Abstract

A multi-lens retroreflector with field curvature compensation was designed and used in an alignment-free distributed-cavity laser with a long working distance for resonant beam charging applications. The multi-lens design, which makes use of off-the-shelf components, also allows a large field of view (FoV) without requirement of large element aperture. By implementing this design, an end-pumped 1063 nm Nd:GdVO₄ laser could deliver over 5 W continuous-wave output power over a large range of working distances (1–5 m) and with ±30° receiver FoV under an incident diode pump power of 16.6 W. The output power fluctuation was less than 10% when moving and tilting the receiver over such a large range, without requiring any realignment of the cavity.

© 2022 Chinese Laser Press

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