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Nile red dye laser for acid detection

A dye laser and Nile red technology, applied in the field of dye lasers, can solve the problems of inaccurate detection results and low sensitivity of detection results, and achieve the effects of expanding the detection range, high detection sensitivity, and easy operation

Pending Publication Date: 2019-12-31
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this acid indicator is easily affected by other interferences such as smoke, acetone, gasoline, etc., and the test results are inaccurate
In addition, the principle of this acid indicator is based on fluorescence detection, the spectral range is wide, and the sensitivity of the detection result is not high.

Method used

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  • Nile red dye laser for acid detection
  • Nile red dye laser for acid detection
  • Nile red dye laser for acid detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: figure 1 Shown is the optical path diagram of the Nile red dye laser that realizes acid detection in the patent of the present invention. This system includes a laser pump source, an optical system and a dye laser resonator. The laser light source 1 is a Nd:YAG solid-state laser, and the light emitted by the pump source passes through the frequency doubling crystal 2 and irradiates the energy adjustment system composed of the half-wave plate 3 and the polarizer 4 . The first total reflection mirror 5 and the second total reflection mirror 6 are the same laser dichroic mirrors, which transmit the 1064nm pump light, and the 532nm frequency doubled light is reflected back as the direct pump light of the dye laser cavity. The focusing lens 7 and the pinhole diaphragm 8 serve as a shaping system for the incident pump light. The focusing lens 7 is common K9 glass with a focal length of 100 mm; the aperture diameter of the aperture diaphragm 8 is 5 mm. The dye la...

Embodiment 2

[0030] Example 2: The difference between this example and Example 1 is that the concentration of Nile Red ethanol solution is increased to 200 μg / mL.

[0031] like image 3As shown, in 200μg / mL Nile Red ethanol solution, as the sulfuric acid concentration increases from 0ppm to 100ppm, the output laser peak position increases from 653.82nm to 679.15nm, which also covers nearly 26nm. Curve 1 represents the pump light at 532nm, and curves 2, 3, 4, 5, and 6 represent the output laser spectra at 0ppm, 10ppm, 20ppm, 50ppm, and 100ppm doped sulfuric acid concentrations, respectively. Compared with Example 1, the detection range of Example 2 is in a sulfuric acid environment above 100ppm, and the output laser peak position is almost unchanged, resulting in a decrease in the detection range. Therefore, it is recommended to use 60 μg / mL Nile Red ethanol solution as an acidic detection base material.

[0032] like Figure 4 As shown, in the detection process, with the increase of the...

Embodiment 3

[0033] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the single-layer cuvette structure is optimized to a double-layer serial cuvette structure. like Figure 5 As shown, a plane dichroic mirror 9, a double-layer series quartz cuvette 13 and an output coupling mirror 11 constitute a resonant cavity. In the double-layer quartz cuvette 13 connected in series, the front cavity is filled with 60 μg / mL rhodamine 6G ethanol solution, and the back cavity is filled with 60 μg / mL Nile Red ethanol solution. like Image 6 As shown, curve 1 represents the pump light at 532nm, curve 2 represents the laser spectrum of rhodamine 6G / ethanol solution in the double-sided cuvette structure, and curves 3, 4, 5, 6, 7, 8, 9 represent 0ppm respectively , 10ppm, 20ppm, 50ppm, 100ppm, 200ppm and 500ppm concentration of sulfuric acid environment output Nile red / ethanol solution laser spectrum. It can be seen that in the Nile Red ethanol solution of 60 μg / mL, as the con...

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Abstract

The invention provides a Nile red dye laser for acid detection. The solvation color development characteristic of Nile red is utilized, Nile red is doped with sulfuric acid / ethanol solutions with different concentrations, laser output under different doping concentrations is obtained, and therefore the purpose of sulfuric acid detection is achieved. Meanwhile, in order to increase the detection range and avoid time instability and wavelength drift in an experiment, a novel tandem double cuvette method is adopted, a Nile red / ethanol solution and a rhodamine / ethanol solution are respectively placed in a front cavity and a rear cavity of the cuvette, the laser output in a 40 nm tuning range is obtained, and the time instability of the output laser is well inhibited. The novel Nile red dye laser for acid detection has a wide application prospect in the fields of biochemical detection, laser chemistry, laser spectrum technology and the like.

Description

technical field [0001] The invention relates to a dye laser, in particular to a Nile red dye laser used for acid detection. Background technique [0002] Since its inception more than 50 years ago, laser has been widely used in laser communication, spectroscopy, optical imaging, biochemical detection and other fields due to its advantages such as good coherence, good directionality and high brightness. In recent years, organic dye lasers have attracted the attention and research of many scholars and scientists due to their advantages such as simple structure, convenient operation, diverse materials, and wide fluorescence spectrum. In the study of dye lasers, dyes that can be used as laser gain media are one of the hotspots of research. Whether organic dyes can be used as laser gain media depends on their energy level structure and chemical properties. At present, the most commonly used laser dyes are coumarin, xanthine, pyrrolidone, etc. These dyes have high fluorescence i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/094H01S3/213H01S3/081G01N21/39
CPCH01S3/094049H01S3/213H01S3/081G01N21/39G01N2021/397G01N2021/391
Inventor 方昱玮程军杰王声波董天浩顾春许立新
Owner UNIV OF SCI & TECH OF CHINA