Chemical effects on the fatigue of lightguide fibers

The effect of ions in solution on the stress assisted mechanical corrosion of high strength lightguide fibers is compared to the rate of crack growth in bulk silica. This review shows that the mechanical corrosion of bulk silica is apparently insensitive to ions in solution, whereas, fatigue of uncoated lightguide fiber is ion sensitive. These observations are discussed with respect to long term mechanical reliability.