most citedTracking length and differential wavefront sensing signals from quadrant photodiodes in heterodyne interferometers with digital phase-locked loop readout

40 citations · 40 across the 1 of their papers we have counts for

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physics.ins-det2020★ 40 cited

Tracking length and differential wavefront sensing signals from quadrant photodiodes in heterodyne interferometers with digital phase-locked loop readout

Gerhard Heinzel, Miguel Dovale Álvarez, Alvise Pizzella +2

We propose a method to track signals from quadrant photodiodes (QPD) in heterodyne laser interferometers that employ digital phase-locked loops for phase readout. Instead of separa…