In-situ online low-temperature high-pressure ultrafast spectroscopy device, system and method thereof

By using a low-temperature dual-gasbag pressure regulating device and an optical path system, the compatibility problem between low-temperature gasbag pressure regulation and ultrafast spectral measurement has been solved, realizing free pressure increase and decrease and high-precision pressure control, which is suitable for sample research under low temperature and high pressure.

CN119715407BActive Publication Date: 2026-02-27INSTITUTE OF PHYSICS CHINESE ACADEMY OF SCIENCES
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Patent Information

Application Number
CN202411835557.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2026-02-27
Estimated Expiration
2044-12-13

AI Technical Summary

Technical Problem

Existing technologies cannot achieve airbag pressure regulation at low temperatures, are incompatible with spectral testing, and cannot achieve free pressurization and depressurization and high-precision pressure control, nor can they perform ultrafast pump detection under low temperature and high pressure.

Method used

A low-temperature dual-gasbag pressure-regulating high-pressure device was designed, which combines a continuous laser and a femtosecond laser. The pressure is adjusted by the gasbags and temperature sensors to achieve free pressure increase and decrease. Ultrafast spectral measurement is performed by combining the optical path system.

Benefits of technology

It achieves high-precision pressure control and ultrafast spectral measurement at low temperatures, and is suitable for sample research under low temperature and high pressure, improving the reliability of experimental data and imaging quality.

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Abstract

The application provides an online in-situ low-temperature high-pressure ultrafast spectroscopy device, a system and a method thereof. The high-pressure device comprises a cold shield with an optical window, a metal ring, a gasket, a first pressurized air bag, a second pressurized air bag, a pressurized metal column, a diamond anvil cell, a first temperature sensor, a second temperature sensor, a heat-conducting base, a cryostat and a gas pressure controller. The online in-situ pressure calibration and imaging system comprises a continuous light laser, the high-pressure device, online in-situ pressure optical components and an online in-situ pressure imaging system. The low-temperature high-pressure ultrafast pump-probe system comprises a femtosecond laser, the online in-situ pressure calibration and imaging system, pump-probe optical components and a pump-probe imaging system. The application realizes temperature regulation at 6-325K under high pressure with double air bag pressure regulation, realizes online in-situ free pressure regulation at low temperature, and realizes continuous regulation with an accuracy of 0.1GPa in the pressure range of 0-80GPa, and realizes online in-situ low-temperature high-pressure ultrafast spectroscopy and ultrafast dynamics measurement.
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