Pump-repump-probe time resolved optical spectroscopy system for measuring emission and absorption

By designing a pump-repump-probe time-resolved spectroscopy system that simultaneously measures emission and absorption, the problem of inconsistent excitation conditions in existing technologies has been solved. This system enables simultaneous measurement of sample emission and absorption signals in the same time dimension, improving data reliability and information comprehensiveness, and expanding the application of time-resolved spectroscopy.

CN122448747APending Publication Date: 2026-07-24GUANGZHOU UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGZHOU UNIVERSITY
Filing Date
2026-05-07
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing technologies lack mature systems for simultaneously measuring the emission and absorption signals of samples under the same excitation sequence and the same time dimension. This leads to the need to use two independent spectral systems in the study, making it difficult to ensure consistent excitation conditions, introducing test errors, and the single detection mode has limitations, failing to fully capture information about complex excited-state processes.

Method used

A pump-repump-detector time-resolved spectroscopy system for measuring emission and absorption was designed. Through a laser beam splitting module, a detector optical path construction module, a pump optical path control module, a repump optical path adjustment module, and a dual-channel signal acquisition module, the pump light, repump light, and detector light are made to coincide in the same spatial position on the sample, and the emission and absorption signals are captured synchronously. Combined with an optical path coupling and convergence module, the excitation conditions are ensured to be consistent.

Benefits of technology

Completely avoids testing errors, improves data reliability, fully presents the complementary dynamic information of radiative and non-radiative recombination, expands the application scope of time-resolved spectroscopy, and provides technical support for the study of complex excited state regulation.

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Abstract

The application discloses a pump-repump-probe time-resolved spectrum system for measuring luminescence and absorption, comprising a laser beam splitting module, a probe light path construction module, a pump light path regulation module, a repump light path adjustment module, a double-channel signal acquisition module and a light path coupling and converging module. The same femtosecond laser is used to split a light beam, two-stage light splitting is performed to obtain initial light beams of pump, repump and probe light paths, and each light path is subjected to delay adjustment, wavelength conversion, focusing and other treatments, and then is precisely coupled at the same spatial position of a sample. The double-channel signal acquisition module synchronously captures luminescence signals and probe light transmission signals of the sample, and realizes data acquisition in combination with reference light path calibration. The test method acquires multidimensional dynamic information through light path optimization, light beam coupling, signal synchronous acquisition and analysis. The system realizes synchronous detection of luminescence and absorption signals under the same excitation condition, and solves the test error and single mode limitation of the traditional independent system.
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