Flexible medical probe
for near infrared spectroscopy

Cross section converter -
light guide row of glass fiber

FBG-based strain sensor with
integrated temperature compensation

Silica light guide, one channel with
metal hose and FSMA plug

FBG-based temperature sensor
calibrated up to 700°C

Tailor-made fiber optic light guide solutions
and fiber optic sensors


Loptek has been designing and manufacturing tailor-made fiber optic light guide solutions and fiber optic sensors for more than 25 years. The customer-specific products are used, among other things, in power plant monitoring, medical technology and industrial process monitoring.

The added value for the customers of Loptek lies in the consistent support, starting with the development of the prototypes, to the start-up of the series production and then to the continuous optimization of the products and the manufacturing costs.

Loptek, thanks to its many years of experience, has been perfectly aligned to the needs of industrial customers who integrate the fiber optic components into their overall solutions. Product traceability, quality management and delivery reliability are part of the corporate DNA.

Loptek is part of the engionic Group.

Product Portfolio

Fiber Optic
Light Guides
and Components

Fiber Optic Lights Guides

Cross section Converters

Vaccum Feedthroughs

Reflection Probes

Medical Probes

OEM Developments


Temperature Sensors

Strain Sensors

Individual oem
Sensing Solutions

Special Offer




  • Processing of different fiber materials as a single fiber or fiber bundles (plastic, glass and silica glass)
  • Assembly of single fibers and fiber bundles in cables up to approx. 100m length
  • Single mode assembly with FC/APC and LC/APC connection
  • Production of cross-section converters with slit width from 100µm
  • Manufacturing of angular head arrangements in metal and plastic
  • Production of concentric arrangements with multiple rings
  • Processing of various protective hose materials (stainless steel with and without braiding, plastic, metal, plastic-coating)
  • Processing of metal-coated fibers (Cu, Al, or Au)


  • Bonding, especially for high-temperature applications
  • Crimpen
  • Laser welding
  • Ovens for adhesive curing and testing


  • Custom-specific development of optical solutions for technical measurement
  • Regularly participation in development and research projects on special light guide arrangements and sensor developments in medicine and industry


  • Usage of worldwide leading fs-laser-written FBGs from the market leader and sister company FemtoFiberTec
  • High R&D competence for the development of customer specific sensor solutions
  • Adaptation of exsisting standard sensor concepts to customer specific environmental and technical requirements
  • Cost efficient volume production from the FBG manufacturing to the ready-to-use sensor
  • Housing of FBG sensors in a vast range of designs and materials
  • In-house high precision mechanical workshop
  • High precision temperature sensor calibration from -40°C to 300°C
  • Calibration of strain sensors in various designs
  • Connectorisation for all common connector types
  • Absolute residue-free coating of fibers according to customer requirements up to 2m length (polyimide, acrylate, ormocer)
  • Annealing technologies also for long lengthes
  • Broad range of glueing, crimping and welding technologies available
  • Combination of FBG sensors with vacuum feedthroughs


  • In-house design
  • In-house mechanical workshop with conventional and CNC-supported turning and milling technology
  • Production of accessories for the light guide technology such as lens attachments, air-cooled lances, pressure barriers and probes with optical windows