Two-stage optical isolator with simplified assembly process and improved performance

摘要

The present invention discloses an optical isolator for preventing a reverse light transmission in a forward light transmission device. The optical isolator includes at least two birefringent crystals for forward projecting an incident light. The first birefringent crystal first separates the incident light into divergent beam components and the second birefringent crystal converges the divergent beam components into converging beam components for recombining into an output light. The second birefringent crystal receiving a light transmitting in a direction opposite the forward projecting incident light for producing separate and diverging beam components to project into the first birefringent crystal for further diverging the beam components by the first birefringent crystal.