SMC-630Si-3-18C/30-xxx

The main features of the fiber cable type SMC-630Si-3-18C/30-xxx (also known as SMC-630Si-4.2-NA012-3-APC/SMA-C-xxx) include

Fiber
The fiber is a single-mode fiber, defined by its NA and its cut-off wavelength. The nominal NA is 0.12 and is specified by the fiber manufacturer. Additionally the effective numerical aperture NAe² is measured for each fiber batch by Schäfter + Kirchhoff. The fiber has an effective numerical aperture NAe² of 0.081 and a cut-off wavelength λ_co of 620 nm. Maximum wavelength is 860 nm. Besides the nominal cut-off wavelength λ_co, Schäfter + Kirchhoff also offers measured data for the cut-off wavelength for each individual fiber cable.

The fiber has a pure silica core for long-term stable low attenuation and high transmission.

Fiber cable
The fiber cable has a 3 mm jacket in black with Kevlar strain-relief and a length of xx cm.

Fiber Connectors
The fiber cable is equipped with a fiber connector of type FC APC (8 deg polish, core-centered, wide key) at the one end and a fiber connector of type F-SMA (0 deg polish) at the other end. All of the fiber connectors of type FC have an alignment index (key). The wide key (type "N") fiber connector has an alignment index (key) of 2.14 mm width.

The fiber has at least one core-centered connector to avoid misalignment of mechanical and optical axes, that might occur due to manufacturing tolerances.