High-energy 1.0[mu]m single-frequency laser amplification system with 100ns pulse width

Abstract

The invention discloses a high-energy 1.0[mu]m laser amplification system with 100ns pulse width. The system employs a 1.0[mu]m DFB semiconductor laser as a seed source so as to obtain high-stabilitysingle-frequency laser output. The system utilizes an optical fiber amplification module for chopping, the continuous seed source is chopped into pulse laser with a Lorentz waveform rising edge through an acoustic optical modulator, and finally the width of laser pulse is continuously widened through the amplification effect of a rear-stage solid amplification module, so that 1.0[mu]m pulse laserwith the pulse width greater than 100ns is obtained. According to the invention, the single frequency and stability of 1.0[mu]m laser are ensured, and a new technical route is provided for coherent detection radar to adopt a 1.0[mu]m laser light source through the characteristic that the laser pulse width is gradually broadened through the laser amplification effect.

Description

technical field [0001] The invention relates to an all-solid-state laser, in particular to a single-frequency laser amplifying system with a high-energy 100 ns pulse width of 1.0 μm. Background technique [0002] At present, lasers have become an indispensable tool for modern science and technology to explore and solve engineering problems. The output performance of this pair of lasers is getting higher and higher, such as single frequency, high beam quality, large energy output and different pulse widths. Especially the 1.0μm laser produced by Nd:YAG crystal, due to the high maturity of the laser, the application field of the laser is more and more extensive, and the demand for energy is also getting higher and higher. [0003] At present, the technical approach to obtain a large-energy 1.0 μm pulsed laser is basically to continuously amplify the pulsed laser step by step through a solid-state amplification system to obtain a large energy output. Among them, the main ampl...

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Problems solved by technology

Among them, the main amplification system adopts the technical scheme of oscillation stage plus amplification module. In this scheme, the energy output by the oscillation stage in mJ or even tens of mJ directly enters the solid amplification module for energy amplification. However, the stability of the oscillation stage in the amplification system and The control of single frequency is more difficult, the system is more complicated, and the pulse width and waveform of the laser are completely determined by the oscillation level, which limits the width and shape of the amplified pulse waveform in the main amplification process

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