METHOD OF MAKING DEVICE FOR ELIMINATING REVERSED RAY IN FIBER-OPTIC GYROSCOPE Russian patent published in 2005 - IPC

FIELD: fiber optics.

SUBSTANCE: device can be used for producing fiber-optic gyros and fiber-optic transducers. W-shaped profile of refractivity distribution is formed in cross-section of light guide. Then biconic constriction is formed at the section of light guide to have taper angle α_c which exceed critical angle α_ca at some parts of light guide to form "glass-air"-type biconic constriction in the middle part of waveguide. Biconic constriction is housed inside quartz capillary. The rest part of capillary is filled with immersion composition having refractivity of n>n_e, where n_e is refractivity of external protective enclosure of light guide. After that the inner space of capillary is subject to sealing. Section of single-mode fiber is welded to section of multi-mode light guide the other end of which light guide is welded with section of quartz filament. The filament is made of 100% quartz glass covered with protective-strengthening coating having refractivity higher than refractivity of the quartz glass itself.

EFFECT: prolonged service life.

6 dwg