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A brief review is given of the state of the art in the research on the photosensitivity of fibres and photoinduced fibre gratings. The most important properties of fibre gratings are considered and… (More)
- Olivier Deparis, Roman V. Kiyan, +4 authors Evgueni M. Dianov
- Optics letters
- 2001
We have fabricated bandpass filters based on pi-shifted long-period gratings for application in actively mode-locked erbium fiber lasers. Introducing the pi-phase shift in the middle of the grating… (More)
The characteristics of a device developed for measuring the angular distribution of the intensity of the output radiation of optical fibers in the far field are described. The device’s angular… (More)
An all-fibre Er-doped laser emitting linearly polarised radiation is built. The laser uses a long-period fibre grating as a polarisation-dependent absorbing filter. The use of such an intracavity… (More)
The method of optical space-domain reflectometry for measuring local spatial characteristics of fibre Bragg gratings (FBGs) is described in detail. It is demonstrated experimentally that, by using IR… (More)
- I. G. Korolev, Sergei A. Vasiliev, +5 authors Ernst Brinkmeyer
- 2001
OSDR techniques for spatial characterization of fiber Bragg gratings based on local phase induction by IR or UV radiation have been developed. Both radiation types provide longitudinally and… (More)
The fabrication of π-shifted long-period gratings is reported. Such gratings exhibit a pass band within their core-cladding mode resonance peaks. Their application as filters in actively mode-locked… (More)
The influence of diffusion of molecular hydrogen used to write fibre gratings on the spectral characteristics of the gratings is discussed in detail. It is shown that the additional waveguide… (More)
An automated experimental setup for investigating the mechanisms of refractive index change in optical fibers at high temperatures is described. A resistive furnace that allows a section of an… (More)