Homogenized incoherent light source device

Abstract

The invention relates to a homogenized incoherent light source device. The device comprises an amplified spontaneous emission light source, a light beam coupling unit and a dodging light guide, wherein the amplified spontaneous emission light source, the light beam coupling unit and the dodging light guide are sequentially arranged in a light beam propagation direction, the light output by the amplified spontaneous emission light source is coupled to an input end face of the dodging light guide due to the arranged position and the arranged orientation, and the ratio of the length to the aperture of the dodging light guide is larger than or equal to a preset ratio, so that the size of the imaging formed by the light output by the amplified spontaneous emission light source at the output endface of the dodging light guide is larger than or equal to two times of the aperture of the dodging light guide. The homogenized incoherent light source device has the advantages of less dependence of beam uniformity on light source pumping uniformity, high utilization efficiency of a pumping light source and good uniformity of output two-dimensional flat-top beams, and is a homogenized incoherent light source with high efficiency-cost ratio and low difficulty in realization.

Description

technical field [0001] The invention belongs to the field of laser nuclear fusion lasers, and in particular relates to a homogenized incoherent light source device. Background technique [0002] Regardless of laser-plasma physics research, material damage testing, laser processing technology and other applications, it is expected to obtain a uniform irradiation close to the top-hat at the laser interface. Since the 1980s, the concept of induced incoherent beam homogenization has been introduced in the field of high-power lasers to suppress the coherent modulation of the beam from the spatial or frequency domain to obtain a smooth and uniform beam. The basic idea of ​​spatially induced incoherent technology (ISI: induced spatial incoherent) is to divide the laser beam into multiple sub-beams whose diffraction spot size is equivalent to the irradiation area. Since the transmission paths of each sub-beam are different, when each sub-beam When superimposed on a specific interfa...

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Problems solved by technology

[0006] On the one hand, the light source energy utilization efficiency of the scattered light homogenization scheme is low, and on the other hand, the ASE optical object hole homogenization scheme is dependent on the pumping uniformity of the light source (for the discharge pump laser, the uniformity of the discharge from the electrode) strong shortcomings, the present disclosure proposes a high-uniformity broadband incoherent light source device that utilizes light guide homogenization to amplify spontaneous radiation beams

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