Fiber Collimator for collimating large beam diameters
The fiber collimators series 60FC-L is designed for collimating radiation
exiting optical fiber cables with high pointing stability and large beam diameters.
They can also be used in reverse-mode as fiber incouplers. They are suitable for
single-mode and polarization-maintaining fiber cables leading to collimated beams
with a Gaussian intensity profile.
Please note that for multimode collimation the intensity profile is not Gaussian
and depends on certain fiber and radiation properties.
The features of the collimator type 60FC-L include:
Optics
The
achromat
with focal length 50 mm is designed for collimating
multiple wavelengths. It is AR-coated from 650 - 1050 nm. It is
corrected for spherical aberrations and designed in such a way that it leads to
a diffraction-limited beam with an M2 < 1.05. Additionally it is corrected
for chromatic aberration so that there are certain wavelengths or wavelength
ranges where the focal length does not vary significantly. It is not suitable
for UHV applications.
Adjustment of focus
The distance between fiber end-face and collimating optics is adjusted by means
of an eccentric key. The lens does not rotate when adjusting the focus. The final
focus setting is locked by means of two radially arranged clamping screws.
Additionally attachment optics of series 60FC-L 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 is equipped with a FC-APC type receptacle.
Because of the spring-loaded fiber ferrule the fiber collimator has an additional grub
screw to increase pointing stability.
Material
The fiber collimator type 60FC-L is made from nickel silver/aluminium (standard)
Mounting
The collimators series 60FC-L all possess a flange for low-strain mounting
e.g. using the
clamp
collars series CC.
60FC-L-4-M50L-02
to attach in the front of collimators with M27x0.5 thread
for collimating radiation exiting an optical fiber or as an incoupler
Single-mode fiber cables
Polarization-maintaining fiber cables
