Multichannel optical fiber fluorescence sensor

Abstract

The invention provides a multichannel optical fiber fluorescence sensor, which comprises a light source, an excitation light splitting device, a signal light splitting device connected with the excitation light splitting device, a probe array and a light filter device which are connected with the signal light splitting device, an imaging system connected with the light filter device, and a controland data display terminal in communication connection with the light source and the imaging system. The probe array comprises fiber probes. Each fiber probe has an exposed core area and a quantum dot. The excitation light emitted by the light source is coupled into different fiber probes through the light splitting device; evanescent waves generated on the surfaces of the probes excite the quantum dots on the probes to generate fluorescence signals; the signal light of the fluorescence signals is collected by the fiber probes and coupled into the light filter module through the light splitting device, thereby realizing multichannel fluorescence signal acquisition; the detection structure can be visually displayed in the imaging system; and the multichannel optical fiber fluorescence sensor is relatively low in cost, is relatively small in size, is convenient to carry and can quickly obtain the result.

Description

technical field [0001] The invention relates to a biochemical sensing device, in particular to a multi-channel optical fiber fluorescence sensor. Background technique [0002] Optical fiber fluorescence sensor is a new type of sensor that organically combines fluorescence detection technology and optical fiber sensing technology. This type of sensor uses optical fiber as the carrier of light transmission, and uses a remote probe to detect samples and collect fluorescence signals. It is different from traditional sensors. In comparison, optical fiber fluorescence sensors are widely used because of their small size, strong anti-electromagnetic interference ability, corrosion resistance, high sensitivity, good specificity, and fast response speed. [0003] However, most of the existing optical fiber fluorescence sensors have a single detection channel, which has the disadvantages of single detection amount, limited detection species and low detection efficiency. With the impro...

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Problems solved by technology

[0004] At present, there are two main implementation schemes for multi-channel fiber optic fluorescence sensors: one is based on multi-detectors, and the other is based on fiber optic spectrometers; the former has a complex system, relatively high cost, and is bulky and portable Inconvenient, difficult to apply to on-site detection; the intensity information of the latter is not intuitive, and it is difficult to obtain results quickly

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