The effect of laser radiation with a wavelength near 1.55 µm on the photoluminescence properties of “nitrogen-vacancy” (NV) color centers in diamond has been studied experimentally. The effect of radiation of an infrared laser on the charge state of color centers redistributes the spectral intensity of photoluminescence in the ensemble of NV centers. In the case of neutral NV centers, the quenching of photoluminescence reaching about 60% has been observed. A feature of the laser excitation of NV centers by this method is the absence of competition with stimulated emission and two-photon excitation, which is observed with an increase in the power of infrared radiation at other wavelengths.

实验研究了波长在1.55 µm附近的激光辐射对金刚石中“氮空位”（NV）颜色中心的光致发光特性的影响。红外激光辐射对色心的电荷状态的影响会重新分布NV中心集合中的光致发光光谱强度。在中性NV中心的情况下，已经观察到达到约60％的光致发光猝灭。通过这种方法对NV中心进行激光激发的一个特征是，没有与激发发射和双光子激发竞争，这可以通过其他波长的红外辐射功率的增加来观察到。