Y waveguide integrated optical device(hereinafter referred to as Y waveguide)serves as the core component of fiber optic gyroscope(FOG),its reliability significantly effects the overall reliability of FOG.To quickly explore the reliability and life estimation of Y waveguide,highly accelerated life test(HALT)is used,and the influence of environmental factors(high temperature,rapid temperature chan-ges,high humidity)on Y waveguide performance is studied.The result shows that the high temperature will significantly affect the performance of Y waveguide.Y waveguide's upper operating temperature limit(UOTL)is 150 ℃ and upper damaging temperature limit(UDTL)is 130 ℃,insertion loss(IL)and splitting ratio are mainly effected factors.Y waveguide is placed at 120 ℃ for HALT,the life of Y waveguide is 1 120 h at 120 ℃,it is equivalent to 93 years at 25 ℃.According to the number of failure o-ver time,reliability bath curve is plotted.Reliability assessment and life estimation of Y waveguide are completed.
ReliabilityHighly accelerated life test(HALT)Y waveguideLife estimation
维普
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