USB 2.0 to fiber converter, also known as USB 2.0 to fiber extender. It can extend USB 2.0 signal over single-mode optical fiber up to 20KM.
The advantage of optical fiber communication are:
High reliability
More safety than copper cable
Free of EMI
Much longer transmission distance than copper cable
It can be used in critical environments to collect test data or other applications which need more reliability and sensitive signals easy affect by EMI.