The fiber collimator type 60FC-PD-Q852Z-4-F120 has an integrated power monitor and additionally an integrated quarter-wave plate in order to generate a circular state of polarization.
Optical design
The radiation of a polarization-maintaining input fiber is collimated to a beam with a diameter in the range Ø 1 - 4 mm. A polarizer suppresses radiation guided falsely in the fast axis of the polarization-maintaining fiber. Now a beam splitting plate directs approx. 1.5 % of the radiation to a photodiode. In the transmitted beam, a quarter-wave plate changes the state of polarization from linear to left-handed or to right-handed circular polarization. Finally the beam is expanded to the desired beam diameter.
Adjustment of focus
All fiber collimators of seris 60FC-PD-Q are aligned for the specified wavelengths.
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. 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 is equipped with a type FC APC receptacle. An additional grub screw fixes the spring loaded ferrule of the fiber connector in order to increase pointing stability.
Material
The fiber collimators are made of nickel silver, black anodized aluminum and stainless steel.
Mounting
The collimators series 60FC-PD-Q all are comatible to the multicube™ system (microbench or cage system).
