Application of the Fourier transform to fibre-optic sensor recognition.

• Autorzy: Merta, I. , Jaroszewicz, L. , Kieżun, A.
• Języki publikacji: EN

Abstrakty

EN

The construction of the fibre-optic sensor of external perturbations and results of the relevant studies are presented. As a sensor head, the sample of two-mode optical fiber is used. Changes of intermodal interference condition, caused by external perturbation, generated changes of output speckle pattern. This output has been considered as an intensity image and diffraction method has been applied for its recognition. For this reason, the ring-wedge photodetector has been placed in the Fourier plane of the image studied. The digital signal generated by this detector has been processed by software neural network. As a result of a suitable process of network training, a possibility o recognizing the perturbation has emerged, which made it possible to avoid troublesome analysis of intermode interactions.

• Czasopismo: Optica Applicata
• Rocznik: 1999
• Tom: Vol. 29, nr 1-2
• Strony: 171-179
• Opis fizyczny: Bibliogr. 9 poz., rys. 8

Twórcy

autor

Merta, I.

autor

Jaroszewicz, L.

autor

Kieżun, A.

• Institute of Applied Physics, military University of Technology, ul. Kaliskiego 2, 00-908 Warszawa, Poland