Femtosecond seed pulse generation device with large energy cycle level and ultra-high signal-to-noise ratio

Abstract

The invention relates to a high-energy few-cycle ultra-high-signal to noise ratio femtosecond seed pulse generation device. Laser outputted by an 800nm-wave band 1kHz laser is split into two beams; one of the two laser beams passes through a beam contracting system and a frequency multiplication crystal, so that a 400nm frequency-multiplied light can be generated, and the frequency-multiplied light passes through a light delay system, and then, adopted as pumping light, is injected into a nonlinear crystal; the other laser beam passes through a beam contracting system, a focusing system, an all-solid-state spectral broadening system, a dispersion compensation system and a cross polarization wave generating system sequentially, and then, adopted as signal lights, are injected into the nonlinear crystal, and the signal lights and the pumping light are altogether subjected to optical parametric amplification. The all-solid-state spectral broadening system is adopted, so that the spectrum of incident light can be effectively broadened, and therefore, the system can operate compactly and stably assuredly, and at same time, the device is convenient to adjust, is simple and efficient, can achieve integration and miniaturization, and can provide a high-quality seed source for ultrashort laser system.

Description

technical field

[0001] The invention relates to the field of ultra-short laser pulses, in particular to a period-level ultra-high signal-to-noise ratio seed source. By combining all-solid-state spectral broadening, cross-polarized wave generation, second harmonic generation, and type I near-degenerate optical parametric amplification process, a femtosecond seed pulse generation device with large energy period and ultra-high signal-to-noise ratio is proposed. Background technique

[0002] for the structure of matter in attoseconds (10 -18 s) order of time resolution and nanometer (10 -9 m) The huge demand for observation and manipulation on the spatial scale makes people urgently need attosecond coherent light sources. The use of solid-state high-order harmonics driven by ultra-intense and ultra-short lasers is one of the most promising ways to realize low-cost, desktop, and continuously tunable attosecond coherent light sources. The laser pulse with high peak power, ultra...

Examples

Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] ① Split the P-polarized light output by the 800nm ​​kilohertz laser with a beam splitter. One of the laser beams first passes through the beam reduction system composed of the first concave mirror and the first convex mirror, then is focused by the second concave mirror, reflected by the first total reflection mirror, passes through the fused silica window group, and the transmitted light passes through a small After the beam is limited by the aperture diaphragm, it is reflected by the third concave mirror, and the dispersion compensation is performed through the chirped mirror pair and the fused silica wedge pair in turn. The light after dispersion compensation is polarized by the first Glan prism, and then focused by the first convex lens and sequentially enters the first BaF 2 Crystal, second BaF 2 The crystal outputs laser light in the S polarization state...

technical field

[0001] The invention relates to the field of ultra-short laser pulses, in particular to a period-level ultra-high signal-to-noise ratio seed source. By combining all-solid-state spectral broadening, cross-polarized wave generation, second harmonic generation, and type I near-degenerate optical parametric amplification process, a femtosecond seed pulse generation device with large energy period and ultra-high signal-to-noise ratio is proposed. Background technique

[0002] for the structure of matter in attoseconds (10 -18 s) order of time resolution and nanometer (10 -9 m) The huge demand for observation and manipulation on the spatial scale makes people urgently need attosecond coherent light sources. The use of solid-state high-order harmonics driven by ultra-intense and ultra-short lasers is one of the most promising ways to realize low-cost, desktop, and continuously tunable attosecond coherent light sources. The laser pulse with high peak power, ultra...

Examples

Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] ① Split the P-polarized light output by the 800nm ​​kilohertz laser with a beam splitter. One of the laser beams first passes through the beam reduction system composed of the first concave mirror and the first convex mirror, then is focused by the second concave mirror, reflected by the first total reflection mirror, passes through the fused silica window group, and the transmitted light passes through a small After the beam is limited by the aperture diaphragm, it is reflected by the third concave mirror, and the dispersion compensation is performed through the chirped mirror pair and the fused silica wedge pair in turn. The light after dispersion compensation is polarized by the first Glan prism, and then focused by the first convex lens and sequentially enters the first BaF 2 Crystal, second BaF 2 The crystal outputs laser light in the S polarization state...

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