Stable high-contrast femtosecond laser pulse source

A high-contrast, femtosecond laser technology, applied in lasers, laser components, optics, etc., can solve problems such as poor contrast capability, poor stability, and high cost, and achieve long-term work stability, high pulse time-domain contrast, and Effects of Avoiding Serious Injury Problems

Inactive Publication Date: 2013-07-17
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Saturable absorber technology is a simple and traditional method, but the ability to improve contrast is not strong
Double-chirped pulse amplification technology can effectively improve the contrast, but the cost is high and the structure is more complicated
The cross-polarized wave generation technology has a simple structure, is easy to use, and can generate b

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  • Stable high-contrast femtosecond laser pulse source
  • Stable high-contrast femtosecond laser pulse source
  • Stable high-contrast femtosecond laser pulse source

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[0019] The present invention will be further described below in conjunction with the embodiments and drawings, but the protection scope of the present invention should not be limited by this.

[0020] Please refer to figure 1 , figure 1 It is a schematic structural diagram of an embodiment of a stable high-contrast femtosecond laser pulse seed source of the present invention. It can be seen from the figure that the stable high-contrast femtosecond laser pulse seed source of the present invention includes a pump source 1. On the optical path of the pump light output from the pump source 1, there are a beam splitter 2, a polarizer 3, and a second A lens 4, a hollow fiber 6 placed in a vacuum tube cavity 5, a first dispersion compensation device 7, a first mirror 8, a second mirror 9, a second lens 10, a cross-polarized wave generator 11, a half-wave plate 12 And the third reflector 13, in the direction of the reflected beam of the beam splitter 2 is the second harmonic generator 14...

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Abstract

A stable high-contrast femtosecond laser pulse source comprises a pumping source, a spectrum broadening system, a laser pulse purification system, a parametric amplification system and a dispersion compensation system. The pulse is subjected to shaping filtering through hollow optical fibers, to pulse purification through a cross polarized wave generating device, to optical parametric amplification and pulse compression, finally, the output of the high-contrast femtosecond laser pulse is achieved. According to the high-contrast femtosecond laser pulse source, not only the problem of the serious damage to crystals due to cross polarized waves under large energy is avoided, but also the stable output of the high-contrast femtosecond laser pulse during long working time is achieved. The stable high-contrast femtosecond laser pulse source is widely applicable to attosecond pulse generation and the like.

Description

technical field [0001] The invention relates to ultrashort laser pulses, in particular to a stable high-contrast femtosecond laser pulse seed source. The device amplifies the low-energy high-contrast femtosecond laser pulses generated by cross-polarized waves through an optical parameter amplification process, and then compensates and compresses them to achieve long-term stable output of high-contrast ultrashort laser pulses. Background technique [0002] With the rapid development of laser technology, the focus power density of high-power laser systems has reached >10 22 W / cm 2 , which may reach >10 in the near future 25 W / cm 2 , at such extreme intensities, the time-domain contrast of ultra-intense and ultra-short laser pulses has become a key factor in cutting-edge research such as high-field laser physics. The time-domain contrast of ultra-intense and ultra-short laser pulses is defined as the ratio of the intensity of the main pulse to the intensity of other s...

Claims

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Application Information

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IPC IPC(8): H01S3/10H01S3/13G02F1/39G02F1/37
Inventor 李妍妍冷雨欣郭晓杨许毅邹晓李儒新徐至展
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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