High-energy fly secondary laser pulse outside cavity compressor

Abstract

A high energy femtosecond laser pulse outer cavity compression arrangement includes one laser amplifier system, thin lens, pulse compression unit, silvering concave mirror, silvering plane reflection mirror, dispersion compensating element, first broadband beam splitting piece, second broadband beam splitting piece, spectrograph, and pulse measurement instrument. It features said pulse compression unit consisting of solid material and vacuum tube, said solid material being used as vacuum tube back light piece and integrated forming, said vacuum tube side wall having inflation port. Said invented device can avoid damage to filter in high-energy pulse incidence state, suitable for large range energy femtosecond laser pulse compression, different wave band incident pulse, and linear polarization and circular polarization incident pulse.

Description

Technical field [0001] The invention relates to a high-energy femtosecond laser, in particular to a high-energy femtosecond laser pulse external cavity compression device, which is mainly suitable for external cavity compression of femtosecond laser pulses on the order of microjoule to hundred millijoules through a solid medium, and is suitable for different Wave band laser pulses are used in high-intensity ultra-fast laser technology and physics research fields. Background technique [0002] Ultra-strong and ultra-short laser pulses are important tools in many basic researches, and they play an irreplaceable role in the field of laser physics research. For example, high-order harmonics, plasma channels, and attosecond pulse generation all require high-intensity ultra-short lasers. The pulse acts as a light source. Although the pulse directly output by the Ti: sapphire laser oscillator can be as short as 5 fs, the gain narrowing effect in the amplification system makes the amplif...

AI Technical Summary

Problems solved by technology

However, since the incident beam is not an ideal Gaussian distribution, the cross-sectional intensity distribution of the beam will become less uniform after the beam passes through the solid medium, that is, there will be spatial chirp. In the past, people used the method of adding a small hole at the focal point of the lens to improve the spatial mode of the beam. , but this will bring a large energy loss, and the pinhole filter at the focal point is easily damaged when a large energy pulse is incident

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