Low-noise laser

The utility model discloses a low-noise laser, which comprises a first pumping source, a first solid gain medium, a first birefringent crystal, a second pumping source, a second solid gain medium and a second birefringent crystal, the first oscillation light path sequentially penetrates through the first pumping source, the first shaping system, the first solid gain medium and the first birefringent crystal to be projected to the polarization beam splitter, and the second oscillation light path sequentially penetrates through the second pumping source, the second shaping system, the second solid gain medium and the second birefringent crystal to be projected to the polarization beam splitter. And the polarizing beam splitter guides the first oscillation light path and the second oscillation light path into the nonlinear crystal and projects the light into the laser cavity mirror. According to the utility model, the two pumping sources are used for pumping the two same solid gain media and are matched with the