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Światłowód pierścieniowy domieszkowany neodymem.

Dorosz D.

Szkło i Ceramika

2006

R. 57, nr 2

14-18

Signal processing, device oriented, ring-index fibers have a unique capability of transmitting either quasi planar modes for large ring diameters or the second order mode in a quasi single-mode regime at lossy discrimination of the fundamental mode, for small ring diameters. Ring-index fibres can maintain single mode transmission for considerable values of normalized frequency for particular cases of the refractive index profile. Theoretically predicted features of ring index fibres were confirmed experimentally on the samples manufactured by the author. The ring shape of doped rare earth core gives possibility to stimulate luminescence from inside of the fibre. In this paper the ring core doped Nd3+ ions fibre is reported. The analysis of dependences between parameters of core on light propagation in ring-core optical fibers is presented. The ring core is made from silica glasses doped by Nd3+ ions.

Ring core fibre as an optical amplifier

Dorosz J.

Optica Applicata

2004

Vol. 34, nr 4

515-530

The ring shape of doped rare earth fibre (M-profile fibre) offers the possibility of stimulating luminescence from inside of the fibre with higher efficiency of coupling. In this type of fibre, the inner and outer claddings have lower than the ring core refraction index. The pump light is guided by the multimode inner cladding and the laser light is guided by the doped rare earth ions ring-core. The pump absorption is almost complete because of the geometry of that kind of fibre construction. In this paper, a ring coredoped Dy3+ ionsfibre is presented. In the first part of this report, an analysis of light transfer between inner cladding and ring-core optical fibre is presented. In the second part, the parameters of Dy3+ions doped ring core optical fibre manufactured by author are described. It seems that this kind of fibre may be used for optical amplifier construction.