<p>A waveguide can effectively confine and manipulate light at the micro- and nano-scales. In the work, the waveguides on the Dy:LPS crystal were formed via the 6-MeV O³⁺-ion implantation with a dose of 5 × 10¹⁴ ions/cm² and the 3.0-μJ pulse energy femtosecond laser ablation with a scanning velocity of 50&#xa0;μm/s. The SRIM 2013 was utilized to simulate the energy loss caused by the collisions between the O³⁺ ions and the particles in the Dy:LPS. The dark-mode curve of the O³⁺-ion-implanted Dy:LPS waveguide was measured via a prism coupler. The RCM software was employed to fit its refractive index profile. It suggests that an enhanced well and an optical barrier serve as a waveguide core and a cladding layer, respectively. The near-field intensity distributions were studied by an end face coupling system and a FD-BPM. The O³⁺-implanted and laser-ablated waveguides on the Dy:LPS crystal have possibility for the integrated optical devices.</p>