techniques can be considered as an attractive alternative to the often-cumbersome traditional manufacturing routes. With the use of high-power lasers, localized hot zones that are necessary for glass making can be obtained rapidly. For instance, Laser-Powder-Deposition enables rapid fabrication of short, high gain fibers used in e.g., distributed feedback fiber lasers (DFFL). DFFLs offer sought after performance suitable for a broad range of applications in modern photonics i.e., superior stability and narrower, single-frequency linewidth compared to conventional fiber lasers. Tunable, narrow laser sources with output in eye-safe spectrum are desired for sensing, signal multiplexing, LIDAR systems, quantum applications etc. In this work we present DFFL obtained using Laser-Powder-Deposition made Er-doped silica fiber. Milliwatt level, narrow line lasing (< 704 kHz, equipment limited) was obtained using a phaseshifted grating written in 16 mm long fiber. The backward slope efficiency was as high as 24% when pumping at 976 nm. The results presented in this work showcase new possibilities in fiber fabrication that were unlocked through laser-assisted additive manufacturing. This fiber laser sets the stage for the future of rapid fabrication of advanced fiber devices through unconventional manufacturing routes.
Tellurite glass rods with nanodiamonds as photonic magnetic field and temperature sensors
我们提出的混合材料的碲酸盐玻璃棒掺杂含有氮空位氮和顺磁氮空位色心的纳米金刚石组成的工作结果。报道的结果包括详细的碲酸盐玻璃和甘蔗制造，共焦和宽场成像的纳米金刚石分布在他们的体积，以及他们的荧光和光学检测磁共振测量的磁场和温度的光谱表征。磁场高达50 G进行了检查，灵敏度为10 $^{-5}$ T Hz $^{-1/2}$，而温度测量同时进行，灵敏度为74 kHz K $^{-1}$在8开尔文范围内，在室温下。通过这种方式，我们证明了这种系统的适用性，光纤磁和温度测量具有合理的性能已经在玻璃棒的形式。与此同时，杆构成了一个有趣的起点，用于进一步加工成光子组件，如微结构光纤或光纤锥，以实现专门的传感模式。
Sub-kHz linewidth integrated extended-DBR Pockels lasers using lithium tantalate
Institute of Physics, Swiss Federal Institute of Technology Lausanne (EPFL)（洛桑联邦理工学院物理研究所）；Deeplight SA（Deeplight公司）；State Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences（中国科学院上海微系统与信息技术研究所集成电路材料重点实验室）；Institute of Electrical and Micro engineering, Swiss Federal Institute of Technology, Lausanne (EPFL)（洛桑联邦理工学院电气与微电子工程研究所）
