S. R. Abdullina, A. A. Vlasov, S. A. Babin, “Smoothing of the spectrum of fibre Bragg gratings in the Lloyd-interferometer recording scheme”, Kvantovaya Elektronika, 2010, Volume 40, Number 3,Pages <nobr>259

This article is cited in 6 papers

Fibre optics

Smoothing of the spectrum of fibre Bragg gratings in the Lloyd-interferometer recording scheme

S. R. Abdullina^ab, A. A. Vlasov^ab, S. A. Babin^ab

^a Novosibirsk State University
^b Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Sciences, Novosibirsk

Abstract: The possibility of apodization of fibre Bragg gratings (FBGs) recorded in the region of interference of the two parts of a Gaussian beam in a Lloyd interferometer is considered. The reflection spectra of FBGs are numerically simulated for different parameters of the recording beam and its displacement with respect to the dividing axis in the interferometer. Aconsiderable suppression of sidelobe resonances in the FBG spectrum during the displacement of the beam centre with respect to the dividing axis by half the beam radius is predicted and experimentally demonstrated. It is shown that this is caused by the equating of the mean value of the refractive index in the FBG region.

PACS: 42.25.Gy, 42.40.Eq, 42.81.Wg, 42.70.Nq

Received: 18.11.2009
Revised: 08.01.2010