CN221667607U - A Raman spectroscopy system with real-time self-calibration function of excitation light source power - Google Patents

Abstract

The present invention relates to a Raman spectroscopy system with a real-time self-calibration function for the power of an excitation light source. Traditional Raman spectroscopy analysis is easily affected by the power fluctuation of the excitation light source during the experiment, thereby affecting the accuracy of the analysis result. To solve this problem, the present system adopts a Raman spectroscopy system with a real-time self-calibration function for the power of an excitation light source, so that the output power of the excitation light source can be automatically adjusted within a preset range. The system includes a laser, a laser control module, a Raman probe with an optical power monitoring optical path, an optical power meter, a monochromator, and a spectral data acquisition and processing system. The optical power meter measures the power of the excitation light source and transmits the data to a control unit, which intelligently adjusts the power of the excitation light source by comparing the actual power with the preset range. The system ensures the stability of the excitation light source under different experimental conditions and improves the reliability and accuracy of Raman spectroscopy analysis.

Description

A Raman spectroscopy system with real-time self-calibration function of excitation light source power

Technical Field

The utility model relates to the technical field of Raman spectrum detection, in particular to a Raman spectrum analysis system with self-calibration control of excitation light source power.

Background Art

Raman spectroscopy is a non-destructive analysis method that has been widely used in chemistry, materials science, biology and other fields. By measuring the Raman spectrum scattered by the sample, information such as the structure, composition and physical properties of the sample can be obtained. However, when performing Raman spectroscopy, the stability and power control of the light source are crucial. Traditional Raman spectroscopy systems usually use a fixed-power laser light source, but in practical applications, due to environmental factors, changes in sample properties, and laser aging, the output power of the laser light source may fluctuate, resulting in instability of the Raman signal and inaccuracy of the analysis results. In order to solve the problems existing in the prior art, a Raman spectroscopy system with real-time self-calibration function of the excitation light source power is proposed. The system includes a laser, a laser control module, a Raman probe with an optical power monitoring optical path, an optical power meter, a monochromator, and a spectral data acquisition and processing system. By real-time monitoring the output power of the laser light source and adjusting the laser power according to changes in sample characteristics and working environment, the laser power is maintained within the preset power range. The system ensures the stability of the laser power under different conditions, thereby improving the reliability and accuracy of Raman spectroscopy.

Summary of the invention

The present invention proposes a Raman spectroscopy system with a real-time self-calibration function of excitation light source power, comprising a laser, a laser control module, a Raman probe with an optical power monitoring optical path, an optical power meter, a monochromator and a spectral data acquisition and processing system, characterized in that the optical power meter is connected to the Raman probe with the optical power monitoring optical path, the Raman probe with the optical power monitoring optical path divides the incident laser into two parts for Raman signal excitation and power monitoring, performs real-time detection of the optical power and the power of the power monitoring part, feeds back the detected power to the laser control module, and the laser control module fine-tunes the laser power to ensure the stability and accuracy of Raman spectroscopy analysis.

Preferably, the optical power meter proposed includes but is not limited to a photodiode power meter, a pyroelectric power meter, a fiber optic power meter, a semiconductor laser power meter, an ultraviolet (UV) power meter and an infrared (IR) power meter, or a combination thereof, and is used to measure the output power of a laser light source.

Preferably, the splitting ratio of the splitter of the proposed Raman probe with splitting is one or more combinations of transmission 10: reflection 90, transmission 30: reflection 70, transmission 50: reflection 50, transmission 70: reflection 30, transmission 90: reflection 10, and the durability is suitable for incident light with wavelengths ranging from UV to IR.

Preferably, a Raman spectroscopy system with real-time self-calibration function of excitation light source power is proposed, wherein the control unit for controlling the laser light source power adopts a microcontroller, which intelligently adjusts the power of the laser light source to keep it within a preset power range by receiving output data of an optical power meter.

The beneficial effect of the present invention is that by real-time monitoring of the output power of the laser light source and adjusting the power of the light source according to changes in sample characteristics and working environment to maintain it within a preset power range, the stability of the laser power under different conditions is ensured, thereby improving the reliability and accuracy of Raman spectroscopy analysis.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 Schematic diagram of the Raman probe structure with spectroscopic function.

FIG2 is a simplified structural diagram of a Raman spectroscopy analysis system with adaptive light source power control.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the present invention more clear, the Raman spectroscopy analysis system with adaptive light source power control proposed by the present invention will be further described in detail below with reference to FIG. 1 .

The utility model can be implemented in many different forms and should not be understood as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention will be thorough and complete and will fully convey the concept of the present invention to those skilled in the art, and the utility model will only be limited by the claims.

1. The incident light emitted by the laser passes through the optical fiber decoupling device 1 and enters the Raman probe with splitter.

2. The incident light passes through the 2-collimating lens to convert the incident light into parallel light.

3. The incident parallel light is split by a 3-beam splitter with a splitting ratio of 50% transmission and 50% reflection.

4. The reflected parallel light is called L1, and the transmitted parallel light is called L2.

5. The reflected parallel light is called L1, which passes through 5-reflector, 6-bandpass filter, 7-45°reflector, 8-dichroic mirror, and irradiates L1 light onto 10-the surface of the object to be measured through -9 focusing objective lens.

6. According to the characteristics of the sample, a specific wavelength of reflected light will be generated, passing through 8-dichroic mirror, 11-long pass filter, 12-focusing lens and entering 13-fiber coupler.

7. The transmitted parallel light L2 passes through the 4-photoelectric sensing device, converting the L1 optical signal into an electrical signal.

8. The electrical signal generated by the 4-photoelectric sensing device enters the control system through the transmission line.

9. The incident light power is detected through the control system, and the laser power is adjusted through the communication interface.

10. The power data is transmitted back by the control system and compared with the laser incident light power setting, so as to realize self-calibration control of the excitation light source power, thereby improving the reliability and accuracy of Raman spectroscopy analysis.

Claims (4)

1. The Raman spectrum system with the excitation light source power real-time self-calibration function comprises a laser, a laser control module, a Raman probe with an optical power monitoring light path, an optical power meter, a monochromator and a spectrum data acquisition and processing system, and is characterized in that the optical power meter is connected with the Raman probe with the optical power monitoring light path, the Raman probe with the optical power monitoring light path divides incident laser into two parts, namely Raman signal excitation and power monitoring, optical power and power for the power monitoring part are detected in real time, detection power is fed back to the laser control module, and the laser power is finely adjusted by the laser control module, so that stability and accuracy of Raman spectrum analysis are ensured.

2. A raman spectroscopy system having a real time self calibration of excitation light source power according to claim 1 wherein said optical power meter comprises, but is not limited to, one or more combinations of photodiode power meter, pyroelectric power meter, fiber optic power meter, semiconductor laser power meter, ultraviolet and infrared power meter.

3. The raman spectroscopy system with real time self calibration of excitation light source power according to claim 1, wherein the spectroscope of the probe has a spectral ratio of transmission 10 to reflection 90, transmission 30 to reflection 70, transmission 50 to reflection 50, transmission 70 to reflection 30, transmission 90 to reflection 10, and one or more combinations and durability suitable for incident light in a wavelength range from ultraviolet to infrared.

4. The raman spectrum system with the excitation light source power real-time self-calibration function according to claim 1, wherein the control unit for controlling the laser light source power adopts a microcontroller, and the output power of the laser light source is intelligently adjusted by receiving the output data of the optical power meter so as to keep the output power within a preset power range.