| 摘要 |
To provide an optical circuit element and, particularly, an optical circulat or or the like, that exhibits an excellent extinction ratio and that can be easily produced at a decreased cost. An optical circuit element comprising, in combination, two polarized light-separating elements, two totally reflecting mirrors, at least a piece of polarizing plane rotating element independent o f a direction of travel of light, at least a piece of polarizing plane rotatin g element dependent of a direction of travel of light, a plurality of light incident/outgoing ports, and a magnetic field application means, wherein sai d polarized light-separating elements and said totally reflecting mirrors are formed of the same or different multi-layer polymer films.
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