| 摘要 |
PCT No. PCT/KR97/00248 Sec. 371 Date May 11, 1999 Sec. 102(e) Date May 11, 1999 PCT Filed Nov. 29, 1997 PCT Pub. No. WO98/23983 PCT Pub. Date Jun. 4, 1998An optical isolator capable of simultaneously transmitting a plurality of light beams emitted from a plurality of optical fibers in one direction. It includes a plurality of optical fibers for transmitting light beams; a pair of collimating lenses for converting the light beams, emitted from or entered into the optical fibers, into parallel light beams; a pair of symmetric birefringent elements having at least one tapered surface for emitting by polarization the plurality of parallel light beams having passed the collimating lenses, and condensing all the light beams traveling in a forward direction onto the optical fibers, respectively; and a Faraday rotator interposed between the birefringent elements for rotating the light beams incident thereto by 45 degrees. A plurality of tapered faces having the same tapered angle are formed on one surface of the birefringent element so that a plurality of light beams can be simultaneously transmitted in one direction.
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