介绍了北京航空航天大学在光子晶体光纤陀螺技术方面的研究进展。在光纤研制方面，设计并拉制了适用于1550 nm高精度光纤陀螺的Φ110 μm细径实芯保偏光子晶体光纤和适用于850 nm小型化光纤陀螺的Φ100 μm超细径实芯保偏光子晶体光纤，突破了km级空芯光子晶体光纤的批量制备技术。在陀螺应用方面，干涉式实芯光子晶体光纤陀螺精度突破0.001（°）/h，实现了国际上光子晶体光纤陀螺的首次空间试验验证；干涉式空芯光子晶体光纤陀螺实现了优于0.4（°）/h的样机精度；同时还探索了空芯光子晶体光纤在谐振式光纤陀螺上的应用。

In this paper, the research progress of photonic crystal fiber optic gyroscope (PCFOG) is introduced based on the work carried out by Beihang University. In terms of optical fiber development, photonic crystal fibers (PCFs) with a diameter of Φ110 μm for 1550 nm high precision fiber optic gyroscope (FOG) and superfine solid core polarization-maintaining PCFs with diameter of Φ100 μm for 850 nm miniaturized FOG have been designed and fabricated. The batch preparation technology of km-level hollow core photonic crystal fibers has been broken through. In terms of gyroscope applications, the accuracy of the interferometric fiber optic gyroscope with solid-core photonic crystal fibers has reached 0.001 (°)/h, and the application in spacecraft has realized for the first time worldwide to our knowledge. The hollow-core interferometric PCFOG prototype with the prototype accuracy of 0.4 (°)/h has been fulfilled. Meanwhile, the application of hollow-core PCF in resonant fiber optic gyroscope has also been investigated.