Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology , Soochow University , Suzhou 215123 , People's Republic of China.
Department of Materials Science and Engineering, and ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) , Monash University , Clayton , Victoria 3800 , Australia.
ACS Appl Mater Interfaces. 2018 Jun 27;10(25):21534-21540. doi: 10.1021/acsami.8b03045. Epub 2018 Jun 13.
A multilayer platinum diselenide (PtSe) film was experimentally demonstrated as a new type of saturable absorber with the capability to deliver robust dissipative solitons in a passively mode-locked fiber laser. The PtSe film synthesized by chemical vapor deposition was placed onto the ferule of a single mode optical fiber through a typical dry transfer process. The nonlinear optical measurements reveal efficient saturable absorption characteristics in terms of a large modulation depth (26%) and low saturable intensity (0.346 GW cm) at the wavelength of 1064 nm. An all-fiber ring cavity was built, in which the PtSe film was sandwiched between two ferules as the saturable absorber and Ytterbium-doped fiber was used as the optical gain medium. Robust dissipative soliton pulses with a 3 dB spectral bandwidth of 2.0 nm and a pulse duration of 470 ps centered at 1064.47 nm were successfully observed in the normal dispersion regime. Moreover, our mode-locked lasers also exhibit good long-term stability. Our finding suggests that multilayer PtSe may find potential applications in nonlinear optics and ultrafast photonics.
实验证明，多层铂硒化物（PtSe）薄膜是一种新型可饱和吸收体，可在被动锁模光纤激光器中产生稳健的耗散孤子。通过典型的干法转移工艺，将化学气相沉积法合成的 PtSe 薄膜放置在单模光纤的套圈上。在 1064nm 波长处，非线性光学测量显示出有效的可饱和吸收特性，调制深度大（26%），饱和强度低（0.346GW/cm）。构建了一个全光纤环形腔，其中 PtSe 薄膜夹在两个套圈之间作为可饱和吸收体，掺镱光纤作为光增益介质。在正常色散区成功观察到中心波长为 1064.47nm、3dB 光谱带宽为 2.0nm、脉冲持续时间为 470ps 的稳健耗散孤子脉冲。此外，我们的锁模激光器还表现出良好的长期稳定性。我们的发现表明，多层 PtSe 可能在非线性光学和超快光子学中有潜在的应用。
