Ultra-chirped laser pulse asymmetric four-grating compression device

Abstract

An asymmetric four-grating compression device for ultra-strong chirped laser pulses, the present invention utilizes the asymmetric structure of the four-grating compression device to introduce spatial dispersion, thereby reducing the modulation degree of the laser pulse emitted from the compression device and enhancing the compression device can withstand the maximum output energy. Compared with the conventional symmetrical four-grating compressing device, the present invention only performs simple structural changes to turn the symmetrical structure into an asymmetrical structure, without adding other optical elements or increasing the complexity of adjustment, so that the present invention can enhance the The compression device has the advantages of economical cost, simple structure and stability while maintaining the maximum output energy that the compression device can bear.

Description

technical field

[0001] The invention relates to an ultra-strong and ultra-short laser, in particular to an asymmetric four-grating compression device for ultra-strong chirped laser pulses. The device is used to increase the maximum output energy that a super chirped laser pulse compression device can withstand. Background technique

[0002] The ultra-strong peak power and ultra-short time-domain characteristics of ultra-intense ultra-short laser pulses provide unprecedented extreme physical conditions for human beings. It has important applications in the field of cutting-edge scientific research. It is precisely because of these important applications that promote the further development of ultra-intense and ultra-short lasers. Currently, there are more than 50 sets of petawatts (PW, 10 15 Watts) scale laser devices, and even hundreds of PW scale laser devices are under planning and construction.

[0003] At present, ultra-intense and ultra-short laser pulses mainly rely...

Examples

Embodiment Construction

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but the protection scope of the present invention should not be limited by this.

[0021] see figure 1 , 2 , the parameters of the super chirped laser pulse output from the amplifier are: center wavelength 925nm, full spectrum width 200nm, spectrum is 6th order Gaussian shape, chirped pulse width 4ns, Fourier transform limit full width at half maximum pulse width 14.5fs, light spot For full size 500×500mm 2 10th order Gaussian shaped spot.

[0022] The spot shape of the ultra-chirped laser pulse output from the amplifier is as follows figure 2 (a), in figure 2 In (a), take Y=0 (X-axis) along the X-axis direction and the intensity distribution curve of the light spot at X=0 (Y-axis) along the Y-axis direction, respectively, to obtain figure 2 From the intensity distribution curve corresponding to (c), it can be seen that the spot modulation degree of...

technical field

[0001] The invention relates to an ultra-strong and ultra-short laser, in particular to an asymmetric four-grating compression device for ultra-strong chirped laser pulses. The device is used to increase the maximum output energy that a super chirped laser pulse compression device can withstand. Background technique

[0002] The ultra-strong peak power and ultra-short time-domain characteristics of ultra-intense ultra-short laser pulses provide unprecedented extreme physical conditions for human beings. It has important applications in the field of cutting-edge scientific research. It is precisely because of these important applications that promote the further development of ultra-intense and ultra-short lasers. Currently, there are more than 50 sets of petawatts (PW, 10 15 Watts) scale laser devices, and even hundreds of PW scale laser devices are under planning and construction.

[0003] At present, ultra-intense and ultra-short laser pulses mainly rely...

Examples

Embodiment Construction

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but the protection scope of the present invention should not be limited by this.

[0021] see figure 1 , 2 , the parameters of the super chirped laser pulse output from the amplifier are: center wavelength 925nm, full spectrum width 200nm, spectrum is 6th order Gaussian shape, chirped pulse width 4ns, Fourier transform limit full width at half maximum pulse width 14.5fs, light spot For full size 500×500mm 2 10th order Gaussian shaped spot.

[0022] The spot shape of the ultra-chirped laser pulse output from the amplifier is as follows figure 2 (a), in figure 2 In (a), take Y=0 (X-axis) along the X-axis direction and the intensity distribution curve of the light spot at X=0 (Y-axis) along the Y-axis direction, respectively, to obtain figure 2 From the intensity distribution curve corresponding to (c), it can be seen that the spot modulation degree of...

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