Optical power detection device and electronic equipment

Abstract

The utility model relates to the technical field of photoelectricity, and provides an optical power detection device and electronic equipment. The optical power detection device comprises a photoelectric conversion module, a pre-stage amplification module, a post-stage amplification module and an analog-to-digital converter which are electrically connected in sequence, wherein the analog-to-digital converter is in communication connection with a controller; the photoelectric conversion module is used for converting the received laser signal into an electric signal; the pre-amplification module is used for amplifying the electric signal and outputting a first signal; the post-stage amplification module is used for amplifying the first signal, adjusting the amplified signal to a signal acquisition range of the analog-to-digital converter and outputting a second signal; the analog-to-digital converter is used for performing analog-to-digital conversion on the second signal and outputting the converted signal; and the controller is used for determining the optical power of the laser signal according to the converted signal. Therefore, the detection precision of the optical power is improved.

Description

Optical power detection device and electronic equipment Technical Field

[0001] This utility model relates to the field of optoelectronic technology, and more specifically, to an optical power detection device and an electronic device. Background Technology

[0002] With the rapid development of laser technology, it has become one of the important pillars of modern science and technology. Lasers, with their unique advantages such as high directionality, high monochromaticity, and high coherence, have been widely used in many fields, including semiconductors and medicine. As application scenarios continue to expand, the requirements for laser performance are also increasing, with precise control of optical power becoming a key factor in ensuring the effective operation of lasers. Therefore, the detection of laser optical power has become an indispensable and important part of laser technology applications. Summary of the Invention

[0003] The purpose of this invention is to provide an optical power detection device and electronic equipment to improve the detection accuracy of optical power of laser signals.

[0004] The embodiments of this utility model are implemented as follows:

[0005] In a first aspect, this utility model provides an optical power detection device, comprising a photoelectric conversion module, a pre-amplifier module, a post-amplifier module, and an analog-to-digital converter connected in sequence, wherein the analog-to-digital converter is communicatively connected to a controller;

[0006] The photoelectric conversion module is used to convert the received laser signal into an electrical signal;

[0007] The preamplifier module is used to amplify the electrical signal and output a first signal;

[0008] The post-amplification module is used to amplify the first signal, adjust the amplified signal to the signal acquisition range of the analog-to-digital converter, and output the second signal.

[0009] The analog-to-digital converter is used to perform analog-to-digital conversion on the second signal and output the converted signal;

[0010] The controller is used to determine the optical power of the laser signal based on the converted signal.

[0011] In an optional implementation, the preamplifier module includes a first resistor, a second resistor, a first operational amplifier, and a correction module;

[0012] One end of the first resistor is electrically connected to the inverting input terminal of the first operational amplifier, and the other end of the first resistor is electrically connected to the output terminal of the first operational amplifier.

[0013] One end of the second resistor is electrically connected to the non-inverting input of the first operational amplifier, and the other end of the second resistor is grounded;

[0014] The positive power supply terminal of the first operational amplifier is electrically connected to the positive terminal of the power supply, and the negative power supply terminal of the first operational amplifier is electrically connected to the negative terminal of the power supply.

[0015] The first end of the correction module is electrically connected to the first adjustment end of the first operational amplifier, the second end of the correction module is electrically connected to the second adjustment end of the first operational amplifier, and the third end of the correction module is electrically connected to the positive power supply terminal of the first operational amplifier and the positive terminal of the power supply.

[0016] The photoelectric conversion module is electrically connected to the inverting input terminal of the first operational amplifier;

[0017] The subsequent amplification module is electrically connected to the output terminal of the first operational amplifier.

[0018] The correction module is used to drive the output voltage of the first operational amplifier to zero when the first operational amplifier is in a non-operating state.

[0019] In an optional implementation, the calibration module includes a third resistor, a fourth resistor, and a potentiometer;

[0020] The first fixed terminal of the potentiometer is electrically connected to one end of the third resistor, and the other end of the third resistor is electrically connected to the first adjustment terminal of the first operational amplifier.

[0021] The second fixed terminal of the potentiometer is electrically connected to one end of the fourth resistor, and the other end of the fourth resistor is electrically connected to the second adjustment terminal of the first operational amplifier.

[0022] The sliding terminal of the potentiometer is electrically connected to the positive power supply terminal of the first operational amplifier and the positive terminal of the power supply.

[0023] In an optional embodiment, the preamplifier module further includes a first capacitor, one end of which is electrically connected to the inverting input terminal of the first operational amplifier, and the other end of which is electrically connected to the output terminal of the first operational amplifier.

