Zhong Wenjia Elser née, Stiller Birgit, Elser Dominique, Heim Bettina, Marquardt Christoph, Leuchs Gerd
Opt Express. 2015 Oct 19;23(21):27707-14. doi: 10.1364/OE.23.027707.
By performing quantum-noise-limited optical heterodyne detection, we observe polarization noise in light after propagation through a hollow-core photonic crystal fiber (PCF). We compare the noise spectrum to the one of a standard fiber and find an increase of noise even though the light is mainly transmitted in air in a hollow-core PCF. Combined with our simulation of the acoustic vibrational modes in the hollow-core PCF, we are offering an explanation for the polarization noise with a variation of guided acoustic wave Brillouin scattering (GAWBS). Here, instead of modulating the strain in the fiber core as in a solid core fiber, the acoustic vibrations in hollow-core PCF influence the effective refractive index by modulating the geometry of the photonic crystal structure. This induces polarization noise in the light guided by the photonic crystal structure.
通过进行量子噪声限制的光学外差检测，我们观察到光在通过空芯光子晶体光纤（PCF）传播后出现偏振噪声。我们将噪声谱与标准光纤的噪声谱进行比较，发现尽管光在空芯PCF中主要在空气中传输，但噪声仍有所增加。结合我们对空芯PCF中声学振动模式的模拟，我们给出了一个关于由导波声子布里渊散射（GAWBS）变化引起的偏振噪声的解释。在这里，与实心芯光纤中调制纤芯应变不同，空芯PCF中的声学振动通过调制光子晶体结构的几何形状来影响有效折射率。这在光子晶体结构所引导的光中引起偏振噪声。
