Joint Lab Laser Metrology - the Cooperation

Is it possible to pinpoint the distance to the sun as precise as the breadth of a hair? In order to help addressing such questions that focus on fundamental physics topics, the Joint Lab Laser Metrology was established at FBH in 2008. The Lab contributes to fundamental research by developing unique lasers that are a prerequisite for ultra-high precision laser-based measurements. The research is carried out in close cooperation with the Optical Metrology group headed by Prof. Peters at the Humboldt Universität zu Berlin.

  • laser chips
    [+] Multi-section laser chips on C-Mounts, used in macro setups and for tests
  • ECDL module
    [+] ECDL laser module, used on soundung rockets and in the drop tower
  • Fokus module
    [+] Laser module (under the transparent lid) with Rb spectroscopy reference module. Part of the FOKUS experiment, launched in April 2015 at TEXUS 51 rocket
  • Laser system of the KaLExUS experiment
    [+] Laser system of the KaLExUS experiment, carried out on January 23, 2016, as part of the TEXUS-53 mission of the sounding rocket programe of the German Aerospace Center DLR. Left: micro-integrated extended cavity diode laser developed by FBH.
  • Master oscillator power amplifier for quantum optics experiments
    [+] Master oscillator power amplifier for quantum optics experiments on ultra-cold rubidium atoms. On January 23, 2017, laser modules of this type where used within the MAIUS mission of German Aerospace Center DLR to realize, for the first time ever, a Bose-Einstein condensate in space, on board a sounding rocket.

The cooperation provides the framework for combining the complementary expertise of both parties, i.e., III-V semiconductor lasers and hybrid micro-integration at FBH on one side and precision optics and quantum optics measurements as well as fundamental physics at the Optical Metrology group on the other side. This way, the development of laser systems for laser metrology can be fostered. Semiconductor lasers are developed at FBH and laser-based precision measurements are carried out by HUB.

Laser metrology applications impose high demands on laser performance, specifically on optical output power, power and frequency stability, beam quality, compactness, and reliability. Applications driven by fundamental physics therefore play the role of a technology driver for the development of semiconductor-based lasers. In turn, fundamental physics experiments benefit from the progress made on laser development as well as from the fact that semiconductor lasers can be tailored for specific applications.

With this cooperation FBH can cover the full value chain of narrow-linewidth lasers, from simulation and design of semiconductor lasers and modules through fabrication, micro-integration, and detailed electro-optical characterization all the way to the application. The experience gained in applications, in turn, provides feedback for the next step in development. This way, a complete development cycle is implemented.