A single-shot sub-pulse width and energy measuring device
An energy measurement and sub-pulse technology, applied in the direction of instruments, etc., can solve the problems of difficult to record information, low time resolution, insufficient time resolution, etc., to achieve the effect of long measurement window and high time resolution
Inactive Publication Date: 2018-08-17
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Problems solved by technology
[0003] For single-shot pulse width and energy measurement, the traditional method of using photodetectors and oscilloscopes to record is difficult to record information within a few picoseconds due to insufficient time resolution
The streak camera can achieve single-shot measurement, but because the time resolution of the streak camera is only tens to several picoseconds, the time resolution is low, and the signal-to-noise ratio of the streak camera is not high
Method used
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Embodiment 1
[0020] Such as figure 1 As shown, in a single-shot pulse width and energy measuring device of the present invention, the femtosecond pulse emitted by the femtosecond laser 1 has a wavelength of 1030 nm, a pulse width of 200 fs, and a pulse energy of 1.9 μJ. The femtosecond pulse is focused by the first convex lens 2 and enters the supercontinuum broadening plate 3 for supercontinuum broadening, and the spectrum is broadened to 450nm-1200nm. The supercontinuum pulse is collimated by the first off-axis parabolic mirror 4, and the pulse time width is stretched by the pulse stretcher 5 to generate chirped light and form a measurement window with a certain time width. In Example 1, the ZF11 glass of Chengdu Guangming Company was used for stretching, the range of 500nm-780nm, and the pulse width of 26ps. After passing through the mirror 6 and the second off-axis parabolic mirror 7, the second off-axis parabolic mirror focuses and enters the optical Kerr sample 12 as a detection pul...
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The invention provides a single-pulse width and energy measurement device. A femtosecond pulse which is transmitted by a femtosecond laser in the single-pulse width and energy measurement device successively penetrates through a first convex lens, a supercontinuum spectral broadening sheet, a first off-axis parabolic reflector, a pulse stretcher, a reflector, a second off-axis parabolic reflector and a polarizer, and afterwards the femtosecond pulse enters a magneto-optic Kerr sample as a detecting pulse. A to-be-measured pulse successively penetrates through an optical delay line, a half-wave plate and a second convex lens, and then enters the magneto-optic Kerr sample. The spectral component, which passes through a polarization analyzer, of the detecting pulse enters the spectrometer, thereby finishing signal acquisition. The single-pulse width and energy measurement device has advantages of high time resolution, high signal-to-noise ratio, etc.
Description
technical field [0001] The invention relates to the field of ultrafast measurement technology, in particular to a single-shot sub-pulse width and energy measurement device. Background technique [0002] The measurement technology based on time-resolved femtosecond optical Kerr gate belongs to the third-order nonlinear measurement method, which can realize the measurement of pulse parameters with high signal-to-noise ratio and high time resolution. The polarizer, the optical Kerr sample, and the analyzer constitute the optical Kerr gate. The polarization of the polarizer and the analyzer are vertical, the angle between the polarization of the pulse to be measured and the polarizer is 45°, and the pulse to be measured is linearly polarized light. When there is no pulse-pumped sample to be measured as the gate-opening signal, the probe light cannot pass through the optical Kerr gate. When there is a pulse-pumped Kerr sample to be measured, the sample will produce birefringenc...
Claims
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IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 张健刘慎业易涛张奔钟全洁
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS