A medical laser apparatus, including: an energy guide; a first energy source configured to generate energy for treating a target tissue through the energy guide; a second energy source configured to emit first and second aiming beams to a target tissue through the energy guide, the second aiming beam having at least one characteristic different from the first aiming beam; and a controller comprising hardware, the controller being configured to: receive a signal indicating an illumination mode from at least two illumination modes used by an endoscope to illuminate the target tissue; and control the second energy source to output the first or second aiming beam based on the indicated illumination mode.