633 nm, f = 15.15 mm, NA = 0.16 FC/APC Collimation Pkg.

Features Fiber Collimation Popular FC/APC Connectors Each Collimation Package is Factory Aligned Simplifies Free-Space Laser to Fiber Coupling Simplifies Fiber Coupled Detection Systems Non-Magnetic Stainless Steel Housing This fiber collimation package is pre-aligned to collimate a laser beam propagating from the tip of an FC/APC (2.1 mm wide key compatible) connectorized fiber with diffraction-limited performance at the design wavelength. The receptacle of the housing is angled, and the beam is aligned with the mechanical axis of the package. Because the fiber collimator has no movable parts, it is compact and not susceptible to misalignment. Due to chromatic aberration, the effective focal length (EFL) of the aspheric lens is wavelength-dependent. As a result, these collimators will only perform optimally at the design wavelength. The aspheric lens is factory-aligned so that it is one focal length away from the fiber tip when inserted into the collimator. This distance is equal to the focal length of the aspheric lens at the design wavelength. In addition, the aspheric lens has an AR coating that minimizes surface reflections. This FC/APC conectorized collimation package is ideal for systems that are sensitive to back reflections. APC-Style connectors utilize a ferrule that has an 8° end face, and in conjunction with an ultra PC polish, provide a return loss greater than 60 dB.