Injection of high optical power from lasers into fibers is a problem with standard connectors.
Slight misalignment, non optimised focus point, poor spot quality are causes of fiber and connector destruction.
Standard connectors with epoxy around the fiber up to the optical face are burning easily.
For high power injection the fiber end must not be in contact with epoxy or metal.
Consequently several connectors solutions have been developed derived from the SMA standard (protruding fiber, window, etc.)
The SEDI-ATI’s "NOVA" SMA with “free end and copper ferrule” is the result of a long cooperation between laser manufacturers and our R&D department.