| 摘要 |
An optical isolator capable of simultaneously transmitting a plurality (10) of light beams emitted from a plurality of optical fibers (12, 14) in one direction. The optical isolator includes a plurality (10; 70) of optical fibers (12, 14; 72, 74) for transmitting light beams, a pair of collimating lenses (20, 60) for converting the light beams emitted from or entered into the optical fibers into parallel light beams, a pair of symmetric birefringent elements (30, 50), having at least one tapered surface (32, 34; 52, 54), for emitting by polarization the plurality of parallel light beams having passed the collimating lenses (20, 60) and condensing all the light beams traveling in a forward direction onto the optical fibers, respectively, and a Faraday rotator (40), interposed between the birefringent elements (30, 50), for rotating the light beams incident thereto by 45 DEG . A plurality of tapered faces (32, 34; 52, 54) having the same tapered angle (9) are formed on one surface of the birefringent element (30, 50), so that a plurality of light beams can be simultaneously transmitted in one direction. |
