Yasuji Hattori

Optical fiber identification system using fiber Bragg gratings

Summary form only given. In this paper, we present a new identification method that uses identification-numbered (ID-numbered) fiber devices. The ID-numbered fiber devices consist of a combination of fiber Bragg gratings (FBGs) having various reflection wavelengths.

Improved erbium-doped fiber amplifiers employing chirped fiber gratings as ASE rejection filters for WDM transmission

Summary form only given. In summary, we have developed the chirped fiber grating optimisation as amplified spontaneous emission (ASE) rejection filters in Er-doped fiber amplifiers (EDFAs), and confirmed a significant improvement in the optical SNR in WDM transmission by simulations and experiments.

Modulation Transfer Function (MTF) Measurement of Silica Glass Image Fiber

When an image is transmitted by an image fiber, the image quality at the exit end of the fiber generally deteriorates in relation to the size of each picture element, the misalignment of each picture element, optical power coupling (leakage) between adjacent picture elements and defects in the picture elements.

Radiation-resistant characteristics of image fiber

γ ray irradiated characteristics of radiation resistant image fiber was mainly studied, and also core material and cladding material were investigated. We have got the following result.