High-energy intermediate infrared femtosecond laser and infrared femtosecond laser generating method thereof

A femtosecond laser, infrared laser technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problem of not considering dispersion compensation, difficult to generate mid-infrared femtosecond pulse laser, limited nonlinear optical crystal damage threshold and other problems, to achieve the effect of good cooling effect, small thermal effect and good mode matching.

Pending Publication Date: 2021-08-31
JINAN UNIVERSITY
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  • Application Information

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Problems solved by technology

In principle, this technology can generate higher-energy mid-infrared picosecond pulse lasers, but it is limited by the damage threshold of nonlinear optical crystals and does not consider dispersion compensation, so it is difficult to generate high-energy (mJ level) mid-infrared femtosecond lasers. second pulse laser

Method used

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  • High-energy intermediate infrared femtosecond laser and infrared femtosecond laser generating method thereof
  • High-energy intermediate infrared femtosecond laser and infrared femtosecond laser generating method thereof

Examples

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Embodiment 1

[0027] figure 1It is a schematic diagram of the optical path of a high-energy mid-infrared femtosecond laser of the present invention, see figure 1 A high-energy mid-infrared femtosecond laser includes a 2-micron femtosecond mode-locked laser 1, an optical isolator 2, a pulse stretcher 3, a 2-micron laser amplifier 4, a regenerative amplifier synchronously pumped optical parametric oscillator 5, and a mid-infrared laser Amplifier 8 and pulse compressor 15; the 2-micron femtosecond pulse laser output by the 2-micron femtosecond laser oscillator 1 is converted into a 2-micron picosecond pulse laser through an optical isolator 2 and a pulse stretcher 3 in turn, and then injected into a 2-micron laser Amplifier 4; the amplified 2-micron picosecond pulse laser first passes through the regenerative amplifier synchronously pumping the optical parametric oscillator 5 to generate a mid-infrared picosecond pulse laser, and the mid-infrared picosecond pulse laser passes through the first...

Embodiment 2

[0033] The difference between Embodiment 2 and Embodiment 1 is that the mid-infrared laser amplifier 8 uses the mid-infrared laser pump source 14 and the mid-infrared laser pump source 15 for double-ended pumping, and the mid-infrared laser pump source 14 and the mid-infrared laser pump The pump sources 15 are respectively arranged under the second cavity mirror 12 and above the first cavity mirror 10, which increases the pump light power and reduces the thermal effect of the laser crystal, and can achieve higher energy and better beam quality. Infrared femtosecond laser output.

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Abstract

The invention discloses a high-energy intermediate infrared femtosecond laser and an intermediate infrared femtosecond laser generation method thereof. The laser comprises an intermediate infrared picosecond pulse laser light path, an intermediate infrared laser amplifier and a pulse compressor which are arranged in sequence, wherein the mid-infrared laser amplifier adopts a multi-stroke batten amplification structure. The mid-infrared ultra-short pulse laser is amplified by adopting a multi-stroke batten structure, so that the mid-infrared ultra-short pulse laser has the advantages of good mode matching, good refrigeration effect, small heat effect, high gain and the like, and mid-infrared ultra-short pulse laser output with high energy, high efficiency and high beam quality can be obtained.

Description

technical field [0001] The invention relates to the technical field of ultrafast lasers, in particular to a high-energy mid-infrared femtosecond laser and a method for generating the mid-infrared femtosecond laser. Background technique [0002] Mid-infrared femtosecond laser has a wide range of applications in thermal imaging, environmental monitoring, mid-infrared guidance, photoelectric countermeasures and other fields. In particular, mid-infrared femtosecond lasers with high pulse energy have unique advantages in strong field physics, attosecond science, high-order harmonic generation, frequency comb precision measurement and other application fields. [0003] At present, mid-infrared femtosecond lasers are mainly produced by down-converting femtosecond laser parameters in the visible or near-infrared bands, including optical parametric oscillation (OPO) and optical parametric amplification (OPA). Using OPO to generate mid-infrared femtosecond laser needs to adopt synchr...

Claims

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Application Information

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IPC IPC(8): H01S3/10H01S3/06H01S3/16
CPCH01S3/0602H01S3/10007H01S3/10023H01S3/163
Inventor 代世波朱思祁张沛雄尹浩李真陈振强
Owner JINAN UNIVERSITY
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