Fluorescent optical fiber temperature measuring system for biomedicine

Abstract

The invention relates to the technical field of optical fiber temperature measurement, in particular to a fluorescent optical fiber temperature measurement system for biomedicine, which comprises a probe, a coupler and a driving circuit, the output end of the coupler is connected with a lens I through an optical fiber, the coupler is connected with the probe through a Y-shaped optical fiber, and the probe is connected with a lens III through a Y-shaped optical fiber. The sides, away from the optical fiber, of the second lens and the third lens are each provided with a laser sheet, the sides, away from the optical fiber, of the laser sheets are connected with a photoelectric detector, the output end of the photoelectric detector is connected with a signal amplification circuit, and the output end of the amplification circuit is connected with a filter. The filter output end connected with one end of the Y-shaped optical fiber is connected with a division circuit. According to the fluorescence optical fiber temperature measurement system for biomedicine, the reference signal related to the reference excitation signal is adopted, the influence of inherent excitation light leakage of a phase locking scheme on a fluorescence fading signal is successfully solved, and the measurement precision is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of optical fiber temperature measurement, in particular to a fluorescent optical fiber temperature measurement system for biomedicine. Background technique [0002] The test of fluorescence lifetime only involves the relative intensity of fluorescence at the test point during the process of fluorescence decay, and the test of fluorescence lifetime is only related to the properties of the fluorescent temperature sensing probe and the working temperature, and has nothing to do with the intensity of pump light and the optical path transfer factor. The test results It will not be affected by changes in the coupling conditions of the entire fiber and the state of the optical path. [0003] Fluorescence temperature measurement is a new type of temperature measurement technology developed in recent years. There are many measurement schemes for fluorescence lifetime in foreign literature, among which the application...

AI Technical Summary

Problems solved by technology

At present, there are quite a number of data processing schemes for detecting fluorescence lifetime, but these schemes have obvious deficiencies, such as failing to utilize the information contained in the entire decay process, measuring the dynamic range and cumbersome numerical algorithms, which make the program design complicated and extremely difficult. Large extended signal processing time, etc.

The obvious defects of these schemes have seriously affected the measurement accuracy and response speed of the fluorescence thermometer, making it difficult to popularize.

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