Novel bicrystal tandem connection dual-wavelength laser

Abstract

The invention discloses a novel bicrystal tandem connection dual-wavelength laser, and relates to the field of electronic devices, in particular to the field of full-solid dual-wavelength lasers. Dual-wavelength lasers are simultaneously output through a same light path, wherein dual wavelengths include the first wavelength of sigma polarization and the second wavelength of pi polarization. The laser mainly comprises an anisotropy laser crystal, a pumping source for generating the inversion particle number through the laser crystal and a dual-wavelength laser resonance cavity for achieving dual-wavelength oscillating. The novel cross-polarization dual-wavelength laser serves as a novel laser source, the technological difficulty of high-conversion-efficiency and high-light-beam-quality linear polarization dual-wavelength laser output is overcome, a novel technological approach is provided for obtaining high-power and high-coherent-terahertz radiation, application of cross-polarization dual-wavelength laser light is expanded, and the wide market application prospect is obtained in the fields such as laser communication.

Description

technical field [0001] The invention is a novel dual-wavelength laser, which realizes a solid-state dual-wavelength laser whose output dual-wavelength polarization state is orthogonal polarization, and belongs to the field of optoelectronic devices. Background technique [0002] Solid-state dual-wavelength lasers are widely used in optical computing, laser remote sensing, nonlinear crystal frequency conversion, and resonance holographic interference. In particular, the nonlinear frequency conversion technology is used to perform frequency difference at the back end of the online polarization dual-wavelength laser to achieve terahertz radiation. , has received extensive attention from researchers at home and abroad in recent years. For example, Nd:YAG is used to achieve 1319nm / 1338nm dual-wavelength laser output, and nonlinear crystals such as DAST are used at the back end to achieve 3.23THz terahertz radiation. Significant research results have been achieved. Therefore, the...

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Problems solved by technology

The disadvantage of the dual-wavelength laser realized by the former method is that it is limited by the gain linewidth, and the frequency difference of the obtained orthogonally polarized dual-wavelength laser can only reach the limit of the gain linewidth of the solid-state laser at most; The main disadvantage of the laser is that the utilization rate of the pumping light by the laser resonator is relatively low. When a polarizing device is added, only one kind of laser can be guaranteed to oscillate, and the other kind of laser will have a loss effect, making the output dual-wavelength laser power relatively low. Moreover, under the action of the pumping source of the laser crystal in the resonator, the temperature of the crystal on the side close to the pumping source will be higher than that of the crystal on the side away from the pumping source, resulting in the gradient and strain of the axial temperature of the laser crystal The distribution is uneven, resulting in a relatively obvious laser crystal thermal lens effect, increasing the loss in the cavity, and the pumping light-laser conversion efficiency of the resonator is low, and the beam quality of the output laser will also be reduced.

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