METHOD FOR MEASURING MODE SPOT DIAMETER FOR SINGLE-MODE OPTICAL FIBER

摘要

FIELD: optical instruments. SUBSTANCE: method involves measuring attenuation of optical beam at joint of tested and additional optical fibers, when mode spot diameter of additional fiber is known. Attenuation of optical beam at joint of tested and additional optical fibers is measured using inverse dissipation method in time span on two sides. Mode spot diameter of tested optical fiber conforms to condition W2t= W2a•10^-0,5(at^-aa⁾, where a_t,α_a are results of measurement of attenuation at joint of tested and additional optical fibers on side of tested and additional fibers, respectively; W_t,W_a are diameters of mode spot diameter of tested and additional fibers, respectively. EFFECT: simplified design of measurement, decreased error. 1 dwg