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fractional laser frequency stability with a 7-cm unequal-arm Mach-Zehnder interferometer
Victor Huarcaya, Miguel Dovale Álvarez, Daniel Penkert +7
To achieve sub-picometer sensitivities in the millihertz band, laser interferometric inertial sensors rely on some form of reduction of the laser frequency noise, typically by lock…
Characterization and evasion of backscattered light in the squeezed-light enhanced gravitational wave interferometer GEO 600
Fabio Bergamin, James Lough, Emil Schreiber +15
Squeezed light is injected into the dark port of gravitational wave interferometers, in order to reduce the quantum noise. A fraction of the interferometer output light can reach t…
Deep phase modulation interferometry
Gerhard Heinzel, Felipe Guzmán Cervantes, Antonio F. García Marín +3
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…
Real-time phasefront detector for heterodyne interferometers
Felipe Guzmán Cervantes, Gerhard Heinzel, Antonio F. García Marín +4
We present a real-time differential phasefront detector sensitive to better than 3 mrad rms, which corresponds to a precision of about 500 pm. This detector performs a spatially re…