Abstract

A novel, to the best of our knowledge, cantilever construction design of an adaptive fiber-optics collimator (AFOC) based on piezoelectric bimorph actuators for tip/tilt control is introduced. With this new cantilever structure, an AFOC with a diameter of only 6 mm was developed, and the output laser beam deviation angle and resonance frequency of the device were measured. The experimental results show that this new AFOC can provide more than 1 mrad deflection angle at a 20 V driving voltage, and the first resonance frequency is about 500 Hz. Further, in order to verify whether the cantilever structure can be used in a high-power fiber collimator, a high-power ${X} {-} {Y}$ positioner with an 8 mm diameter fiber end cap was developed. The experimental results show that the high-power ${X} {-} {Y}$ positioner can output more than 2 kW laser power and provide about 330 µm displacement of the fiber end cap in the ${{X}}$ direction and about 770 µm in the ${{Y}}$ direction at a 150 V driving voltage.

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