Abstract
We present what we believe the first experimental observation of a nanosecond zero order pulsed Bessel beam generated from an unstable resonator based on an axicon. The field distribution at the output coupler is simulated by means of Fox–Li iterative computation. It is shown that the experimental result is consistent with the numerical simulation. The application field and forecast of the zero-order Bessel beams are very wide, such as precision cutting and micro-operation experiment. Our experiments offer a new way to output zero-order Bessel beams directly.
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