EXTERNAL CAVITY WITH RETRO-REFLECTING DEVICE IN PARTICULAR FOR TUNABLE LASERS

摘要

A retro-reflector is arranged for retro-reflecting an incident beam back to an optical component. The retro-reflector comprises three reflecting plates, two of which being arranged in parallel and one being arranged perpendicular to the parallel plates, so that the retro-reflected beam is parallel to the incident beam but with opposite propagation direction.