Highly sensitive dynamic strain measurements by locking lasers to fiber Bragg gratings.

@article{Lissak1998HighlySD,
  title={Highly sensitive dynamic strain measurements by locking lasers to fiber Bragg gratings.},
  author={Boaz Lissak and Ady Arie and Moshe Tur},
  journal={Optics letters},
  year={1998},
  volume={23 24},
  pages={1930-2}
}
A novel, sensitive, simple, and robust strain interrogation technique is analyzed and experimentally tested. By locking a laser wavelength to the midreflection wavelength of a standard fiber Bragg grating and measuring the error signal, we achieve high dynamic strain sensitivity of 45 picostrain/ radicalHz rms at 3 kHz, where the dominant noise in the experiment is the laser frequency noise. 
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