Wang Fang, Lan Dongfang, Zhang Xuenan, Cheng Tonglei
State Key Laboratory of Synthetical Automation for Process Industries, the College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China.
Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao, 066004, China.
Nanoscale. 2021 Oct 14;13(39):16608-16614. doi: 10.1039/d1nr04361g.
Titanium nitride (TiN) with outstanding physical and chemical properties has earned considerable attention. However, few studies have been conducted on the ability of TiN in the ultrafast photonics field. In this study, ultrafast fiber lasers operating at 1.5 and 2 μm were realized using TiN nanoparticles (NPs) deposited onto a D-shaped fiber (DF) as the optical modulator. TiN NPs were synthesized a reduction-nitridation route. As the TiN-DF saturable absorber (SA) was integrated into the erbium-doped fiber laser (EDFL) and thulium-doped fiber laser (TDFL) cavities, femtosecond pulses of 1532 nm and 1960 nm were obtained with high performance. To the best of our knowledge, the mode-locked fiber laser operating around 1530 nm was realized for the first time. Interestingly, TiN-DF SA in the TDFL could be used as a temperature sensitive device, and a novel temperature sensor was proposed with the sensitivity of 88 pm °C. Our results verified that TiN-DF modulators are excellent nonlinear optical devices for ultrafast photonic applications.
具有出色物理和化学性质的氮化钛（TiN）已引起了广泛关注。然而，关于TiN在超快光子学领域能力的研究却很少。在本研究中，通过将沉积在D形光纤（DF）上的TiN纳米颗粒（NPs）用作光调制器，实现了工作在1.5和2μm的超快光纤激光器。TiN NPs通过还原氮化路线合成。当将TiN-DF饱和吸收体（SA）集成到掺铒光纤激光器（EDFL）和掺铥光纤激光器（TDFL）腔中时，获得了高性能的1532nm和1960nm飞秒脉冲。据我们所知，首次实现了工作在1530nm左右的锁模光纤激光器。有趣的是，TDFL中的TiN-DF SA可以用作温度敏感器件，并提出了一种灵敏度为88 pm/°C的新型温度传感器。我们的结果证实，TiN-DF调制器是用于超快光子应用的优异非线性光学器件。
