| 摘要 |
<p>The invention pertains to laser technology, fibre optics and integrated optics and has industrial applicability in the field of fibre optical and waveguide elements made from germano-silicate glass, in particular in fibre-optical Bragg and long-period gratings, dispersion compensators, integrated optical waveguides and so forth. The invention solves the problem of simplifying Raman fibre-optical lasers operating at wavelengths of 1.24 νm and 1.48 νm and enhancing the efficiency of the radiation conversion associated with Raman scattering. The 1.24 νm laser comprises a pumping source (1), a fibre-optical waveguide (2) containing 1-30 Mol % P2O5; sections of the fibre-optical waveguide containing 11-39 Mol % GeO2 form Bragg fibre-optical gratings (3, 4). The grating (3) forms an opaque dispersion mirror of an optical resonator for a first Stokes component, while the grating (4) is an output dispersion mirror for the same resonator; the first Stokes component issues at the output. In the 1.48 νm Raman fibre-optical laser, the second Stokes component issues at the output. The refractive index in the section of fibre-optical waveguide (11) is altered by directing 270-390 nm laser radiation (12) onto the section, said radiation passing through the protective polymer sheath of the fibre-optical waveguide (11).</p> |
