Chah Karima, Linze Nicolas, Caucheteur Christophe, Mégret Patrice, Tihon Pierre, Verlinden Olivier, Sulejmani Sanne, Geernaert Thomas, Berghmans Francis, Thienpont Hugo, Wuilpart Marc
Service d’Electromagnétisme et de Télécom, Faculté Polytechnique de Mons, Bld Dolez 31, 7000 Mons, Belgium.
Appl Opt. 2012 Sep 1;51(25):6130-8. doi: 10.1364/AO.51.006130.
A new type of highly birefringent microstructured optical fiber has been tested for vibration measurements using a polarimetric technique. This technique takes advantage of the stress-induced phase shift between the two orthogonally polarized fiber eigenmodes. Comparison of three different fiber types shows that standard single-mode fibers do not provide stable measurements and that conventional polarization-maintaining fibers lead to a significant cross-sensitivity to temperature. However, for highly birefringent microstructured fibers specifically designed to provide a temperature-independent birefringence, our experiments show repeatable vibration measurements over a frequency range extending from 50 Hz to 1 kHz that are unaffected by temperature variations (up to 120 °C).
一种新型的高双折射微结构光纤已通过偏振技术进行了振动测量测试。该技术利用了两个正交偏振光纤本征模之间应力诱导的相移。对三种不同光纤类型的比较表明，标准单模光纤无法提供稳定的测量结果，而传统的保偏光纤会导致对温度有显著的交叉敏感性。然而，对于专门设计用于提供与温度无关的双折射的高双折射微结构光纤，我们的实验表明，在50 Hz至1 kHz的频率范围内，振动测量结果具有可重复性，且不受温度变化（高达120°C）的影响。
