Laser energy real-time feedback device

Abstract

The utility model provides a laser energy real-time feedback device, which comprises a power supply VDD, a chip U1, a laser emitter and a power detection circuit, the chip U1 is connected with the positive electrode of the power supply VDD, the negative electrode of the power supply VDD is grounded, the power detection circuit is respectively connected with the positive electrode of the power supply VDD and the chip U1, the laser emitter is in communication connection with the chip U1, and the power detection circuit is connected with the chip U1. When the laser transmitter transmits laser, the power detection circuit can detect the actual power of the laser transmitted by the laser transmitter in real time and feed back the actual power to the chip U1 in real time, so that the detected laser power can be fed back in real time, and the technical effects of detecting and feeding back the output power in real time are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a laser energy real-time feedback device. Background Art

[0002] The change of the working temperature of the laser transmitter may lead to the instability of the output power, that is, the change of temperature will affect the threshold current and slope efficiency of the laser transmitter, and then affect the output power, so that there is an error between the actual output power of the laser transmitter and the set power parameter. However, the prior art lacks a device for detecting and feeding back the actual output power of the laser transmitter.

[0003] That is, how to provide a real-time feedback device for laser energy to achieve the technical effect of real-time detection and feedback of output power is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0004] In view of the above-mentioned problems, the present invention aims to provide a laser energy real-time feedback device to at least solve at least one of the above-mentioned technical problems.

[0005] In order to at least solve the above technical problems, the utility model provides a laser energy real-time feedback device, the device comprising:

[0006] A power supply VDD, wherein a negative electrode of the power supply VDD is grounded;

[0007] A chip U1, wherein the chip U1 is connected to the positive electrode of the power supply VDD;

[0008] A laser transmitter, the laser transmitter is communicatively connected to the chip U1;

[0009] A power detection circuit is connected to the positive electrode of the power supply VDD and the chip U1 respectively, and is used to detect the power of the laser emitted by the laser transmitter.

[0010] Preferably, the power detection circuit comprises:

[0011] A photodiode, wherein the positive electrode of the photodiode is grounded;

[0012] An operational amplifier U2, wherein a negative input terminal of the operational amplifier U2 is connected to a cathode of the photodiode, a positive power supply VDD terminal of the operational amplifier U2 is connected to the power supply VDD, a negative power supply VDD terminal of the operational amplifier U2 is grounded, and an output terminal of the operational amplifier U2 is connected to the chip U1;

[0013] An adjustable resistor W1, one end of which is connected to the cathode of the photodiode;

[0014] A first fixed resistor R1, one end of the first fixed resistor R1 is connected to the other end of the adjustable resistor W1, and the other end of the first fixed resistor R1 is connected to the output end of the operational amplifier U2;

[0015] A second fixed resistor R2, one end of the second fixed resistor R2 is connected to the positive input terminal of the operational amplifier U2, and the other end of the second fixed resistor R2 is grounded;

[0016] A first capacitor C1, one end of the first capacitor C1 is connected to one end of the adjustable resistor W1, and the other end of the first capacitor C1 is connected to the output end of the operational amplifier U2.

[0017] Preferably, the power detection circuit further includes:

[0018] A third fixed resistor R3, one end of the third fixed resistor R3 is connected to the negative input end of the operational amplifier U2, and the other end of the third fixed resistor R3 is respectively connected to the cathode of the photodiode and one end of the adjustable resistor W1.

[0019] Preferably, the power detection circuit further includes:

[0020] A fourth fixed resistor R4, one end of the fourth fixed resistor R4 is connected to the output end of the operational amplifier U2, and the other end of the fourth fixed resistor R4 is connected to the chip U1.

[0021] Preferably, the power detection circuit further includes:

[0022] A second capacitor C2, one end of the second capacitor C2 is connected to the positive electrode of the power supply VDD, and the other end of the second capacitor C2 is grounded.

[0023] Preferably, the supply voltage of the power supply VDD is 5V.

[0024] Preferably, the model of the chip U1 is: STC8G1K08.

[0025] Preferably, the model of the operational amplifier U2 is: LM8261.

[0026] Beneficial effects:

[0027] The utility model provides a laser energy real-time feedback device, which includes a power supply VDD, a chip U1, a laser transmitter and a power detection circuit, wherein the chip U1 is connected to the positive pole of the power supply VDD, the negative pole of the power supply VDD is grounded, the power detection circuit is respectively connected to the positive pole of the power supply VDD and the chip U1, so as to power the chip U1 and the power detection circuit through the power supply VDD, the laser transmitter is communicatively connected to the chip U1, so as to realize data transmission between the chip U1 and the laser transmitter, the power detection circuit can be set at the far end of the laser transmitter, when the laser transmitter emits laser, the power detection circuit can detect the actual power of the laser emitted by the laser transmitter in real time, and feed back the actual power to the chip U1 in real time, so as to help judge the deviation between the actually detected laser power and the preset laser output power, and help to adjust and correct the power parameters of the laser transmitter based on the deviation.

