|
In this paper, we present the LPFG fabrication using an optical filament splicer GPX- 3400 (Vytran) with tapering option where adiabatic, periodical tapers were fabricated by applying tensile stress to the fiber. The maximum range of the furnace movement is a few dozen millimeters from home position, therefore it is possible to apply the point-by-point method without introduction of additional, unnecessary stress. We used an “Omega”- shape filament to achieve homogenous structure of the tapers. Under this work, we have done the LPFGs on a commercial singlemode fiber SMF28 with the cladding’s diameter of 125 μm and the singlemode fiber Nufern 1550B-HP-80 with the cladding’s diameter up to 80 µm and polarization maintaining fiber PM1550-XP. A series of LPFG devices was fabricated with different periods and a total length of fiber grating depending on number of tapers. The analysis of attenuation bands was carried out by observing transmission spectrum in the range of 1200 nm to 1700 nm, whereas the fiber with LPFG was illuminated by a broadband light source. We obtained the optimum parameters of LPFG fabrication, separately for each types of the optical fibers.
|
