The effect of angular velocity-dependent Sagnac effect on speckle pattern images


Serbetci H., Ince E., NAVRUZ İ.

Journal of Optoelectronics and Advanced Materials, cilt.27, sa.9-10, ss.413-419, 2025 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27 Sayı: 9-10
  • Basım Tarihi: 2025
  • Dergi Adı: Journal of Optoelectronics and Advanced Materials
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex
  • Sayfa Sayıları: ss.413-419
  • Anahtar Kelimeler: Angular velocity, Correlation, Sagnac effect, Speckle pattern
  • Ankara Üniversitesi Adresli: Evet

Özet

In this study, a novel optical gyroscope design is proposed as an alternative to the conventional fiber optic gyroscope configuration. In the proposed design, a multimode optical fiber is used instead of a single-mode optical fiber. Multimode optical fibers produce a speckle pattern image at their output. It has been experimentally demonstrated that this design, which utilizes speckle pattern imaging captured by a CCD camera, can be employed to measure angular velocity. The detection of velocity is achieved through correlation analysis of the speckle pattern images observed at the output of the multimode fiber. Prior to the experimental study, the sensitivity of the speckle pattern emerging in the fiber cross-section to changes in angular velocity was simulated using the beam propagation method. Subsequently, all components of the proposed optical gyroscope system were assembled on a vibration-free optical table and tested at different angular velocities. Both simulation and experimental studies reveal that the speckle pattern images generated at the output of the multimode optical fiber can be utilized to measure changes in angular velocity.