Fiber Collimator Series 60FC-E

for an ellipical beam cross-section

Representative product images. Individual product images are found on the individual product pages.


Schäfter+Kirchhoff fiber collimators of series 60FC-E have a collimated elliptical beam with an axis ratio of up to 1:3. The state of polarization is linear and can be orientated in parallel with either the long or short elliptical axis.
  • Aspect ratio up to 1:3
  • Polarization linear polarized
  • Gaussian intensity profiles along both elliptical axes
  • Rugged and compact design
  • A front-fitting for attachments, such as a diaphragm


In some quantum optical experiments, collimated laser beams with an elliptical cross-section are used, for example as cooling beams in two dimensional magneto-optical traps (2D-MOTs) or in mirror MOTs. They are suitable for single-mode and polarization-maintaining fiber cables leading to collimated beams with a Gaussian intensity profile and an elliptical beam cross section with an axis ratio of up to 1:3.
The state of polarization is linear and can be orientated in parallel with either the long or short elliptical axis.

An optics for each application
A large variety of optical designs allows that the optimum focal length and the aspect ratio you need can be selected for each application. All lenses are AR-coated.

Optical design
The radiation of the fiber is collimated to a beam with a diameter in the range Ø 1 - 4 mm. An adjacent anamorphic beam shaping optics transforms the circular beam into a beam with an elliptical cross section. Finally the beam is expanded to the desired diameter.

Adjustment of focus
All fiber collimators of seris 60FC-E are aligned for the specified wavelength.
In case of need you can change the distance between fiber end-face and the first collimating optics by means of an eccentric key. The lens does not rotate when adjusting the focus fo both cases. The final focus setting is locked by means of two radially arranged clamping screws. Additionally attachment optics can be mounted to the front of the collimator.

Optimum lens performance
The angled polish of connectors of type APC is considered by a pre-angled mechanical coupling axis that compensates the beam deflection and you can use the lens centrically. This minimizes aberrations simply resulting from a non-ideal beam path through the lens.

Connector Type  
The fiber collimator can be equipped with FC PC, FC APC, F-SMA ST or DIN and AVIO receptacles. In case of FC or DIN (AVIO) with a spring loaded ferrule the fiber coupler has an additional grub screw to increase pointing stability.

The fiber collimators are made of nickel silver and black anodized aluminum.

The collimators series 60FC-E all posses a flange for low-strain mounting e.g. using the clamp collars series CC.

Besides these series 60FC-E fiber collimators there is the series 60FC-E-Q. These fiber collimators generate a collimated beam with elliptical cross section and with circular state of polarization.

Order Options

Order CodeAspect RatioEff. Focal LengthDesign WavelengthClear ApertureFor Connector Type
60FC-E-4-F30x90-4211 : 330 x   90 mm421 nm20 mmFC APC
60FC-E-4-F30x90-4611 : 330 x   90 mm461 nm20 mmFC APC
60FC-E-4-F30x90-6711 : 330 x   90 mm671 nm20 mmFC APC
60FC-E-4-F30x90-7411 : 330 x   90 mm741 nm20 mmFC APC
60FC-E-4-F57x114-7801 : 2 57 x 114 mm780 nm30 mmFC APC
60FC-E-4-F57x171-8521 : 357 x 171 mm852 nm42 mmFC APC
60FC-E-4-F70x210-7801 : 370 x 210 mm780 nm48 mmFC APC
60FC-E-4-F70x210-8521 : 370 x 210 mm852 nm48 mmFC APC