[0024] In an optional implementation, the preamplifier module further includes a fifth resistor; the output of the first operational amplifier is electrically connected to the postamplifier module through the fifth resistor.

[0025] In an optional implementation, the preamplifier module further includes a second capacitor and a sixth resistor;

[0026] The negative power supply terminal of the first operational amplifier is grounded through the second capacitor, and the negative power supply terminal of the first operational amplifier is electrically connected to the negative terminal of the power supply through the sixth resistor.

[0027] In an optional implementation, the post-amplification module includes a second operational amplifier, an eighth resistor, a ninth resistor, and an adjustment module;

[0028] One end of the eighth resistor is electrically connected to the non-inverting input of the second operational amplifier, and the other end of the eighth resistor is grounded.

[0029] One end of the ninth resistor is electrically connected to the inverting input terminal of the second operational amplifier, and the other end of the ninth resistor is electrically connected to the output terminal of the second operational amplifier.

[0030] The first terminal of the adjustment module is electrically connected to the non-inverting input terminal of the second operational amplifier, the second terminal of the adjustment module is electrically connected to the output terminal of the second operational amplifier, and the third terminal of the adjustment module is electrically connected to the analog-to-digital converter.

[0031] The adjustment module is used to adjust the signal output by the second operational amplifier to the signal acquisition range of the analog-to-digital converter and output a second signal.

[0032] In an optional implementation, the adjustment module includes a tenth resistor and an eleventh resistor;

[0033] One end of the tenth resistor is electrically connected to the non-inverting input of the second operational amplifier, and the other end of the tenth resistor is electrically connected to the analog-to-digital converter.

[0034] One end of the eleventh resistor is electrically connected to the output terminal of the second operational amplifier, and the other end of the eleventh resistor is electrically connected to the analog-to-digital converter.

[0035] In an optional embodiment, the wavelength range of the laser signal received by the photoelectric conversion module is 200nm to 1000nm.

[0036] Secondly, this utility model provides an electronic device, including the optical power detection device described in any of the foregoing embodiments.

[0037] This invention provides an optical power detection device and electronic device. The optical power detection device includes a photoelectric conversion module, a pre-amplifier module, a post-amplifier module, and an analog-to-digital converter (ADC) connected in sequence. The ADC is communicatively connected to a controller. The photoelectric conversion module converts the received laser signal into an electrical signal. The pre-amplifier module amplifies the electrical signal and outputs a first signal. The post-amplifier module amplifies the first signal, adjusts the amplified signal to the signal acquisition range of the ADC, and outputs a second signal. The ADC performs analog-to-digital conversion on the second signal and outputs the converted signal. The controller determines the optical power of the laser signal based on the converted signal. This invention improves the accuracy of optical power detection by cascading two amplification modules to amplify the electrical signal converted from the laser signal through multiple stages and adjusting the amplified signal to the signal acquisition range of the ADC. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 is one of the circuit connection diagrams of the optical power detection device provided in the embodiment of this utility model;

[0040] Figure 2 is a second schematic diagram of the circuit connection of the optical power detection device provided in the embodiment of this utility model;

[0041] Figure 3 is a third schematic diagram of the circuit connection of the optical power detection device provided in the embodiment of this utility model;

[0042] Figure 4 is a fourth schematic diagram of the circuit connection of the optical power detection device provided in the embodiment of this utility model.

[0043] Icons: 110 - Photoelectric conversion module; 120 - Preamplifier module; 130 - Power amplifier module; 140 - Analog-to-digital converter; 150 - Controller; R1 - First resistor; R2 - Second resistor; R3 - Third resistor; R4 - Fourth resistor; R5 - Fifth resistor; R6 - Sixth resistor; R8 - Eighth resistor; R9 - Ninth resistor; R10 - Tenth resistor; R11 - Eleventh resistor; PR - Potentiometer; C1 - First capacitor; C2 - Second capacitor. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0046] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0047] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0049] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] Please refer to Figure 1, which is a circuit connection diagram of an optical power detection device provided in an embodiment of this utility model. The optical power detection device includes a photoelectric conversion module 110, a pre-amplifier module 120, a post-amplifier module 130, an analog-to-digital converter 140, and a controller 150. The photoelectric conversion module 110 is electrically connected to the pre-amplifier module 120, the pre-amplifier module 120 is electrically connected to the post-amplifier module 130, and the post-amplifier module 130 is electrically connected to the analog-to-digital converter 140. The analog-to-digital converter 140 is communicatively connected to the controller 150 via SPI (Serial Peripheral Interface).

