Deep phase modulation interferometry. Academic Article uri icon


  • We have developed a method to equip homodyne interferometers with the capability to operate with constant high sensitivity over many fringes for continuous real-time tracking. The method can be considered as an extension of the "J1 . . .J4" methods, and its enhancement to deliver very sensitive angular measurements through Differential Wavefront Sensing is straightforward. Beam generation requires a sinusoidal phase modulation of several radians in one interferometer arm. On a stable optical bench, we have demonstrated a long-term sensitivity over thousands of seconds of 0.1 mrad/Hz that correspond to 20 pm/ Hz in length, and 10 nrad/ Hz in angle at millihertz frequencies.

published proceedings

  • Opt Express

altmetric score

  • 3.75

author list (cited authors)

  • Heinzel, G., Guzmn Cervantes, F., Garca Marin, A. F., Kullmann, J., Feng, W., & Danzmann, K.

citation count

  • 23

complete list of authors

  • Heinzel, Gerhard||Guzmán Cervantes, Felipe||García Marin, Antonio F||Kullmann, Joachim||Feng, Wang||Danzmann, Karsten

publication date

  • August 2010