Below are the most common connectors used in the Specialty Fibers (non-telecom) industry.
SMA905-Most popular Connector for bundles up to 2.5mm diameter. 1/4 -36 threads.
FC-Spring loaded ferrule for singlemode or bundles up to 1.5mm diameter. 1/4 -36 threads.
Stepped Ferrule-Popular for larger bundles. Step acts as a precision stop.
ST-1/8 turn bayonet type. Spring loaded. Single mode and for bundles up to 2mm.
MTP-Used to connect up to 24 individual fibers. Quick disconnect.
LC-Single mode, small footprint.
Hypo-Hypodermic stainless steel tubing is available in numerous sizes down to .005″. Inexpensive, medical grade.