Ultrashort pulse measuring device utilizing reflective dammann grating

A Damman grating and measuring device technology, applied to instruments and other directions, can solve problems such as increased adjustment difficulty, increased cost, inaccurate measurement results, etc., and achieves the effect of convenient adjustment of the optical path, easy processing, and elimination of broadening.

Inactive Publication Date: 2006-05-24
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

However, the beam splitters in most ultrashort pulse measurement devices currently use half-transparent mirrors. Femtosecond laser pulses are very short pulses with a wide spectrum, so the transmitted ultrashort pulses must be broadened. influence, resulting in inaccurate measurement results; by figure 1 It can also be seen that more mirrors are used in the measurement device, which not only increases the difficulty of adjustment, but also increases the cost

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  • Ultrashort pulse measuring device utilizing reflective dammann grating
  • Ultrashort pulse measuring device utilizing reflective dammann grating
  • Ultrashort pulse measuring device utilizing reflective dammann grating

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0030] see first figure 2 with image 3, as can be seen from the figure, the present invention utilizes the ultra-short laser pulse measuring device of reflective Damman grating, including beam splitter, converging mirror 4, nonlinear crystal 5, aperture 6 and spectrometer 7, characterized in that the The beam splitter 3 is a micro-motion stage controlled by a first 1×2 reflective Damman grating 31, a second 1×2 reflective Damman grating 32, a third 1×2 reflective Damman grating 33, and a computer. 34. A reflective Damman grating beam-splitting delayer formed by the three-dimensional configuration of the first baffle 35 and the second baffle 36. The second 1×2 reflective Damman grating 32 is placed in a computer-controlled micro-motion On stage 34, described converging m...

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Abstract

The measuring device includes beam-splitting delayer, convergent mirror, nonlinear crystal, diaphragm and spectrograph. Characters are that the said beam-splitting delayer is reflecting type beam-splitting delayer of Daman grating composed of three pieces of 1í‡2 reflecting type Daman grating and two pieces of light barrier configured in 3D. The convergent mirror is reflecting type convergent mirror. The invention solves issue of spread of ultrashort pulse caused by light beam penetrating through medium in measurement procedure of ultrashort laser pulse. Features are: simplified structure, easy of adjustment and low cost.

Description

technical field [0001] The invention relates to an ultrashort laser pulse, in particular to an ultrashort laser pulse measuring device using a reflective Damman grating. Background technique [0002] Since the 1990s ultrashort pulses especially femtosecond (fs 10 -15 Second) laser technology has achieved rapid development. Due to the ultrashort time-domain characteristics of femtosecond laser pulses, it is possible to study ultrafast phenomena in the fields of physics, chemistry, biology, and medicine. At the same time, femtosecond laser pulses also have extremely high peak power, which is a powerful tool for the study of various nonlinear phenomena. [0003] The research of various phenomena under the action of femtosecond laser pulses is realized by femtosecond pulse measurement technology, and the physical nature of femtosecond dynamic system response is obtained by measuring the time domain, frequency domain and transmission characteristics of femtosecond light. At the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J11/00
Inventor 周常河戴恩文
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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