Lindner Lukas, Hahl Felix A, Luo Tingpeng, Antonio Guillermo Nava, Vidal Xavier, Rattunde Marcel, Ohshima Takeshi, Sacher Joachim, Sun Qiang, Capelli Marco, Gibson Brant C, Greentree Andrew D, Quay Rüdiger, Jeske Jan
Fraunhofer Institute for Applied Solid State Physics IAF, Tullastraße 72, 79108 Freiburg im Breisgau, Germany.
Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge CB3 0HE, UK.
Sci Adv. 2024 Sep 27;10(39):eadj3933. doi: 10.1126/sciadv.adj3933.
Diamond is a potential host material for laser applications due to its exceptional thermal properties, ultrawide bandgap, and color centers, which promise gain across the visible spectrum. More recently, coherent laser methods offer improved sensitivity for magnetometry. However, diamond fabrication is difficult in comparison to other crystalline matrices, and many optical loss channels are not yet understood. Here, we demonstrate a continuous-wave laser threshold as a function of the pump intensity on nitrogen-vacancy (NV) color centers. To achieve this, we constructed a laser cavity with both an NV diamond medium and an intracavity antireflection-coated diode laser. This dual-medium approach compensates intrinsic losses of the cavity by providing a fixed additional gain below threshold of the diode laser. We observe a continuous-wave laser threshold of the laser system and linewidth narrowing with increasing green pump power on the NV centers. Our results are a major development toward coherent approaches to magnetometry.
由于其卓越的热性能、超宽带隙和色心，金刚石是激光应用的潜在基质材料，有望在可见光谱范围内实现增益。最近，相干激光方法提高了磁力测量的灵敏度。然而，与其他晶体基质相比，金刚石制造困难，许多光损耗通道尚未被理解。在这里，我们展示了连续波激光阈值与氮空位（NV）色心泵浦强度的函数关系。为实现这一点，我们构建了一个包含NV金刚石介质和腔内镀有抗反射膜的二极管激光器的激光腔。这种双介质方法通过在二极管激光器阈值以下提供固定的额外增益来补偿腔的固有损耗。我们观察到激光系统的连续波激光阈值以及随着NV中心绿色泵浦功率增加线宽变窄。我们的结果是磁力测量相干方法的一项重大进展。
