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Micro Laser Systems Inc. has introduced the FC40 fiber collimator, which has a large 46-mm aperture and generates a beam measuring ~20 mm. It has adjustable focus with no rotation to enable fine tuning of the wavelength. Once the proper focus or collimation is found, it can be locked down. All optics have a broadband antireflection coating that has no epoxy in the optical path. Wavefront error is <λ/10 over 1/e² points. Output is diffraction-limited to yield a Gaussian beam at large distances. The collimator is packaged in a stainless steel housing and is available with FC or FC/APC receptacles. An optional mount is available for attaching it to a tripod or optical hardware. Applications include lidar, free-space communications, interferometry and large structure alignment.