Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China.
Opt Lett. 2009 Dec 1;34(23):3683-5. doi: 10.1364/OL.34.003683.
We report the implementation of an in-fiber optical switch by means of filling a fluid into the air holes of a photonic crystal fiber with a fiber Bragg grating. Such a switch can turn on/off light transmission with an extinction ratio of up to 33 dB within a narrow wavelength range (Bragg wavelength) via a small temperature adjustment of +/-5 degrees C. The switching function is based on the temperature-dependent coupling between the fundamental core mode and the rod modes in the fluid-filled holes resulting from the thermo-optic effect of the filled fluid.
我们报告了一种通过在光纤布拉格光栅的空气孔中填充液体来实现光纤内光开关的方法。这种开关可以通过在小的温度范围内（±5 摄氏度）进行调整，在很窄的波长范围内（布拉格波长）实现高达 33dB 的消光比来打开/关闭光传输。这种开关功能基于填充液体的热光效应引起的填充孔中基模和棒模之间的温度相关耦合。
