C. Sternkopf

Heterodyne interferometer laser source with a pair of two phase locked loop coupled He–Ne lasers by 632.8 nm

Eberhard Manske, Uwe Gerhardt, E. Manske, 2012 .

Interferometry for the Next Generation of Nanopositioning and Nanomeasuring Machines

T. Hausotte, B. Percle, G. Jäger, 2011 .

Frequency stabilization of an external-cavity diode laser by offset frequency looking to a stabilized He-Ne laser

Christian Sternkopf, Stefan Goellner, Eberhard Manske, 2014, Photonics Europe.

Digital frequency offset-locked He–Ne laser system with high beat frequency stability, narrow optical linewidth and optical fibre output

Christian Sternkopf, Eberhard Manske, E. Manske, 2018 .