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In2Se3 nanosheets for harmonic mode-locked fiber laser

机译：in2Se3纳米片，用于谐波模式锁定光纤激光器

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摘要

Two-dimensional materials with a sheet structure have excellent optical, electrical and mechanical properties, and have attracted much attention in recent years, especially In2Se3 (the N-type semiconductor compound), which has a rapid development in the fields of materials science and optical communication. In this paper, the nonlinear saturation absorption characteristics of In2Se3 are studied. The In2Se3 nanosheet dispersion can be used in ultrafast photonics applications. The nonlinear absorption is measured by power dependent method, and the modulation depth and saturation intensity are 3.8% and 246.6 MW cm(-2), respectively. More importantly, In2Se3 is used as a saturable absorber (SA) in a passively mode-locked erbium-doped fiber laser. The proposed mode-locked fiber laser is demenstrated with a center wavelength of 1529.4 nm, a fundamental frequency of 5.9 MHz, a spectral width of 3.96 nm, a pulse width of 1.38 ps, and a signal-to-noise ratio of 55 dB. For the first time, harmonic mode-locking with a high-repetition rate of 431 MHz is achieved when the pump power is 360 mW corresponding to 73rd-order harmonic mode locking. It can be seen that In2Se3 is indeed a new excellent photonic material, which can be used in fiber optic communication, SAs photonics, laser material processing and light modulators.
机译：用片材结构体二维材料具有优异的光学，电气和机械性能，和而备受关注，近年来，特别是In2Se3（N型半导体化合物），其具有在材料科学和光学领域迅速发展沟通。在本文中，In2Se3的非线性饱和吸收特性进行了研究。该In2Se3纳米片分散在超快光子学应用中使用。非线性吸收由功率有关的方法测量，并且调制深度和饱和度强度是3.8％和246.6 MW厘米（-2），。更重要的是，In2Se3用作一个被动锁模掺铒光纤激光器的饱和吸收器（SA）。所提出的锁模光纤激光器demenstrated与1529.4纳米，5.9兆赫，3.96纳米，1.38皮秒的脉冲宽度的光谱宽度的基频，和一个信噪比为55 dB的中心波长。首次，当泵功率为360毫瓦对应于第73次高次谐波模式锁定谐波模式锁定以431兆赫的高重复率来实现的。它可以看出，In2Se3确实是一个新的优良的光子材料，其可以在光纤通信，SAS光子学，激光材料加工和光调制器中使用。

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