Yeom Dong-Il, Park Hyun Chul, Hwang In Kag, Kim Byoung Yoon
Division of Energy Systems Research, Ajou University, Yongtong-gu, Suwon, Korea.
Opt Express. 2009 Jun 8;17(12):9933-9. doi: 10.1364/oe.17.009933.
We demonstrate a coherent intermodal coupling in a hollow-core photonic bandgap fibers (PBGF) using an acoustic grating. A theoretical study on the properties of acoustic and optical wave propagating the PBGF is performed indicating that the applied frequency higher than 10 MHz is required to obtain the acousto-optic interaction at the wavelength around 1550 nm. Wavelength-tunable coupling from fundamental mode to higher-order core modes is achieved with more than 90% coupling efficiency at the applied frequency of 11.54 MHz. The low dispersive properties and the mode filed distributions of the higher-order guided modes of the air-core PBGF in the experiment show reasonable agreement with the simulation results.
我们利用声光栅在空心光子带隙光纤（PBGF）中展示了一种相干的多模耦合。对在PBGF中传播的声波和光波的特性进行了理论研究，结果表明，要在1550nm左右的波长处获得声光相互作用，所需的施加频率要高于10MHz。在11.54MHz的施加频率下，实现了从基模到高阶芯模的波长可调耦合，耦合效率超过90%。实验中空心PBGF高阶导模的低色散特性和模式场分布与模拟结果显示出合理的一致性。
