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градиентный световод stresses
cables	graded-index fiber (MichaelBurov); graded-index fibre (MichaelBurov); graded-index optical fiber (MichaelBurov); graded-index optical fibre (MichaelBurov); graded-index optic fiber (MichaelBurov); graded-index optic fibre (MichaelBurov)
el.	gradient guide
house.	graded index fiber; graded index lightguide; graded index waveguide
nano	graded-index guide
quant.el.	gradient guide (световод с поперечным градиентом показателя преломления)
tech.	gradient light guide
telecom.	gradient light conductor

градиентный световод: 3 phrases in 3 subjects

Household appliances	1
Mass media	1
Physics	1