Schäfter+ Kirchhoff ships all collimators prealigned and collimated for either a specific wavelength defined by the customer or a typical wavelength. The collimation is performed using professional collimating telescopes.
Please note: The fibers used in this adjustment procedure are all equipped with an end cap when aligning for wavelengths ≤ 520 nm.The adjustment wavelength is given on the label for each collimator/coupler. If a fiber with end cap was used it is marked by "EC".
However, it might be necessary for a customer to readjust the collimating setting and collimate for another wavelength or simply readjust the collimation setting without having a professional collimating telescope at hand.
The following describes some tricks and tips for the collimation adjustment of single-mode, PM or multimode fibers. Please note that single-mode and PM collimation is significantly different than multimode collimation.