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Time pulse width measurement system for ultrashort pulses in different spatial positions and measurement method thereof

A technology of ultrashort pulse and spatial position, applied in the field of optoelectronics, can solve the problem of inaccurate measurement of the time change process of ultrashort pulse

Inactive Publication Date: 2012-02-15
HUNAN UNIV
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Problems solved by technology

It can be seen from the above that the existing technical methods can accurately measure the ultrafast time response during the interaction between light and matter and the time change during the transmission of laser pulses, but they cannot accurately measure the time of different spatial positions in the entire airspace of ultrashort pulses. transformation

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  • Time pulse width measurement system for ultrashort pulses in different spatial positions and measurement method thereof
  • Time pulse width measurement system for ultrashort pulses in different spatial positions and measurement method thereof
  • Time pulse width measurement system for ultrashort pulses in different spatial positions and measurement method thereof

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Embodiment Construction

[0034] The present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

[0035] Such as figure 1 As shown, the time pulse width measurement system of different spatial positions of ultrashort pulses in this embodiment includes an ultrashort pulse light source 1, a beam splitter 2, mirrors 3a-3e, an optical delay platform 4, a nonlinear medium 5, a tunable Slit 6, nonlinear sum frequency crystal 7 (BBO crystal) and precision detection instrument 8.

[0036] The functions of the above parts are described as follows:

[0037]Ultrashort pulse light source 1, used to generate femtosecond pulses with relatively narrow pulse width;

[0038] The beam splitter 2 is used to divide the ultrashort pulse from the laser into two paths of light with different intensities. In this embodiment, a beam splitter with a transmittance of 90% and a reflectance of 10% is used;

[0039] Reflectors 3a to 3e are used for reflection of ultras...

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Abstract

The invention discloses a time pulse width measurement system for ultrashort pulses in different spatial positions and a measurement method thereof. The time pulse width measurement system for ultrashort pulses in different spatial positions comprises an ultrashort pulse light source, a beam splitter, a reflector, an optical delay platform, a nonlinear medium, a slit, a nonlinear sum frequency crystal and a precise detector. The time pulse width measurement system utilizes the pump-detection technology to realize the precise measurement of the ultrashort pulses in a time change process in different spatial positions in the whole airspace in a nonlinear transmission process, thereby simply, conveniently and quickly measuring the time change process of the ultrashort pulses in the differentspatial positions in the whole airspace in transmission, and having high measurement precision.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a time pulse width measurement system and a measurement method for ultrashort pulses at different spatial positions. Background technique [0002] When an ultrashort laser pulse is transmitted in a medium, its electromagnetic field will induce a change in the refractive index of the medium, and the change in the medium’s refractive index will react on the optical field, thereby affecting the relevant transmission characteristics of the ultrashort pulse, resulting in a spatial distribution of the ultrashort pulse , pulse shape, polarization state and spectrum change, resulting in various nonlinear effects, such as: self-focusing effect, which will lead to damage or even destruction of optical components. Therefore, it is very necessary to accurately measure the temporal and spatial changes of the ultrashort pulse during its transmission in the medium, which will help us to...

Claims

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Application Information

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IPC IPC(8): G01J11/00G02B27/10
Inventor 傅喜泉邓杨保谭超文双春
Owner HUNAN UNIV
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