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. For compatibility with other threadings, please see our complete line of thread adapters.
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.