Thorlabs offers various types of threaded and unthreaded fiber adapters, which allow the most common types of connectorized fibers to be integrated with SM-threaded, C-Mount-threaded, or unthreaded components. The SM Series of Fiber Adapters allow FC/PC-, FC/APC-, SMA-, or ST-connectorized fibers to be integrated with components that feature either our SM05 (0.535"-40) or SM1 (1.035"-40) thread standard. The C-Mount-threaded fiber adapters provide a means for mating FC/PC-, FC/APC-, or SMA-connectorized fibers with components featuring internal C-Mount (1.000"-32) threading.
These adapters are commonly used when building single mode or multimode fiber couplers and collimators. They can also be utilized to provide light-tight coupling to our DET and PDA detectors. Other connector types are available upon request.
Please note that the adapters designed for use with FC/APC connectors have a mechanical angle of only 4°, even though the standard angle for these connectors is 8°. There is a 4° angle of deflection caused by the glass-air interface; when combined with the 4° mechanical angle, the output beam is aligned perpendicular to the adapter face.
The FCM is a post-mounting adapter for FC- or ST-connectorized fibers, or any other fiber connectorized with a Ø2.5 mm outer diameter ferrule. This flexure clamp includes an 8-32 (M4) tapped hole for post mounting, plus a 5/46" (2 mm) hex for clamping.