Multimode optical fiber switches FSM-1by3 to FSM-1by9

Many applications in optical measurement systems, or data communication networks, require distribution and modulation of light, guided in optical fibers. The FSM-1x3, FSM-1x4, FSM-1x6 and FSM-1x9 series multimode optical fiber switches were developed mainly for applications in the field of spectroscopy and metrology. The signal of one input fiber can be switched to 3 (FSM-1x3) or up to 9 (FSM-1x9) output channels.
Based on the cascaded mechanical switching principle, any number of output channels can be provided.
The unique switching principles are based on piezoelectric elements providing a fast switching frequency of up to 500 Hz. These systems work with multimode fibers with a core diameter ranging from 50 µm up to 660 µm. Other fiber parameters can be offered without problems upon request.

All switches from piezosystem jena work without any optical components. Hence, there is no dependency on any wavelength. All switches can be used from UV up to the IR region.
The switches have bulkhead connectors at the front panel. Optionally the switches can be equipped with outgoing fibers of customer specific length. The control is realized via BCD code, USB or RS232. Optionally an ETHERNET interface is available. A demo version of a controlling software comes with the switch.

If you wish to receive further information about this product please use our contact form or send an email to: sales(at)

FSM-1x3 to FSM-1x9

+1 (508) 634-6688U.S. Office

+49 (3641)-6688 0German Office

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