Electro-optic modulators (EOMs) are efficient and easy to use tools to modify the phase, frequency, polarization or amplitude of a free-space laser. In contrast to acousto-optic modulators the spatial mode of the laser beam remains unaltered. Therefore, EOMs are the ideal choice when several frequency components are required in a laser spectrum. For instance, in laser cooling repumper frequency generation, ion trapping and quantum optics, for spectral broadening to suppress stimulated Brillouin scattering (SBS) in high power fibers, and for heterodyne techniques, like FM Spectroscopy, Modulation Transfer Spectroscopy or Pound-Drever Hall (PDH) Laser Frequency Stabilization. The modulation spectrum of our electro-optic modulators ranges from DC-coupled phase shifters to high-Q, resonant EOMs in the kHz, MHz and GHz range. Large apertures and a range of selected crystals materials (AR-coated or Brewster-cut) permit the use of high power lasers at UV to IR wavelengths.


QUBIG GmbH was started in 2008 by two young researchers in ultracold atomic physics with the intention to make useful tools and proven technological developments of fundamental research available to a broader community.

Qubig has extensive scientific know-how and practical experience in laser optics, high-frequency technology and mechanical design acquired at several renowned international research institutes:Enrico Vogt started his studies in Physics at the Ruprecht-Karls-Universität in Heidelberg. For his diploma thesis he went to the University of California / Berkeley, where he worked towards ultra- cold atom experiments in a ring-trap geometry. After that he did a Ph.D. at the University of Cambridge, UK with the focus on degenerate Fermi gases in optical lattices.

Dr. Enrico Vogt leads QUBIG GmbH as sole Managing Director. The company’s headquarter and production are based in Bavaria, Germany.