Effect of Hydrostatic Pressure on the Optical Parameters of Fiber-Optic Cables for the Calibration System of the НТ-200 Neutrino Telescope

Abstract

The effect of hydrostatic pressure and its gradient on the optical parameters of fiber-optic cables for the calibration system of the НТ-200 Baikal neutrino telescope was investigated. The mean delay time of the light signal in the fiber-optic cables of the system is shown to be virtually constant at absolute pressures varying from 0 to 150 atm; incidentally, the average signal amplitude decreases by 5%. When the pressure difference changes from 0 to 7 atm, the average signal delay time increases by 0.5 ns, and the average signal amplitude decreases by 17%.