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Polarisation fluctuation in optical-fibre submarine cable under 8000 m deep sea environmental conditions (hydraulic pressure of 80 MPa, tensile force of 50 kN and temperature of 3°C) are presented. It is found that the frequency spectrum of polarisation fluctuation is less than about 2 kHz in dynamic stress conditions.
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Namihira et al. (1987) studied this question.
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