[0051] The photoelectric conversion module 110 can be a photodiode (PD), which can convert laser signals with wavelengths in the range of 200nm to 1000nm into electrical signals. The analog-to-digital converter (ADC) 140 can be a 16-bit multi-channel ADC chip such as the AD5541, and the external reference voltage of the ADC 140 can be set to 2.5V. The controller 150 can be an embedded microcontroller such as the STM32. Furthermore, the laser signal is an optical signal emitted by a laser, which can be an ion gas laser, an atomic gas laser, a molecular gas laser, or an excimer laser; this embodiment of the invention is not limited to this type.

[0052] In this embodiment, the photoelectric conversion module 110 is used to convert the received laser signal into an electrical signal; the preamplifier module 120 is used to amplify the electrical signal and output a first signal; the postamplifier module 130 is used to amplify the first signal, adjust the amplified signal to the signal acquisition range of the analog-to-digital converter 140, and output a second signal; the analog-to-digital converter 140 is used to perform analog-to-digital conversion on the second signal and output the converted signal; the controller 150 is used to determine the optical power of the laser signal based on the converted signal.

[0053] It can be understood that the optical power detection device provided in this embodiment of the present invention amplifies the electrical signal converted from the laser signal through multiple stages by cascading two amplification modules, and adjusts the amplified signal to the signal acquisition range of the analog-to-digital converter 140, so as to improve the accuracy of signal acquisition and thus improve the detection accuracy of optical power.

[0054] Please refer to Figure 2, which is a schematic diagram of another circuit connection of the optical power detection device provided in this embodiment of the present invention. The preamplifier module 120 in the optical power detection device includes a first resistor R1, a second resistor R2, a first operational amplifier, and a correction module. The first operational amplifier can be a precision operational amplifier such as an OP27. Furthermore, the positive terminal of the power supply for the first operational amplifier can provide a voltage of +5V, and the negative terminal can provide a voltage of -5V.

[0055] Furthermore, one end of the first resistor R1 is electrically connected to the inverting input terminal of the first operational amplifier, and the other end of the first resistor R1 is electrically connected to the output terminal of the first operational amplifier. One end of the second resistor R2 is electrically connected to the non-inverting input terminal of the first operational amplifier, and the other end of the second resistor R2 is grounded. The positive power supply terminal of the first operational amplifier is electrically connected to the positive terminal of the power supply, and the negative power supply terminal of the first operational amplifier is electrically connected to the negative terminal of the power supply.

[0056] The first terminal of the calibration module is electrically connected to the first adjustment terminal of the first operational amplifier, the second terminal of the calibration module is electrically connected to the second adjustment terminal of the first operational amplifier, and the third terminal of the calibration module is electrically connected to the positive power supply terminal of the first operational amplifier and the positive terminal of the power supply. This calibration module is used to drive the output voltage of the first operational amplifier to zero when the first operational amplifier is in a non-operating state.

[0057] The photoelectric conversion module 110 is electrically connected to the inverting input terminal of the first operational amplifier. The subsequent amplification module 130 is electrically connected to the output terminal of the first operational amplifier.

[0058] In this embodiment, the first resistor R1 and the second resistor R2 are the gain resistors of the first operational amplifier, which amplifies the electrical signal through these two resistors. Furthermore, this embodiment also employs a calibration module to drive the output voltage of the first operational amplifier to zero when the first operational amplifier is not in operation. This ensures that the signal at the output of the first operational amplifier is the amplified signal when it is in operation, thereby reducing noise interference and improving the measurement accuracy of optical power.

[0059] Please refer to Figure 2. The correction module in the preamplifier module 120 includes a third resistor R3, a fourth resistor R4, and a potentiometer PR. The first fixed terminal of the potentiometer PR is electrically connected to one end of the third resistor R3, and the other end of the third resistor R3 is electrically connected to the first adjustment terminal of the first operational amplifier. The second fixed terminal of the potentiometer PR is electrically connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is electrically connected to the second adjustment terminal of the first operational amplifier. The sliding terminal of the potentiometer PR is electrically connected to the positive power supply terminal of the first operational amplifier and the positive terminal of the power supply.

[0060] In this embodiment, by adjusting the sliding contact of potentiometer PR in conjunction with the third resistor R3 and the fourth resistor R4, the voltages at the non-inverting and inverting input terminals can be adjusted to make them equal when the first operational amplifier is in a non-operating state. That is, by additionally compensating the input voltage, the offset voltage is offset, thereby ensuring that the output voltage of the first operational amplifier is zero when it is in a non-operating state. In other words, potentiometer PR allows for flexible adjustment of the first operational amplifier, making it suitable for various scenarios.

