摘要 : The operation of single- and multipoint active fiber sensors for both strain and temperature measurements is reported. An active fiber source consists of a pair of wavelength-matched Bragg gratings formed in a rare earth doped fib... 展开 The operation of single- and multipoint active fiber sensors for both strain and temperature measurements is reported. An active fiber source consists of a pair of wavelength-matched Bragg gratings formed in a rare earth doped fibre, and when, optically pumped, lase in a narrow bandwidth around the Bragg wavelength. The primary advantage of an active sensor over a passive sensor is a significant increase in signal-to-noise ratio. 收起