with the current regulating operational amplifier module and the drain electrode of the N-th MOS tube.
In a preferred embodiment of the present utility model, the magnitude of the current output of the pump laser light emitting tube is controlled by a DAC signal input from the outside.
As a preferred embodiment of the utility model, the current regulation operational amplifier module controls the FB feedback pin of the DC-DC module according to the DAC value and the current sampling amplification operational amplifier value which are input externally.
In the specific implementation mode of the utility model, the problem that the working circuit of the laser generator is closed to enable when the laser generator generates over-power output no matter the laser generating circuit is caused by software abnormality or hardware abnormality is effectively solved by a circuit design scheme.
FIG. 1 is a circuit architecture diagram of the utility model; fig. 1 shows a novel application mode, namely a multi-pump output mode, in a laser generating circuit. Fig. 2 is a circuit diagram showing the whole circuit of the current protection circuit of the multiple pump laser.
The multi-channel pumping current protection circuit can realize the protection function of N-channel pumping, and N is more than or equal to 1.
The output size of the pumping current is controlled by the front-stage DAC, and meanwhile, the DAC finally outputs to the current regulating operational amplifier and is controlled by the MOS tube.
The DAC value input from the outside and the current sampling amplifying operational amplifier control the FB feedback pin of the DC-DC under the dual function of the current adjusting operational amplifier, so as to control the true output current of the pump.
The output energy of the pump is derived from the conversion effect of DC-DC, and meanwhile, the output mode of the DC-DC output module is a constant current mode, and the constant current driving of the pump laser luminotron is realized through the feedback effect of current.
The pumping current generates sampling voltage on the sampling resistor, and the sampling voltage is fed back to the current sampling amplifying operational amplifier circuit to realize the signal conversion of current and voltage.
The principle of operation of the multiplex pump is identical to that described above, due to the multiplex pump mode.
The final effect of the multi-way pumping is that the sum of the output power of the multi-way pumping cannot exceed the fixed power output requirement, so that the sum of the multi-way pumping currents is obtained after the current of the multi-way pumping passes through the adder and is compared with the comparator, when the sum is larger than the set current value, the comparator outputs high level to conduct the MOS tube, the output of the pumping current is cut off, and the safety protection effect of the pumping current is further realized.
The specific implementation manner of this embodiment may be referred to the related description in the foregoing embodiment, which is not repeated herein.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
It should be noted that in the description of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "plurality" means at least two.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
By adopting the circuit structure for realizing the current protection of the multi-pump laser, the multi-pump can output high-power laser without high-power pump, and meanwhile, the problem of too short service life of the laser caused by loss and aging of the pump is avoided. When single pump failure occurs, the laser module can be operated by another pump, so that the phenomenon that the laser module is directly failed to cause no operation is avoided, and the reliability and low failure property of the laser module are improved. The multipath pumping can realize interval switching work and prolong the service life of the pumping body, and finally the whole service life of the laser module is prolonged. The current protection circuit can restrain total current output of double pumping on the premise of overlarge input of an external DAC, and realize hardware limiting function of pumping current, thereby realizing laser pumping protection function.
In this specification, the utility model has been described with reference to specific embodiments thereof. It will be apparent, however, that various modifications and changes may be made without departing from the spirit and scope of the utility model. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (6)
1. The circuit structure is characterized by comprising N paths of pumping circuits, wherein N is more than or equal to 1, N MOS (metal oxide semiconductor) tubes are respectively arranged in the N paths of pumping circuits, the drain electrodes of the N MOS tubes are connected with DAC (digital-to-analog converter) signals input from the outside in the N paths of pumping circuits, the source electrodes of the N MOS tubes are grounded, and the grid electrodes of the N MOS tubes are connected with the grid electrodes of the N-1 MOS tubes;
the circuit structure also comprises an N-1 comparator and an adder, wherein the N-1 comparator is respectively connected with the grid electrode of the N-1 MOS tube and the grid electrode of the N MOS tube, the N-1 comparator is connected with the N-1 adder, and the N-1 adder is also respectively connected with the N-1 pumping circuit and the pumping current output end of the N pumping circuit.
2. The circuit structure for realizing the current protection of the multipath pumping laser according to claim 1, wherein each pumping circuit comprises a current adjusting operational amplifier module, a current sampling amplifying operational amplifier module, a DC-DC module, a current sampling resistor module and a pumping laser luminous tube, the input end of the current adjusting operational amplifier module is connected with DAC signals input from the outside, the current sampling amplifying operational amplifier module and the DC-DC module are connected with the current adjusting operational amplifier module, the other two ports of the current sampling amplifying operational amplifier module are respectively connected with two ends of the current sampling resistor module, the DC-DC module is connected with the current sampling resistor module, the anode of the pumping laser luminous tube is connected with the current sampling resistor module, and the cathode of the pumping laser luminous tube is grounded.
3. The circuit structure for realizing current protection of multi-pump laser according to claim 2, wherein the N-1 adder is further connected to the current sampling amplifying operation amplifier module of the N-1 pump circuit and the current sampling amplifying operation amplifier module of the N pump circuit, respectively.
4. The circuit structure for realizing the current protection of the multi-pump laser according to claim 2, wherein the nth pump circuit further comprises a bias resistor, one end of the bias resistor is connected with a DAC signal input from the outside, and the other end of the bias resistor is connected with the current adjusting operational amplifier module and the drain electrode of the nth MOS tube.
5. The circuit structure for realizing current protection of the multiple pumping lasers according to claim 2, wherein the current output of the pumping laser luminous tube is controlled by a DAC signal input from outside.
6. The circuit structure for realizing current protection of the multi-pump laser according to claim 2, wherein the current adjusting operational amplifier module controls the FB feedback pin of the DC-DC module according to the DAC value and the current sampling amplifying operational amplifier value inputted from the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322132353.4U CN220510454U (en) | 2023-08-09 | 2023-08-09 | Circuit structure for realizing current protection of multi-channel pumping laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322132353.4U CN220510454U (en) | 2023-08-09 | 2023-08-09 | Circuit structure for realizing current protection of multi-channel pumping laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220510454U true CN220510454U (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322132353.4U Active CN220510454U (en) | 2023-08-09 | 2023-08-09 | Circuit structure for realizing current protection of multi-channel pumping laser |
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| Country | Link |
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| CN (1) | CN220510454U (en) |
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2023
- 2023-08-09 CN CN202322132353.4U patent/CN220510454U/en active Active
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