Abstract
In this study, an excellent polarization optical crystal LiNa5Mo9O30 with wide transmission range and high laser damage threshold was researched in detail. The laser damage threshold of the LiNa5Mo9O30 crystal was measured to be 2.64 GW/cm2, which was the highest among polarized optical crystals. The birefringence in the range of 0.435–5 μm was larger than 0.14, while the wedge angle between 31.94° and 32.12° would satisfy the application in this waveband. The extinction ratio of the fabricated prism with the wedge angel of 31.09° was larger than 15,000:1. The results show that the LiNa5Mo9O30 prism is an excellent polarization device, especially in the mid-infrared range and high-power applications.
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