[0028] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a schematic diagram of the circuit structure of the power detection circuit provided in Example 1. DETAILED DESCRIPTION

[0031] The following will combine the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this utility model; the "and / or" keyword involved in this implementation represents both and, or. In other words, A and / or B mentioned in the embodiments of this specification represent both A and B, and A or B, and describe the three states of A and B. For example, A and / or B means: only A is included but not B; only B is included but not A; A and B are included.

[0032] Meanwhile, in the embodiments of this specification, when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time.

[0033] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0034] Embodiment 1

[0035] See also Figure 1 This embodiment 1 provides a laser energy real-time feedback device, which includes a power supply VDD, a chip U1, a laser emitter and a power detection circuit. The negative pole of the power supply VDD is grounded; the chip U1 is connected to the positive pole of the power supply VDD; the laser emitter is communicatively connected to the chip U1; the power detection circuit is respectively connected to the positive pole of the power supply VDD and the chip U1, and is used to detect the power of the laser emitted by the laser emitter.

[0036] The utility model provides a laser energy real-time feedback device, which includes a power supply VDD, a chip U1, a laser transmitter and a power detection circuit, wherein the chip U1 is connected to the positive pole of the power supply VDD, the negative pole of the power supply VDD is grounded, the power detection circuit is respectively connected to the positive pole of the power supply VDD and the chip U1, so as to power the chip U1 and the power detection circuit through the power supply VDD, the laser transmitter is communicatively connected to the chip U1, so as to realize data transmission between the chip U1 and the laser transmitter, the power detection circuit can be set at the far end of the laser transmitter, when the laser transmitter emits laser, the power detection circuit can detect the actual power of the laser emitted by the laser transmitter in real time, and feed back the actual power to the chip U1 in real time, so as to help judge the deviation between the actually detected laser power and the preset laser output power, and help to adjust and correct the power parameters of the laser transmitter based on the deviation.

[0037] In a possible implementation manner, the supply voltage of the power supply VDD is 5V.

[0038] In a possible implementation manner, the model of the chip U1 is: STC8G1K08.

[0039] In a possible implementation, the power detection circuit includes a photodiode, an operational amplifier U2, an adjustable resistor W1, a first fixed resistor R1, a second fixed resistor R2 and a first capacitor C1, the positive electrode of the photodiode is grounded; the negative input terminal of the operational amplifier U2 is connected to the negative electrode of the photodiode, the positive power supply VDD terminal of the operational amplifier U2 is connected to the power supply VDD, the negative power supply VDD terminal of the operational amplifier U2 is grounded, and the output terminal of the operational amplifier U2 is connected to the chip U1; one end of the adjustable resistor W1 is connected to the negative electrode of the photodiode; one end of the first fixed resistor R1 is connected to the other end of the adjustable resistor W1, and the other end of the first fixed resistor R1 is connected to the output terminal of the operational amplifier U2; one end of the second fixed resistor R2 is connected to the positive input terminal of the operational amplifier U2, and the other end of the second fixed resistor R2 is grounded; one end of the first capacitor C1 is connected to one end of the adjustable resistor W1, and the other end of the first capacitor C1 is connected to the output terminal of the operational amplifier U2.

[0040] In a possible implementation manner, the operational amplifier U2 has a model of LM8261.

[0041] Specifically, the laser signal emitted by the laser transmitter is converted into an electrical signal through a photodiode, and then the operational amplifier U2 performs signal amplification processing on the electrical signal and feeds the signal back to the chip U1. An adjustable resistor W1 and a first fixed resistor R1 are set between the negative input terminal and the output terminal of the operational amplifier U2, so that the resistance value of the feedback resistor can be changed by adjusting the size of the adjustable resistor W1, thereby adjusting the amplification factor and the gain; a second fixed resistor R2 is set at the positive input terminal of the operational amplifier U2 and grounded, so that the offset voltage caused by the bias current can be reduced by the second fixed resistor R2 and the stability of the circuit can be improved; a first capacitor C1 is set between the negative input terminal and the output terminal of the operational amplifier U2, so that high-frequency interference signals can be filtered out by the first capacitor C1 to prevent affecting the output circuit, and frequency compensation is performed at the same time to improve the stability of the circuit operation.

