An orthogonally polarized dual-wavelength laser emitting at 542 nm and 543 nm was proposed and demonstrated. The laser was based on a single Nd:YVO₄ crystal and two MgO:PPLN crystals. An optical-to-optical (O-O) efficiency as high as 15.3% was achieved when the powers of the two emission wavelengths were equal. The long-term power stability was 4.5% for 542 nm and 3.5% for 543 nm, respectively. The Laser speckle contrast ratio (SCR) was also measured as a function of power ratio of the two emission wavelengths. The measured SCR values agreed with theoretical simulations with a difference less than 5%.

中文翻译：

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正交偏振双波长Nd：YVO ₄ / MgO：PPLN腔内倍频绿色激光

提出并证明了在542 nm和543 nm处发射的正交偏振双波长激光器。激光器基于单个Nd：YVO ₄晶体和两个MgO：PPLN晶体。当两个发射波长的功率相等时，可实现高达15.3％的光对光（OO）效率。542 nm和543 nm的长期功率稳定性分别为4.5％和3.5％。还测量了激光散斑对比度（SCR）作为两个发射波长的功率比的函数。SCR的实测值与理论模拟结果相符，相差小于5％。