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Optical Fiber Switchers

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For multi-channel sequential applications, tec5USA has developed a family of optical fiber switchers, known as optical multiplexers or “O-MUX”. tec5USA’s optical multiplexers are based on a unique patented micromechanical MEMS piezo concept and provide high flexibility, long-term stability and excellent repeatability. The switchers are available from 1:2 to 1:32 outputs, with a wide selection of multimode fiber types, materials, diameters (up to Ø800µm for best throughput), and connectors.

The optical fiber switchers are especially useful to configure multi-channel process analyzers where only one spectrometer is needed and connected to several probe outputs. Signals are acquired in a sequential manner. This setup is extremely cost-efficient for complex multi-point monitoring systems, such as Raman or NIR analyzers, as the spectrometer component can represent a significant part of the total system cost.

In the same manner multiple probes can be multiplexed to a single spectrometer, it is also possible to multiplex a light source to two, or more, probes. Relevant examples are the dispatch of a single 785nm laser to several Raman probes, or the distribution of a Xenon flash lamp to different flow cells.

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  • High long-term stability: >10^8 switching cycles.
  • Short switching times, even for larger fiber diameters (< 30 ms).
  • Excellent repeatability (< 0.03 dB).
  • Low insertion loss.


  • Very broad spectral range and large multimode fibers make these O-MUX solutions perfectly fit for spectroscopy process applications.
    Fibers can be solarization stabilized (UV grade, High –OH) to Low –OH (NIR grade), up to 800µm core diameters.
  • Total system cost reduction by utilizing only one detection platform, and connecting several inputs/outputs.
  • A modular design that can grow as more channels are introduced.


  • Number of output channels 1 to 32
  • Operating wavelengths UV-VIS, VIS-NIR
  • Insertion loss < 2.4 dB
  • Crosstalk < -40 dB
  • Repeatability 0.03 dB
  • Switching time 30 ms
  • Guaranteed lifetime > 10^8 cycles
  • Operating voltage typ. 5 VDC or 110-240 VAC
  • Power consumption < 450 mW

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