The mode scrambler option for a line of high power laser delivery assemblies protects the fiber optic conduit by conducting heat away from the fiber end. Incorporated into the proximal end of the laser assembly, the mode scrambler allows the laser beam a homogeneous exit. The assembly option employs a custom designed high-power SMA connector, which utilizes air gap technology to eliminate all energy absorbing materials at the fiber end. The cantilevered fiber end can accept very high power levels that would normally destroy traditional fiber termination. A uniquely designed heat sink is thermally and mechanically connected to the assembly to effectively conduct generated heat away from fiber.