Lau Kuen Yao, Pyymaki Perros Alexander, Li Diao, Kim Maria, Sun Zhipei
Department of Electronics and Nanoengineering, Aalto University, Tietotie 3, 02150 Espoo, Finland.
Nanoscale. 2021 Jun 3;13(21):9873-9880. doi: 10.1039/d0nr08784j.
Recently, graphene electro-optical modulators have emerged as a viable alternative to the conventional modulators due to their broadband operation, ultrafast responsivity, small footprint, and low energy consumption. Here, we report scalable graphene electro-optical modulators for all-fibre pulsed laser applications. An actively Q-switched all-fibre laser is demonstrated with a scalable graphene electro-optical modulator for the first time, which is different from the previously reported work that typically implemented graphene electro-optical modulators in a free-space optical system. Our electrically modulated actively Q-switched fibre laser outputs at the centre wavelength of ∼1961.9 nm, the tunable repetition rate of 56.5 to 62.5 kHz, the maximum pulse energy of ∼80 nJ, and the signal-to-noise ratio of ∼46.6 dB. This work demonstrates that the scalable all-fibre integrated graphene electro-optical modulator approach is promising for producing pulsed fibre lasers at 2 μm with high performance and easy integration which are useful in various applications such as medical treatment, material processing, and spectroscopy.
最近，石墨烯电光调制器因其宽带运行、超快响应速度、小尺寸和低能耗，已成为传统调制器的一种可行替代方案。在此，我们报道了用于全光纤脉冲激光应用的可扩展石墨烯电光调制器。首次展示了一种采用可扩展石墨烯电光调制器的主动调Q全光纤激光器，这与之前报道的通常在自由空间光学系统中实现石墨烯电光调制器的工作不同。我们的电调制主动调Q光纤激光器在中心波长约1961.9 nm处输出，可调重复频率为56.5至62.5 kHz，最大脉冲能量约80 nJ，信噪比约46.6 dB。这项工作表明，可扩展的全光纤集成石墨烯电光调制器方法有望用于高效生产2μm的脉冲光纤激光器，且易于集成，可用于医疗、材料加工和光谱学等各种应用。
