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Single mode pigtailed fiber collimators are used to transform the laser emitted from fiber into a parallel Gaussian beam by finely positioning the lens to fiber or couple the parallel Gaussian beam into fiber in inverse. It can be used in reflective type and thrubeam type. Normally, a sphere lens or GRIN lens is used in collimator to transform light. It can be divided into specified working distance collimators and wide working distance range collimators.
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Ultra long work distance fiber collimators have over 2km work distance by expanding laser beam from fiber to dozens of millimeters, even over 100mm beam diameter. It's used in telemetry, illumination, lidar and so on, which project laser to remote distance. Multi-groups air-spaced lenses are used to optimize the power distribution. The beam spot is homogeneous and has clear board line.
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Zoom fiber collimators can change beam size continuously while keeping beam pattern homogeneous and clear. It works like zoom lenses of camera, instead of only adjusting separation distance between lenses and fiber as focus adjustable fiber collimators. Beam quality is much better than focus adjusting. It can be used in telemetry, illumination, lidar and so on.
