G - Physics – 01 – J
Patent
G - Physics
01
J
73/58
G01J 1/16 (2006.01) G01M 11/00 (2006.01)
Patent
CA 2008799
LIGHT-REFLECTION METHOD FOR TRANSMISSION-LOSS MEASUREMENTS IN OPTICAL FIBER LIGHTGUIDES A B S T R A C T This method for transmission-loss measurements relates to the study of the optical properties of lightguides, being capable of being used in measuring tiny transmission losses in various types of optical fiber lightguides. Object - to increase versatility by way of providing the pos- sibility of making measurements in fast-response measuring sys- tems, where the lightguides are spliced together without an air gap, which is achieved through that a sounding light pulse is coupled into the lightguide being investigated, through an idle lightguide, whose length, ?x, is no less than half the length of the steady-state mode distribution for a given type of light- guide, measuring energy or maximum power, N0, of the pulse ref- lected from the output end face of the idle lightguide, connect- ing the idle lightguide and the one under investigation, measur- ing the energy or maximum power, N, of the radiation pulse ref- lected from the output end face of the lightguide under investi- gation, determining transmission losses, µ , within the light- guide under investigation, from the equation Image where, ? = length of the lightguide under investigation, ? = transmission factor of the spliced end face of the lightguides. Bibl. 2; Ill. 1.
Bukhshtab Mikhail A.
Leningradskoe Otdelenie Tsentralnogo Nauchno-Issledovatelskogo I
Marks & Clerk
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