[0061] Please refer to Figure 3, which is another circuit connection diagram of the optical power detection device provided in this embodiment of the present invention. The preamplifier module 120 also includes a first capacitor C1, a fifth resistor R5, a second capacitor C2, and a sixth resistor R6.

[0062] In this configuration, one end of the first capacitor C1 is electrically connected to the inverting input terminal of the first operational amplifier, and the other end of the first capacitor C1 is electrically connected to the output terminal of the first operational amplifier. This can be understood as using the first capacitor C1 in conjunction with the first resistor R1 to set a cutoff frequency for signal filtering, thereby reducing noise interference and improving signal quality.

[0063] Furthermore, the output of the first operational amplifier is electrically connected to the subsequent amplifier module 130 via the fifth resistor R5. It can be understood that directly connecting the two operational amplifiers could lead to signal distortion and easily damage the subsequent operational amplifier. Therefore, this embodiment of the invention uses the fifth resistor R5 to achieve an indirect connection between the two operational amplifiers, thereby avoiding signal distortion and protecting the subsequent operational amplifier.

[0064] Furthermore, the negative power supply terminal of the first operational amplifier is grounded through the second capacitor C2, and is electrically connected to the negative terminal of the power supply through the sixth resistor R6. This can be understood as the second capacitor C2 acting as a decoupling capacitor for the negative power supply terminal of the first operational amplifier, and together with the sixth resistor R6, providing a stable power supply voltage to the first operational amplifier, thereby improving its stability and consequently enhancing the stability of the optical power detection device.

[0065] Please refer to Figure 4, which is a circuit connection diagram of an optical power detection device provided in an embodiment of this utility model. The post-amplification module 130 in this optical power detection device includes a second operational amplifier, an eighth resistor R8, a ninth resistor R9, and an adjustment module. The second operational amplifier can be a double-precision operational amplifier such as the LT1013. Furthermore, the positive terminal of the power supply for the second operational amplifier can provide a voltage of +5V, and the negative terminal can provide a voltage of -5V.

[0066] Furthermore, one end of the eighth resistor R8 is electrically connected to the non-inverting input of the second operational amplifier, and the other end of the eighth resistor R8 is grounded. One end of the ninth resistor R9 is electrically connected to the inverting input of the second operational amplifier, and the other end of the ninth resistor R9 is electrically connected to the output of the second operational amplifier.

[0067] The first terminal of the adjustment module is electrically connected to the non-inverting input terminal of the second operational amplifier, the second terminal of the adjustment module is electrically connected to the output terminal of the second operational amplifier, and the third terminal of the adjustment module is electrically connected to the analog-to-digital converter 140. This adjustment module is used to adjust the signal output from the second operational amplifier to the signal acquisition range of the analog-to-digital converter 140 and output a second signal.

[0068] In this embodiment, the eighth resistor R8 and the ninth resistor R9 are the gain resistors of the second operational amplifier, and the first operational amplifier amplifies the electrical signal through these two resistors. Furthermore, this embodiment also employs an adjustment module to adjust the signal output by the second operational amplifier to match the signal acquisition range of the analog-to-digital converter 140, thereby improving the accuracy of the signal acquired by the analog-to-digital converter 140 and consequently improving the measurement accuracy of optical power.

[0069] Please refer to Figure 4. The adjustment module in the preamplifier module 120 includes a tenth resistor R10 and an eleventh resistor R11. One end of the tenth resistor R10 is electrically connected to the non-inverting input of the second operational amplifier, and the other end is electrically connected to the analog-to-digital converter 140. One end of the eleventh resistor R11 is electrically connected to the output of the second operational amplifier, and the other end is electrically connected to the analog-to-digital converter 140.

[0070] In this embodiment, the output voltage of the second operational amplifier can be adjusted to the voltage acquisition range of the analog-to-digital converter 140 by adjusting the resistance values ​​of the tenth resistor R10 and the eleventh resistor R11, thereby improving the accuracy of the signal acquisition by the analog-to-digital converter 140 and thus improving the measurement accuracy of optical power.

[0071] This utility model embodiment also provides an electronic device, which includes the optical power detection device provided in this utility model embodiment.

