A Tunable Pump-Probe System Based on Supercontinuum Light Source
A supercontinuum light source and detection system technology, which is applied in the field of pump-detection system and tunable pump-detection system, can solve the problems of high cost, complex device, and unstable operation, and achieve low operating environment requirements, The effect of strong realization and simple installation
Active Publication Date: 2021-11-12
NANJING UNIV
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Problems solved by technology
High-power Ti:Sapphire lasers have high requirements on the operating environment and cannot operate stably in ordinary experimental environments
In addition, Ti:Sapphire lasers and parametric amplifiers are relatively large in size, complex in device, and high in cost, further limiting their use in pump-probe applications.
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[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0017] The described tunable pump-probe system based on the supercontinuum light source, such as figure 1 shown. The system consists of femtosecond fiber laser and laser beam splitting device 1, supercontinuum light source and wavelength filtering device 2, sample and detection receiving device 3, time delay device 4, image locking amplification and data acquisition device 5. The implementation process of the pump-probe system is as follows: the femtosecond fiber laser is divided into two beams by a beam splitter. A part of the light is used as the pumping light path, and the other part of the light generates a supercontinuum and is combined with a filter to obtain a probe light with tunable wavelength.
[0018] The femtosecond fiber laser provides ultra-short pulse output with watt-level power and pulse width of femtosecond-level. The ultrashort pulse las...
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A tunable pump-detection system based on supercontinuum light source, including femtosecond fiber laser and laser beam splitting device, supercontinuum light source and wavelength filter device, sample and detection receiving device, time delay device, lock-in amplification and data acquisition device; the femtosecond fiber laser and the laser beam splitter divide the laser into two beams; one beam of light is used as pump light, and the nonlinear effect generated by the incident of the other beam into the highly nonlinear optical fiber produces a supercontinuum, and The wavelength is tunable from the visible light band to the near-infrared band, and combined with wavelength and bandwidth tunable filters to obtain wavelength tunable probe light; after the pump light and probe light pass through the time delay device, they are incident on the same position of the sample; the sample is in the A nonlinear photoelectric response is generated under the irradiation of the pump light, which modulates the detection light passing through it; the detection light is filtered and received by the data receiving device.
Description
technical field [0001] The invention relates to a pump-detection system, in particular to an adjustable pump-detection system based on a supercontinuum light source, and belongs to the field of ultrafast spectrum detection. Background technique [0002] Ultrafast laser provides people with up to 10 -15 Optical probes with second time resolution, resulting in ultrafast laser pump-probe technology for studying the energy levels of excited states of matter and ultrafast dynamics. In the pump-probe technique, the output of an ultrafast laser is split into two beams by a beam splitter. One beam is pumping light, and the other beam passes through a wavelength conversion device to obtain probe light with tunable wavelength. The repetition frequency of the pumping and probing pulsed lasers is the same. The time-delay platform is used between the pumping and probing lasers, allowing the two lasers to travel different distances in space. Therefore, the two beams of pulses can reac...
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IPC IPC(8): G01N21/39
CPCG01N21/39
Inventor 王枫秋朱诗雨黎遥徐永兵施毅张荣
Owner NANJING UNIV