@article{oai:niigata-u.repo.nii.ac.jp:00001532,
 author = {Suzuki, Takamasa and Kobayashi, Katsuyuki and Sasaki, Osami},
 issue = {16},
 journal = {Applied Optics, Applied Optics},
 month = {Jun},
 note = {A two-wavelength interferometer that uses two separate modulating currents with different phases but the same frequencies to detect a greater degree of object displacement in real time is proposed and demonstrated. The measurement error was 57 nm, roughly 1/80 of the synthetic wavelength. We have confirmed that this modulating technique enables us to equip our prototype interferometer with a simple feedback-control system that eliminates external disturbance.},
 pages = {2646--2652},
 title = {Real-time displacement measurement with a two-wavelength sinusoidal phase-modulating laser diode interferometer},
 volume = {39},
 year = {2000}
}