[0072] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An optical power detection device, characterized in that, The system includes a photoelectric conversion module, a pre-amplifier module, a post-amplifier module, and an analog-to-digital converter (ADC) connected in sequence. The ADC is communicatively connected to a controller. The photoelectric conversion module converts the received laser signal into an electrical signal. The pre-amplifier module amplifies the electrical signal and outputs a first signal. The post-amplifier module amplifies the first signal, adjusts the amplified signal to the signal acquisition range of the ADC, and outputs a second signal. The ADC performs analog-to-digital conversion on the second signal and outputs the converted signal. The controller determines the optical power of the laser signal based on the converted signal.

2. The optical power detection device according to claim 1, characterized in that, The preamplifier module includes a first resistor, a second resistor, a first operational amplifier, and a correction module. One end of the first resistor is electrically connected to the inverting input of the first operational amplifier, and the other end of the first resistor is electrically connected to the output of the first operational amplifier. One end of the second resistor is electrically connected to the non-inverting input of the first operational amplifier, and the other end of the second resistor is grounded. The positive power supply terminal of the first operational amplifier is electrically connected to the positive terminal of the power supply, and the negative power supply terminal of the first operational amplifier is electrically connected to the negative terminal of the power supply. The first terminal of the correction module is electrically connected to the first adjustment terminal of the first operational amplifier, the second terminal of the correction module is electrically connected to the second adjustment terminal of the first operational amplifier, and the third terminal of the correction module is electrically connected to both the positive power supply terminal of the first operational amplifier and the positive terminal of the power supply. The photoelectric conversion module is electrically connected to the inverting input of the first operational amplifier. The postamplifier module is electrically connected to the output of the first operational amplifier. The correction module is used to drive the output voltage of the first operational amplifier to zero when the first operational amplifier is in a non-operating state.

3. The optical power detection device according to claim 2, characterized in that, The calibration module includes a third resistor, a fourth resistor, and a potentiometer; the first fixed terminal of the potentiometer is electrically connected to one end of the third resistor, and the other end of the third resistor is electrically connected to the first adjustment terminal of the first operational amplifier; the second fixed terminal of the potentiometer is electrically connected to one end of the fourth resistor, and the other end of the fourth resistor is electrically connected to the second adjustment terminal of the first operational amplifier; the sliding terminal of the potentiometer is electrically connected to the positive power supply terminal of the first operational amplifier and the positive terminal of the power supply.

4. The optical power detection device according to claim 2, characterized in that, The preamplifier module further includes a first capacitor, one end of which is electrically connected to the inverting input terminal of the first operational amplifier, and the other end of which is electrically connected to the output terminal of the first operational amplifier.

5. The optical power detection device according to claim 2, characterized in that, The preamplifier module also includes a fifth resistor; the output of the first operational amplifier is electrically connected to the postamplifier module through the fifth resistor.

6. The optical power detection device according to claim 2, characterized in that, The preamplifier module further includes a second capacitor and a sixth resistor; the negative power supply terminal of the first operational amplifier is grounded through the second capacitor, and the negative power supply terminal of the first operational amplifier is electrically connected to the negative terminal of the power supply through the sixth resistor.

7. The optical power detection device according to any one of claims 1-6, characterized in that, The post-amplification module includes a second operational amplifier, an eighth resistor, a ninth resistor, and an adjustment module. One end of the eighth resistor is electrically connected to the non-inverting input of the second operational amplifier, and the other end of the eighth resistor is grounded. One end of the ninth resistor is electrically connected to the inverting input of the second operational amplifier, and the other end of the ninth resistor is electrically connected to the output of the second operational amplifier. The first end of the adjustment module is electrically connected to the non-inverting input of the second operational amplifier, the second end of the adjustment module is electrically connected to the output of the second operational amplifier, and the third end of the adjustment module is electrically connected to the analog-to-digital converter. The adjustment module is used to adjust the signal output by the second operational amplifier to the signal acquisition range of the analog-to-digital converter and output a second signal.

8. The optical power detection device according to claim 7, characterized in that, The adjustment module includes a tenth resistor and an eleventh resistor; one end of the tenth resistor is electrically connected to the non-inverting input terminal of the second operational amplifier, and the other end of the tenth resistor is electrically connected to the analog-to-digital converter; one end of the eleventh resistor is electrically connected to the output terminal of the second operational amplifier, and the other end of the eleventh resistor is electrically connected to the analog-to-digital converter.

9. The optical power detection device according to claim 1, characterized in that, The wavelength range of the laser signal received by the photoelectric conversion module is 200nm to 1000nm.

10. An electronic device, characterized in that, The optical power detection device includes any one of claims 1-9.

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