SMC-780-3-20TV/20ETV-xxx

SMC-E-780-5.0-NA013-3-OPC.TI/OPC.EC.TI-0-xxx
Single-mode fiber cable

SMC-780-3-20TV/20ETV-xxx
End cap for reduced power density at the fiber end-faceEnd
Cap

Features

Single-mode fiber cable with Gaussian intensity distribution and low-stress fiber connectors.
  • Cut-off wavelength: 760 nm
  • Max. wavelength: 970 nm
  • Effective fiber NAe2: 0.09 (± 0.005) @ 780 nm
  • Cable: 3 mm cable with Kevlar strain-relief
  • Connector Type (customer-specified): FC PC (0 deg, amagnetic), FC PC (0 deg, end cap, amagnetic)

Description

The main features of the fiber cable type SMC-780-3-20TV/20ETV-xxx (also known as SMC-E-780-5.0-NA013-3-OPC.TI/OPC.EC.TI-0-xxx) include

Fiber
The fiber is a single-mode fiber, defined by its NA and its cut-off wavelength. The nominal NA is 0.13 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 0.09 and a cut-off wavelength λco of 760 nm. Maximum wavelength is 970 nm. Besides the nominal cut-off wavelength λco, Schäfter + Kirchhoff also offers measured data for the cut-off wavelength for each individual fiber cable.

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 PC (0 deg polish, amagnetic, narrow key) at the one end and a fiber connector of type FC PC (0 deg polish, end cap, amagnetic, narrow key) at the other end. All of the fiber connectors of type FC have an alignment index (key). The narrow key (type "R") fiber connector has an alignment index (key) of 2 mm width. The fiber cable is vaccum compatible down to 10-7 mbar.

End Caps
The fiber is equipped with an end cap connector. This means that a short length of fiber (< 300 µm) without a core is spliced onto the polarization-maintaining fiber. Without a fiber core to confine the beam, the mode field diameter of the beam already starts to diverge within the fiber end cap, significantly reducing the power density at the fiber end-face.

Amagnetic fiber connectors
Amagnetic fiber connectors are completely made of titanium and have a ceramic ferrule. This ensures that the relative permeability µr of the connector is near 1 (χ = 5·10-5, µr = 1.00005), making it transparent to magnetic fields.