All-optical tunable microfiber knot resonator with graphene-assisted sandwich structure
All-optical tunable microfiber knot resonator with graphene-assisted sandwich structure
复制标题
石墨烯辅助夹层结构的全光可调谐微纤维结谐振器
DOI：
10.1364/oe.25.018451
复制
发表时间：
2017-07-24
期刊：
影响因子：
3.8
通讯作者：
Tian, Yonghui
中科院分区：
文献类型：
--
作者：
Meng, Yinghao;Deng, Lin;Tian, Yonghui
我们利用外部垂直入射泵浦激光，通过直接光-石墨烯相互作用，展示了一种全光可调谐微光纤结谐振器（MFKR）。采用1530 nm连续波泵浦源照射样品，通过可饱和吸收效应、光热效应和光学克尔效应分别实现MFKR的传输损耗、消光比和谐振波长等性能调制。与只有底部石墨烯薄膜的MFKR相比，传输损耗和消光比的可调谐范围分别增加了69倍和125倍，可以诱导显著的幅度调谐。在泵浦光的照射下，MFKR的谐振波长发生红移，且红移范围可超过一个自由光谱范围（FSR），这意味着可以在光纤透明窗口的全波长范围内调谐谐振波长。该器件有望应用于全光调制器、可调谐滤光片等(C) 2017 optical Society of America
We demonstrate an all-optical tunable microfiber knot resonator (MFKR) by direct light-graphene interaction using external vertical incidence pump laser. The 1530 nm CW pump source is employed to irradiate the sample, which can achieve the performance modulation of MFKR including transmission loss, extinction ratio, and resonant wavelength by the saturable absorption, photo-thermal, and optical Kerr effects, respectively. Compared with the MFKR with only the bottom graphene film, the tunable ranges of transmission loss and extinction ratio are increased by 69 and 125 times, respectively, which can induce a remarkable amplitude tuning. The resonant wavelength of MFKR occurs a red-shift under the irradiation of the pump light, and the red-shift range can exceed one free spectral range (FSR), which means the resonant wavelength could be tuned in the full wavelength range of the transparent window of optical fiber. It is promising for the device to be applied as an all-optical modulator, tunable optical filter, etc. (C) 2017 Optical Society of America