Fiber Couplers and Fiber Collimators are used for coupling into single-mode 

and polarization-maintaining fiber cables or for producing a collimated beam (low divergence beam)

 with Gaussian beam profile exiting a single-mode fiber cable.They are sorted by series,

 or by which fiber they are used with (sm, pm or mm). 

All have an adjustable focus and are available for different connector types 

(including FC connectors FC PC, FC APC as well as ST, DIN and AVIO or F-SMA).

 Amagnetic Fiber Couplers (made from Titanium) are also available.

- Schafter + Kirchhoff