Ultra-thin endoscopes: two-photon imaging at the tip of a bare fiber with wavefront shaping

In this letter, we will explore the utilization of specialty multi-core fibers combined with wavefront shaping to enable two-photon imaging using femtosecond pulses. Specifically, we will emphasize the optimization of both the design and the post-processing of these multi-core fibers to achieve a compact footprint (200 microns), efficient power delivery, and resilience to mechanical perturbations