Joint Lab Quantum Photonic Components

The concept of quantum sensors is based on determining the value of the physical quantity of interest by referring its measurement back to the measurement of a frequency. Quite often, the frequencies of interest are optical frequencies or differences between optical frequencies. These are "realized" by means of narrow or ultra-narrow linewidth lasers.

  • ECDL for JOKARUS experiment in space
    [+] Micro-integrated extended cavity diode laser module for precision iodine spectroscopy in space, used in the JOKARUS experiment
  • FOKUS laser unit
    [+] Fiber-coupled rubidium laser module used for the FOKUS experiment on TEXUS51 rocket in space
  • Hybrid-integrated MOPA for rubidium spectroscopy
    [+] Hybrid-integrated master oscillator power amplifier for rubidium precision spectroscopy (780 nm) on board a sounding rocket
  • Precision mounting of laser modules for space
    [+] Mounting with highest precision of hybrid-integrated diode laser modules suited for space applications
  • High-quality optical microresonator structures made of silicon oxide
    [+] High-quality optical microresonator structures made of silicon oxide - by integrating evanescent coupling waveguides "on-chip" they are particularly suited for the replacing classical macroscopic resonators in micro-optical applications
  • Evanescent coupling between a fundamental mode waveguide and a ring resonator
    [+] Evanescent coupling between a fundamental mode waveguide and a ring resonator, both waveguides are suspended in air

Coherent radiation is also required for the (quantum) coherent manipulation of atomic ensembles. "Stabilization modules" and "distribution modules" allow for proper manipulation of the laser radiation, e.g., frequency stabilization, frequency shifting, or pulse shaping.

The central aim of the Joint Lab Quantum Photonic Components (QPC) is to develop and deliver diode laser modules, spectroscopy and distribution modules as well as components thereof to pave the way for quantum technology to be utilized in real-world application scenarios. Hence, activities range from research on new concepts for lasers or components to the development of technologies required to advance a proof-of-concept demonstrator to an industry-compatible prototype. R&D is carried out and strategically synchronized with corresponding activities of the Joint Lab Integrated Quantum Sensors (IQS) at FBH, which covers the system aspect of quantum sensors including the physics package. Together, both Joint Labs cover the full value chain from components to system. Their activities cover the complete technology chain, from modeling of photonic components through hybrid micro-integration of electro-opto-mechanical setups to system design and operation of quantum sensors.

The Joint Lab Quantum Photonic Components covers the following research topics

  • Modeling, simulation, and design of active and passive electro-optical semiconductor components and of components required for hybrid micro-integration of electro-optical modules
  • Development of technologies for hybrid micro-integration of complex electro-optical modules, including smart automation of alignment and integration steps
  • Modeling, simulation, and design of micro-integrated electro-optical modules, specifically for quantum technology applications and coherent (inter-satellite) communication
  • Development of techniques required for in-depth characterization of the electro-optic performance of lasers and of electro-optical components, specifically for the characterization of user-relevant parameters

The Joint Lab Quantum Photonic Components was established in 2008 at FBH to foster co-operation with the Optical Metrology Group at Humboldt-Universität zu Berlin, at that time under the name Joint Lab Laser Metrology. Now renamed, it serves as the nucleus of the Integrated Quantum Technology research area at FBH, which was set up in 2019.