Optical probes

For spectroscopic analysis methods in the chemicals and pharmaceuticals industries

In many fields of application in optical sensor and analysis technology, optical fibers and components are required for illumination and for light detection. We create customer-specific assemblies for various fiber types and fiber bundles that continue to function reliably under the harshest of conditions, such as in industrial environments – or even in outer space. Examples for the deployment of fiber optical components in a wide range of application scenarios include:

  • measuring probes in the chemicals industry
  • fiber feedthroughs for signal transmission in vacuum applications
  • fiber systems for temperature measurement in high-temperature applications
  • offshore measurement systems in wind turbines or on oil platforms
  • fiber measurement system in astrophysics

Your advantages at a glance

  • A coordinated probe design for special optical fibers to protect against the environmental conditions in your specific application: development, design, manufacturing, and raw materials from a single source
  • Probe heads for optical measurements with specific equipment for your measurement scenario (e.g. window, integrated air purging, high-temperature)
  • Suitable for difficult environmental conditions and harsh industrial surroundings
  • Suitable for liquids, gases, or solids
  • Fiber optics experts at every stage in the value chain – from raw materials and fibers, cables, and components through to special optical components and probes

Range of products and services

Product portfolio

  • All fiber types are available for use in probes
  • Fiber core diameter 10 µm to 2000 µm 
  • Numerical aperture 0.10 to 0.49 
  • Various diameters, bundles, probes, special designs
  • Customer-specific bundle design (round, line, square, rectangular)
  • Various fiber combinations (statistically configured, others)
  • Fiber optical probes
    • Transmission and transflectance probes
    • Process probes
    • Reflectance probes
  • Design with a wide variety of fiber configurations:
    • Single fiber
    • Fiber array
    • Fiber bundle
    • Customer-specified probe geometry



For measuring:

  • FTIR
  • transmission
  • transflection
  • reflection
  • emission
  • Physical, dynamic and geometric parameters such as temperature, pressure, expansion, Raman, Rayleigh and Brillouin scattering, fluorescence, etc.

Product properties

  • For the analysis of liquid, gaseous or solid substances
  • Broad temperature spectrum
  • Adequate protection in demanding environments (industrial, chemical, outer space)
  • Resistance to chemicals and other media
  • Mechanical strength and stability

Ordering options

  • Single- and multimode fibers
  • Probe geometry
  • Single-channel, multi-channel
  • Length
  • Wavelength (UV-VIS-IR)
  • Temperature range
  • Customer-specific probe designs
  • Various coating and cladding materials
  • Various protective tube types (PTFE, PVC, metal/PVC, metal/silicone, stainless steel)
  • Connectors (SMA, FC/PC, DIN, ST, customer-specific connectors)
  • Definition of protection requirements (e.g. ATEX)
  • Various assembly options
    • Vacuum feedthroughs
    • Protected fiber assemblies
    • Flow cells
    • Measuring cells (liquids, gases)

Fields of use

  • Spectroscopic analysis (Raman, NIR, MIR, UV-VIS)
  • Particle measurement
  • Surface sensor technology
  • Safety systems
  • Environmental analysis
  • Quality control 
  • Pyrometric applications
  • Optical probe as part of the instrumentation for the New Horizons (Pluto Mission) space probe



Please contact us for further information. We look forward to your inquiry.

Europe, Africa, and Asia (excl. China)
Phone +49 36764-81-100
Email fiber-optics@leoni.com

Phone +86 519-8988-7783
Email fo-china@leoni.com 

North and South America
Phone +1 757-258-4805
Email contact@leonifo.com

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