Optical coatings for applications in industry and research
Optical coatings

Optical functional coatings are essential for laser and metrology systems. The Laser Zentrum Hannover e.V. (LZH) helps you choose both the optimum coating design and materials as well as the deposition processes for your application.


Different sophisticated coating technologies are available at the LZH for the manufacturing of optical coatings:

  • Ion Beam Sputtering (IBS)
  • Ion Assisted Deposition (IAD)
  • Evaporation techniques
  • DC Sputtering

State-of-the-art online monitoring processes guarantee the quality of the coatings. Among others, optical broadband monitoring (LZH-BBM), in-situ plasma analysis, in-situ stress measurements and in-situ defect analyses are used for this purpose.

The Optical Coatings Group manufactures discrete multi-layer systems, mixed materials with an individually configured refraction index, Rugate filters and gradient coatings. The multi-layer designs are developed with powerful algorithms and software tools. 

Our portfolio in the field of coatings comprises:

  • Mirror coatings

    • Highest quality class
    • High-power optics
    • Output coupling mirrors
  • Anti-reflection coatings

    • For the 120 to 4000 nm wavelength range
    • Multi-band AR coatings with minimum reflections for use in the laser resonator (R<0.05%)
    • Broadband AR coatings
  • Complex coatings

    • Extremely steep dichroic wavelength coupler
    • Polarization couplers
    • Multi-bandpass filters
    • Polarization-independent output and wavelength couplers
  • Coatings of crystals

    • Coatings of various crystals, such as KTP, PP-KTP, PPLN
    • Coatings of disc laser crystals
  • Special coatings

    • AR/highly reflective (HR) coatings of fiber ends
    • Low-loss coatings
    • Coatings without thermal shift
    • Chirped mirrors
  • Coatings for space applications

    • Filters
    • Mirrors
    • AR coatings

The manufacturing processes are integrated in a quality management system. In this way, the spectral behavior, optical losses and the laser-induced damage threshold are measured.

This service is, among others, relevant for the following areas

Optic coatings:

  • Ion Beam Sputtering (IBS)
  • Ion Assisted Deposition (IAD)
  • Evaporation techniques
  • DC sputtering methoden

Manufacturing processes:

  • Coating

Consulting, development and contract research:

  • Technology consulting and transfer
  • Technology transfer from research to industry

Fields of application and industrial sectors:

  • Aerospace


We will be happy to discuss your individual requirements. Please feel free to contact us.