Fiber collimators are widely used in optical communication components and fiber-optic sensors. Ordinary fiber collimators are made with a circular beam waist radius from 100 (mu)m to 300 (mu)m. The circular beam waist is too large to switch or shut the beam for certain micro-electro-mechanical system (MEMS) actuators (such as MEMS linear mirrors). In this paper, a dual-fiber collimator with an elliptical spot is proposed to meet the demands of MEMS optical devices. The elliptical spot collimator has been designed and fabricated, the beam waist spot of which is an elliptical spot with a 231.6 (mu)m long-axis radius and a 12.87 (mu)m short-axis radius, and its coupling loss is 0.37 dB.
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机译：光纤准直仪广泛用于光通信组件和光纤传感器。普通的光纤准直器制成的圆形束腰半径为100μm至300μm。对于某些微机电系统（MEMS）致动器（例如MEMS线性镜），圆形束腰太大而无法切换或关闭束。本文提出了一种具有椭圆形光斑的双光纤准直仪，以满足MEMS光学器件的需求。椭圆光斑准直器已经设计和制造，其束腰光斑是长轴半径为231.6μm，短轴半径为12.87μm的椭圆光斑，耦合损耗为0.37 dB 。
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