An external cavity diode laser sensor

@article{Miles1983AnEC,
  title={An external cavity diode laser sensor},
  author={R O Miles and Anthony Dandridge and A. B. Tveten and T. G. Giallorenzi},
  journal={Journal of Lightwave Technology},
  year={1983},
  volume={1},
  pages={81-93}
}
A simple compact optical sensor system consisting of a near-field external cavity coupled to a semiconductor laser is reported. In this device, a change of phase in the light fed back into the laser cavity by the perturbed external mirror modulates the output of the laser by effectively changing the laser facet reflectivity. Phase shifts of9\cdot10^{-8}rad and 10-6rad were measured at 10 kHz and 100 Hz, respectively, using a 1-Hz bandwidth and a 98-percent reflector placed less than 10 μm from… CONTINUE READING

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