日本夏普公司研制成能低噪声工作的单模可见光半导体激光器,它以氧化铝为非晶硅,在谐振器的两端面镀上夹层的高反射膜,在提高光能密度的同时防止了谐振器内的返回光入射,抑制了噪声的产生.由于噪声电平降低了一个多数量级,因此光计测的精度也提高了十多倍. Japan’s Sharp Corporation developed low-noise work can be a single-mode visible light semiconductor laser, which uses aluminum oxide as amorphous silicon, both ends of the resonator coated sandwich high reflectivity film, to improve the optical density while preventing the resonator The return light incident inside suppresses the generation of noise, and the accuracy of the light measurement is more than tenfold, due to the fact that the noise level is reduced by more than one order of magnitude.