[0042] In a possible implementation, the power detection circuit also includes a third fixed resistor R3, one end of the third fixed resistor R3 is connected to the negative input terminal of the operational amplifier U2, and the other end of the third fixed resistor R3 is respectively connected to the negative electrode of the photodiode and one end of the adjustable resistor W1.

[0043] The third fixed resistor R3 is provided at the input end of the operational amplifier U2 to limit the input current, thereby preventing the operational amplifier U2 from being affected by excessive current and ensuring correct signal transmission.

[0044] In a possible implementation manner, the power detection circuit further includes a fourth fixed resistor R4, one end of the fourth fixed resistor R4 is connected to the output end of the operational amplifier U2, and the other end of the fourth fixed resistor R4 is connected to the chip U1.

[0045] By setting a fourth fixed resistor R4 at the output end of the operational amplifier U2 to limit the output current and avoid excessive current flowing into the chip U1, the chip U1 is protected. The fourth fixed resistor R4 can also be used for impedance matching to improve the efficiency and quality of signal transmission.

[0046] In a possible implementation, the power detection circuit further includes a second capacitor C2, one end of the second capacitor C2 is connected to the positive electrode of the power supply VDD, and the other end of the second capacitor C2 is grounded, so that the power supply VDD is filtered through the second capacitor C2, thereby suppressing interference signals.

[0047] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of the present specification are only used to match the contents disclosed in the specification for people familiar with the technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present utility model, should still fall within the scope of the technical contents disclosed by the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in the present specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present utility model. The change or adjustment of the relative relationship, without substantial change of the technical contents, should also be regarded as the scope of the implementation of the present utility model.

[0048] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A laser energy real-time feedback device, characterized in that: The device comprises: A power supply VDD, wherein a negative electrode of the power supply VDD is grounded; A chip U1, wherein the chip U1 is connected to the positive electrode of the power supply VDD; A laser transmitter, the laser transmitter is communicatively connected to the chip U1; A power detection circuit is connected to the positive electrode of the power supply VDD and the chip U1 respectively, and is used to detect the power of the laser emitted by the laser transmitter.

2. The laser energy real-time feedback device according to claim 1, characterized in that: The power detection circuit comprises: A photodiode, wherein the positive electrode of the photodiode is grounded; An operational amplifier U2, wherein a negative input terminal of the operational amplifier U2 is connected to a cathode of the photodiode, a positive power supply VDD terminal of the operational amplifier U2 is connected to the power supply VDD, a negative power supply VDD terminal of the operational amplifier U2 is grounded, and an output terminal of the operational amplifier U2 is connected to the chip U1; An adjustable resistor W1, one end of which is connected to the cathode of the photodiode; A first fixed resistor R1, one end of the first fixed resistor R1 is connected to the other end of the adjustable resistor W1, and the other end of the first fixed resistor R1 is connected to the output end of the operational amplifier U2; A second fixed resistor R2, one end of the second fixed resistor R2 is connected to the positive input terminal of the operational amplifier U2, and the other end of the second fixed resistor R2 is grounded; A first capacitor C1 , one end of the first capacitor C1 is connected to one end of the adjustable resistor W1 , and the other end of the first capacitor C1 is connected to the output end of the operational amplifier U2 .

3. The laser energy real-time feedback device according to claim 2, characterized in that: The power detection circuit also includes: A third fixed resistor R3, one end of the third fixed resistor R3 is connected to the negative input end of the operational amplifier U2, and the other end of the third fixed resistor R3 is respectively connected to the cathode of the photodiode and one end of the adjustable resistor W1.

4. The laser energy real-time feedback device according to claim 3, characterized in that: The power detection circuit also includes: A fourth fixed resistor R4, one end of the fourth fixed resistor R4 is connected to the output end of the operational amplifier U2, and the other end of the fourth fixed resistor R4 is connected to the chip U1.

5. The laser energy real-time feedback device according to claim 4, characterized in that: The power detection circuit also includes: A second capacitor C2, one end of the second capacitor C2 is connected to the positive electrode of the power supply VDD, and the other end of the second capacitor C2 is grounded.

6. The laser energy real-time feedback device according to claim 5, characterized in that: The supply voltage of the power supply VDD is 5V.

7. The laser energy real-time feedback device according to claim 6, characterized in that: The model of the chip U1 is: STC8G1K08.

8. The laser energy real-time feedback device according to claim 7, characterized in that: The model of the operational amplifier U2 is: LM8261.

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